[Bug 100306] System randomly freezes or crashes to the login screen, glitches until rebooted

[Bug 100306] System randomly freezes or crashes to the login screen, glitches until rebooted

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https://bugs.freedesktop.org/show_bug.cgi?id=100306

Michel Dänzer <michel@daenzer.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Version|unspecified                 |17.0
         QA Contact|xorg-team@lists.x.org       |dri-devel@lists.freedesktop
                   |                            |.org
           Assignee|xorg-driver-ati@lists.x.org |dri-devel@lists.freedesktop
                   |                            |.org
            Product|xorg                        |Mesa
          Component|Driver/Radeon               |Drivers/Gallium/radeonsi

--- Comment #9 from Michel Dänzer <michel@daenzer.net> ---
Looks like GPU lockups, which are most likely due to an issue in
Mesa/LLVM/kernel. Reassigning to Mesa for now.

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[Bug 100306] System randomly freezes or crashes to the login screen, glitches until rebooted

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https://bugs.freedesktop.org/show_bug.cgi?id=100306

MirceaKitsune <sonichedgehog_hyperblast00@yahoo.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #10 from MirceaKitsune <sonichedgehog_hyperblast00@yahoo.com> ---
I'm happy to announce that since xorg-x11-server 1.19.3 and / or xf86-video-ati
7.9.0 the issue appears to have been remedied. I now have over 5 days of
uptime, with not a single GPU freeze caused by the desktop. If by chance the
problem returns, I'll definitely post an update and let everyone know. It would
be very appreciated if in the future, the Xorg team and driver developers could
please consider more in-depth testing for GPU lockups, to prevent this sort of
thing from repeating.

I imagine this issue can be marked as resolved. I will reopen it if I see the
problem happening again. Feel free to otherwise reopen it if anyone believes
there's still something to investigate.

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[Bug 100306] System randomly freezes or crashes to the login screen, glitches until rebooted

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MirceaKitsune <sonichedgehog_hyperblast00@yahoo.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
         Resolution|FIXED                       |---

--- Comment #11 from MirceaKitsune <sonichedgehog_hyperblast00@yahoo.com> ---
To my stupefaction, the exact same issue has been re-introduced and is
happening again. After another openSUSE Tumbleweed snapshot and several package
updates, I believe approximately 2 days ago, the freeze occurs once more. I can
however confirm that for approximately 8 days before that, the problem went
away as I had one week of uninterrupted uptime. Can someone please analyze what
changes fit this time pattern?

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[Bug 100306] System randomly freezes or crashes to the login screen, glitches until rebooted

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--- Comment #12 from Michel Dänzer <michel@daenzer.net> ---
(In reply to MirceaKitsune from comment #11)
> I can however confirm that for approximately 8 days before that, the
> problem went away as I had one week of uninterrupted uptime. Can someone
> please analyze what changes fit this time pattern?

Not without more information about what changed on your system when the problem
apparently stopped and started again (or alternatively, a magic crystal ball
;).

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[Bug 100306] System randomly freezes or crashes to the login screen, glitches until rebooted

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--- Comment #13 from MirceaKitsune <sonichedgehog_hyperblast00@yahoo.com> ---
(In reply to Michel Dänzer from comment #12)

Like I said, I use openSUSE Tumbleweed and its latest official system packages.
openSUSE has a lot of useful web tools, so I assume a package history should
exist somewhere? If not, can anyone tell me how to dump my package installation
history over the last month from zypper, so I can post a new log?

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[Bug 100306] System randomly freezes or crashes to the login screen, glitches until rebooted

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--- Comment #14 from Michel Dänzer <michel@daenzer.net> ---
This is the upstream bug tracker. For openSUSE related help, talk to openSUSE
folks.

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[Bug 100306] System randomly freezes or crashes to the login screen, glitches until rebooted

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--- Comment #15 from MirceaKitsune <sonichedgehog_hyperblast00@yahoo.com> ---
(In reply to Michel Dänzer from comment #14)

Yes, but it's due to an issue in one of the system components. I'm talking
about it there for the packaging related aspect, but figured this is helpful
for debugging the issue itself.

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[Bug 100306] System randomly freezes or crashes to the login screen, glitches until rebooted

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--- Comment #16 from fin4478@hotmail.com ---
KDE is slow and buggy desktop and it does not even have freely configurable
menus like the Xfce Whisker menu is. Test with Xfce and lightdm.

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[Bug 100306] System randomly freezes or crashes to the login screen, glitches until rebooted

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--- Comment #17 from MirceaKitsune <sonichedgehog_hyperblast00@yahoo.com> ---
Very important note: While investigating a completely unrelated bug, I
remembered that KWin was configured to use egl over glx on my machine. I
believe glx is the old render architecture, whereas egl is the new renderer
which uses OpenGL and is visibly a lot faster.

Considering that desktop activity was always the cause of the freezes in some
form, I have a strong suspicion that this might have something to do with the
GPU freezes as well! It's a very likely candidate because egl involves
experimental OpenGL rendering, and since it's not enabled by default that would
also explain why few other people are able to reproduce the GPU lockups. I have
just now switched back to glx and therefore haven't had the time to confirm
this, but I'm willing to bet it just might make the problem go away... I will
immediately post an update if and when I'm proven wrong obviously.

If anyone else wants to test this theory and help in reproducing the system
freeze, consider switching to egl rendering. Obviously this means your machine
might start freezing as well, so only do this if there's no risk of data loss
or major annoyance. The switch is done by opening ~/.config/kwinrc in a text
editor and changing:

GLPlatformInterface=egl

to

GLPlatformInterface=glx

Note that if you're using an Aurorae theme, you might experience the bug I
mentioned above, which involves KWin no longer rendering window decorations.
Here are the reports for that in case anyone is curious:

https://bugzilla.opensuse.org/show_bug.cgi?id=1033598
https://bugs.kde.org/show_bug.cgi?id=378663

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--- Comment #18 from MirceaKitsune <sonichedgehog_hyperblast00@yahoo.com> ---
Nope, still happens in glx as well. Switching away from egl rendering does not
make the freezes go away.

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[Bug 100306] System randomly freezes or crashes to the login screen, glitches until rebooted

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--- Comment #19 from MirceaKitsune <sonichedgehog_hyperblast00@yahoo.com> ---
llvm 4.0.0 is now in openSUSE Tumbleweed: I have preformed a 'zypper dup',
installed it, and restarted. Now it's time to see if this really makes the
freeze go away.

Please allow me to keep this issue open for another month to make sure it's
truly gone: If through some stretch of imagination I see the problem again,
I'll immediately post a reply here and let everyone know! I need to take at
least several days to have no doubt it has been solved, due to how far its
probability seems to have ranged. Thank you.

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[Bug 100306] System randomly freezes or crashes to the login screen, glitches until rebooted

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--- Comment #20 from MirceaKitsune <sonichedgehog_hyperblast00@yahoo.com> ---
The same freeze happened again today, after a two week period of not seeing the
problem any more. This is reaching the point where it's becoming outright
ridiculous: I've used openSUSE for years, and have never seen such a thing
spanning over such a long time period.

Unfortunately I can't risk breaking my system by installing custom versions of
llvm or the system wide Mesa. I can only hope the developers know what to
bisect to find out where this fault lies, based on the logs I've attached here.
Let me know if there is more info I could somehow help with.

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[Bug 100306] System randomly freezes or crashes to the login screen, glitches until rebooted

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MirceaKitsune <sonichedgehog_hyperblast00@yahoo.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|high                        |highest
           Severity|major                       |critical

--- Comment #21 from MirceaKitsune <sonichedgehog_hyperblast00@yahoo.com> ---
Once again, I'm dealing with at least one system crash per day. The latest one
happens even after upgrading to the 4.11.0 Kernel, meaning the error was ported
to it as well.

Why are the developers so incapable this time? This has been happening for
nearly 3 darn months! The problem has been fixed twice, and each time it's
returned after over 2 weeks. Can someone please explain what the heck is going
on here? At this stage, it feels like someone is actively developing and
updating this freeze against the latest system components... I don't even see
how it could survive through this many package updates by chance alone, it is
ridiculous.

And please don't lecture me on how this is free software, and I should only be
complaining if I was actually paying the developers: There is a limit beyond
which an important piece of software, be it a free Linux distribution or
component, can break and stay broken. To literally be unable to keep a system
running without the image suddenly freezing and the monitor shutting down every
single day, for over a quarter of an year... that goes far beyond that limit.

I'm sorry for the outburst, but at this stage I think something needed to be
said. I did not expect something like this to get dragged so far, and that I'd
be unable to keep my system running for months. I'm going to bump the severity
of this issue again, in hopes that someone can please take a look at it so I
can run my system normally again! Thank you.

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Daniel Stone <daniel@fooishbar.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |daniel@fooishbar.org

--- Comment #22 from Daniel Stone <daniel@fooishbar.org> ---
(In reply to MirceaKitsune from comment #21)
> Why are the developers so incapable this time? This has been happening for
> nearly 3 darn months! The problem has been fixed twice, and each time it's
> returned after over 2 weeks. Can someone please explain what the heck is
> going on here? At this stage, it feels like someone is actively developing
> and updating this freeze against the latest system components... I don't
> even see how it could survive through this many package updates by chance
> alone, it is ridiculous.

You may be surprised to hear that the code is not an explicit 'if (rand())
hang_gpu();' call.

> And please don't lecture me on how this is free software, and I should only
> be complaining if I was actually paying the developers:

Regardless, insulting people is rarely the best way to get them to do things.
Everyone has more problems to solve than hours in the day, and the guy calling
people 'incapable' does not tend to work his way to the top of the list.

> I'm sorry for the outburst, but at this stage I think something needed to be
> said.

No, it really did not. I understand your frustration, and I'm sorry to hear it,
though as the Bugzilla footer notes, the freedesktop.org Code of Conduct
applies here:
https://www.freedesktop.org/wiki/CodeOfConduct/

If you cannot keep your behaviour civil in future, your access to this bug
tracker will be revoked. Thanks for your understanding, and I do hope your bug
gets resolved.

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[Bug 100306] System randomly freezes or crashes to the login screen, glitches until rebooted

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--- Comment #23 from MirceaKitsune <sonichedgehog_hyperblast00@yahoo.com> ---
(In reply to Daniel Stone from comment #22)
> (In reply to MirceaKitsune from comment #21)
> 
> You may be surprised to hear that the code is not an explicit 'if (rand())
> hang_gpu();' call.
> 
> Regardless, insulting people is rarely the best way to get them to do
> things. Everyone has more problems to solve than hours in the day, and the
> guy calling people 'incapable' does not tend to work his way to the top of
> the list.
> 
> No, it really did not. I understand your frustration, and I'm sorry to hear
> it, though as the Bugzilla footer notes, the freedesktop.org Code of Conduct
> applies here:
> https://www.freedesktop.org/wiki/CodeOfConduct/
> 
> If you cannot keep your behaviour civil in future, your access to this bug
> tracker will be revoked. Thanks for your understanding, and I do hope your
> bug gets resolved.


Alright. Can't argue that and I'll keep your words in mind... also I wasn't
looking to insult anyone per say. Please understand this sort of thing is
something I've never dealt with in nearly 5 years since I use Linux, and I
don't understand either how it happens nor why nothing is being done: Not only
is it the most severe type of issue, and that it's been there for months, but
it's literally coming and going on a weekly schedule. I'd care less if it was a
minor issue, but I literally can't preform daily activities properly because my
monitor simply shuts itself down randomly for no reason! I don't have Windows
and wouldn't want to use it again, nor can I downgrade to a version as old as
before the time I can assume the issue started... what am I to do?

I'll try to be more calm, but I believe this sort of thing needs to have some
solution. There are millions of people using these drivers, I don't think it's
a normal situation that they can't use their machine safely and no one even
knows what's triggering it... if this happened in Windows it would probably
make headlines.

Anyway I don't want to take this off-topic. I'll wait for more answers and post
new updates as I see changes. Sorry again for earlier.

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--- Comment #24 from MirceaKitsune <sonichedgehog_hyperblast00@yahoo.com> ---
More info after the latest crash: In ~/.config/kwinrc I tried setting
GLCore=false and GLColorCorrection=false, however none of these seem to affect
the problem although I found them suspicious. I wonder if other such settings,
such as vsync (tearing prevention) could make a difference... there are many
combinations to try, and I'm not sure which also affect the system when
compositing is off.

When the system doesn't completely freeze, the behavior of the problem can be
very strange at times; Last night after the desktop froze, I quickly hit
Control + Alt + Backspace several times to kill X11... the system went into a
console, which started flashing continuously together with the HDD led. I
couldn't do anything on my keyboard and mouse... but once I pressed the power
button it stopped and the machine shut itself down quickly and cleanly, meaning
it still received the power off signal and managed to recover from that.

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--- Comment #25 from Alex Deucher <alexdeucher@gmail.com> ---
Can you narrow down what component update caused the issue?

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--- Comment #26 from MirceaKitsune <sonichedgehog_hyperblast00@yahoo.com> ---
(In reply to Alex Deucher from comment #25)
> Can you narrow down what component update caused the issue?

openSUSE Tumbleweed upgraded from Mesa 17.0.5 to 17.1.0 yesterday. I'm still in
the process of seeing whether this affects the issue and how... so far no
freezes, and over 1 day of uptime which should at least mean it's rarer.

I do not believe it's the Kernel: The same freeze started with Kernel 4.9.0,
persisted in 4.10.0, and ever after 4.11.0 it happened again. A kernel issue
would have been impossible not to notice during months of development.

Other components aren't updated as frequently or easy for me to track, and with
the issue happening once every day there's no way to test it on demand. As such
I don't currently have more info on what the source could possibly be.

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--- Comment #27 from MirceaKitsune <sonichedgehog_hyperblast00@yahoo.com> ---
In weekly news, it appears a recent openSUSE Tumbleweed snapshot (which among
other changes upgraded Mesa 17.0.5 to 17.1.0) made the issue a lot rarer for
the time being: Until this snapshot it was even happening twice a day, hence
why it was starting to drive me nuts... now I only seem to get this freeze
every 2-3 days of uptime, which is so much more bearable! I worry whether the
next snapshot will make the issue more frequent again rather than better...
clearly it's one of the important system packages that's messing with it, but I
still have no idea which and how.

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--- Comment #28 from MirceaKitsune <sonichedgehog_hyperblast00@yahoo.com> ---
After another two weeks of absence, the issue was apparently reimplemented on
top of Kernel 4.11.3 + Mesa 17.1.1 + Plasma 5.10.0, likely sometime during the
last few days. The behavior is once again identical, with alt-tab switching or
desktop effects causing everything but the mouse pointer to freeze then after
10 seconds the monitor shuts down. Other unrelated GPU crashes (such as those
caused by some games) behave by the classic model, where the entire system
simple freezes in place at once... that's a very different result from this
freeze, and likely confirms this is a different type of crash.

At this point I have almost no doubt this is an attack that's being
deliberately programmed, and manually reimplemented on top of new drivers once
it gets fixed. The cycle seems to be that a kernel or driver update resolves
the issue, then the creators of the crash require about two weeks to patch it
and reimplement the exact same functionality. This is the 4th time the story
repeats.

I tried steering away from this possibility until I was sure, as I didn't want
it triggering any unnecessary arguments... if this is an attack then
investigating it as such might help in finding its source more quickly. There's
simply no way something this precise could happen by itself for nearly half an
year, always coming back with the exact same effects after a period of
absence... all despite radical changes to nearly every driver and system
component, which would have no doubt altered the behavior of the initial
problem in some form. Therefore I hope everyone can see why I'm now going with
this theory and greatly considering the option of malicious intent.

I have no idea how the virus (?) could be updated on my computer, as it's
likely not through the package update system directly. However I suspect it's
using a constant series of vulnerabilities in one or more system components,
which should be fixed by the developers if they exist. I would appreciate any
ideas on both how the malicious code might be inserted into the computer, as
well as finding the vulnerability within radeon / Mesa / X11 / etc that it
exploits. Please let me know what your thoughts are!

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[Bug 100306] System randomly freezes or crashes to the login screen, glitches until rebooted

[bugzilla-daemon]

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--- Comment #29 from MirceaKitsune <sonichedgehog_hyperblast00@yahoo.com> ---
An update: The latest reimplementation of the freeze appears to be worse than
all others. My system can now be taken down after only 4 hours of uptime! This
is a huge difference from all previous versions of the crash, which required
that the system had at least been running for a day before it could be crashed.

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[Bug 100306] System randomly freezes or crashes to the login screen, glitches until rebooted

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https://bugs.freedesktop.org/show_bug.cgi?id=100306

--- Comment #30 from MirceaKitsune <sonichedgehog_hyperblast00@yahoo.com> ---
Created attachment 132030
  --> https://bugs.freedesktop.org/attachment.cgi?id=132030&action=edit
Photo of the corrupt image on the screen

I have discovered some very important details today. Everyone following up on
the report, please see this comment!

Recently I realized that a useful test would be to jump into a different run
level once I notice the crash, in order to see how the system behaves there. A
few minutes ago another freeze took place, so I instantly hit Control + Alt +
F1 to go to a console. What I noticed was pretty remarkable and sheds light on
a few aspects:

I could keep typing in the console for nearly 10 seconds, but after that the
exact same behavior still took place (monitor turned itself on and off two
times then the image froze). This time however I was able to toggle the NumLock
led a minute after the crash, while also seeing the HDD led still working; That
means this is not (always) a total system freeze such as a Kernel panic...
instead it appears to be the image output corrupting and staying that way,
freezing only specific components with it (I was still unable to issue a blind
reboot command for instance). To put everything into an approximate timeline,
this is what happened:

00 seconds in: The crash occurs.
02 seconds in: I notice and instantly hit Control + Alt + F1.
05 seconds in: I'm taken to a console where everything works fine: I see the
blinking cursor, can write my login and password, etc.
12 seconds in: Suddenly the monitor turns off and back on several times, then
the image remains frozen in place.

This time however, the screen did not remain turned off or black. Instead it
stayed stuck in a state showing corrupt lines and rectangles of random colors.
I took a photo of my screen with my smartphone, which I attached to this issue.

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[Bug 100306] System randomly freezes or crashes to the login screen, glitches until rebooted

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=100306

--- Comment #31 from MirceaKitsune <sonichedgehog_hyperblast00@yahoo.com> ---
Created attachment 132448
  --> https://bugs.freedesktop.org/attachment.cgi?id=132448&action=edit
Screenshot of "top"

Lots of important new information on this freeze, which was of course ported to
the latest openSUSE Tumbleweed system packages and still works:

First and foremost, the problem does not happen in every session, and this is
not always influenced by updates! During an interval in which I installed
absolutely no relevant package changes, the following has happened: The freeze
occurred after about just 8 hours of uptime... after that I restarted the
machine, but then I had 4 days of uptime with no freeze! This leads me to
believe that certain applications or system actions prepare the system with a
"time bomb", which then causes switching between windows or desktops to produce
the freeze... however I have no way to know what mines the system and what
doesn't yet, as I use too many applications at once to figure out which might
be responsible.

Anyway another crash happened today. Once more I quickly hit Control + Alt + F1
to switch to a different runlevel; This caused the image to become corrupted on
the monitor, however the system remained responsive and didn't actually freeze.
So I went to my mother's computer and logged in via SSH, which indeed still
worked. I was able to issue a reboot command, which caused the image to briefly
unfreeze as the monitor turned on and off a few more times... I could see a few
KDE error messages about applications crashing, before the system actually went
ahead and rebooted successfully! However this is only possible if I switch to a
console quickly enough when noticing the freeze start to happen, if not the
whole machine freezes and not even SSH responds from other devices!

While I was in SSH, I decided to run "top" and take a screenshot of my
processes (while the computer was frozen and with corrupt image stuck on the
screen). I can't tell if anything is out of the ordinary such as a memory leak,
but I'm attaching a screenshot of it here.

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[Bug 100306] System randomly freezes or crashes to the login screen, glitches until rebooted

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https://bugs.freedesktop.org/show_bug.cgi?id=100306

--- Comment #32 from MirceaKitsune <sonichedgehog_hyperblast00@yahoo.com> ---
Thought I'd also post another detail that might be useful, I'm not sure how
much it relates to the freeze but better be safe than sorry; I have the
following two environment variables added to my ~/.profile file, which
basically tell Mesa to post errors to a log file:

export MESA_DEBUG=1
export MESA_LOG_FILE=/home/mircea/.mesa_stderr

There's one reoccurring line which keeps getting printed in there. It's added
periodically with no side effects, but I imagine it could still have some
relation to the trigger of the freeze:

Mesa: User error: GL_INVALID_OPERATION in glTexSubImage2D(invalid texture
image)

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[Bug 100306] System randomly freezes or crashes to the login screen, glitches until rebooted

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--- Comment #33 from MirceaKitsune <sonichedgehog_hyperblast00@yahoo.com> ---
After months of careful testing and experimentation, I have discovered what
seems to be the primary trigger of this freeze at last. It's not what triggers
it per say, but what "rigs" the system and causes it to crash within the course
of the next hours... the actual trigger is alt-tab switching between windows,
or certain desktop effects playing.

The freeze is mined into the system when you disable and re-enable KDE desktop
compositing. If I hit Alt + Shift + F12 to turn off desktop effects, then hit
the key combo to turn them back on... there is a great chance that within a few
hours the crash occurs. If I don't toggle compositing on the run and just leave
it enabled after the system has started, I seem to be fine... this only happens
if I turn it off and back on during runtime. It's uncertain whether anything
else mines the system, but this is almost always what seems to do it for me.

Notice: I use OpenGL 3.1 for desktop compositing. I remember selecting OpenGL
2.0 long ago, but that still caused the freeze at that time. I can't use
Xrender on a daily basis as many effects don't work with it. No other
compositor options seem to affect the problem either.

It would be highly appreciated if at least after this information, the
developers and maintainers could finally look at this issue! It has taken me
months to confirm this as a cause, and I really hope this information
(alongside dozens of comments and logs I have posted) can finally be put to
use.

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[Bug 100306] System randomly freezes or crashes to the login screen, glitches until rebooted

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--- Comment #34 from MirceaKitsune <sonichedgehog_hyperblast00@yahoo.com> ---
Today I discovered that even when not toggling desktop effects at runtime, the
freeze can still be mined into the system. I got a crash after 1 day of uptime,
no toggling of desktop compositing required.

I find it remarkable how the cause of the crash appears to have immediately
changed after me making the comment above yesterday; I tested my theory that
desktop effects are the root for 2 months, yet the moment I publish my
observations the behavior changes in less than a day. This further makes me
concerned that someone might be deliberately programming this crash using
vulnerabilities in system components, solely for how strange this coincidence
is. I'm still waiting for the developers to help investigate this further
whatever the case, as I cannot find any explanation at this point.

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[Bug 100306] System randomly freezes or crashes to the login screen, glitches until rebooted

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https://bugs.freedesktop.org/show_bug.cgi?id=100306

--- Comment #35 from MirceaKitsune <sonichedgehog_hyperblast00@yahoo.com> ---
Created attachment 133243
  --> https://bugs.freedesktop.org/attachment.cgi?id=133243&action=edit
Memtest86 screenshot

To rule out the possibility of a hardware issue, I ran two Memtest86 5.01
sessions from a Clonezilla bootable CD. The first was in the day for 5 hours,
the second was during the night for over 10 hours: The program only registered
3 passes in total, but it did not find any errors. I'll attach a picture just
in case any useful information is printed there.

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[Bug 100306] System randomly freezes or crashes to the login screen, glitches until rebooted

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=100306

--- Comment #36 from MirceaKitsune <sonichedgehog_hyperblast00@yahoo.com> ---
Created attachment 133254
  --> https://bugs.freedesktop.org/attachment.cgi?id=133254&action=edit
Output of "dmesg -w"

This is perhaps the most important piece of information I managed to gather on
the problem thus far. If you have a technical understanding of this data,
please take a look at the log and let us know what it says!

I was able to run a SSH session on my computer from another machine. In it I
left the command "dmesg -w" running. I toggled desktop effects last night to
provoke a crash today, which happened as expected and allowed me to conduct the
test. This is basically what dmesg is seeing in realtime as the system is
crashing.

I can't make sense of the information, but it definitely looks descriptive.
Although the computer seemed completely frozen locally, the output continued
flowing on the other machine printing new information every few seconds. I had
to wait in order to catch some of the red lines in the console.

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[Bug 100306] System randomly freezes or crashes to the login screen, glitches until rebooted

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https://bugs.freedesktop.org/show_bug.cgi?id=100306

--- Comment #37 from MirceaKitsune <sonichedgehog_hyperblast00@yahoo.com> ---
I briefly discussed the above log (output of "dmesg -w") on IRC with someone
who seemed to have an understanding of the issue. They pointed out something
important which I thought to highlight:

The problem appears to start from 'radeon_vm_bo_invalidate' and is most likely
a GPU locking bug. Looking at the stack trace I can see it, alongside explicit
mentions of spin lock / CPU soft lockup / stall on CPU. I've also noticed a
potentially important message, which although marked as a warning seems to
point to a line of source code from the radeon driver:

[58857.640890] WARNING: CPU: 3 PID: 2549 at
../drivers/gpu/drm/radeon/radeon_object.c:84 radeon_ttm_bo_destroy+0xec/0xf0
[radeon]

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[Bug 100306] System randomly freezes or crashes to the login screen, glitches until rebooted

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=100306

--- Comment #38 from MirceaKitsune <sonichedgehog_hyperblast00@yahoo.com> ---
Created attachment 133368
  --> https://bugs.freedesktop.org/attachment.cgi?id=133368&action=edit
Output of "dmesg -w" (full)

Full output of "dmesg -w", recorded by running "dmesg -w > filename.txt". The
previous one was incomplete as it was subject to console line limitations,
cutting off the moment when the crash actually occurs. I left the command
running in a different runlevel; This time the crash didn't shut down the
monitor after switching to it (Control + Alt + F1) so I was able to cleanly
shut down dmesg then issue a normal reboot. I waited there for about 5 minutes
before doing so, to give dmesg time to record as much information as possible.
The crash appears to start at the following lines:

[112873.658950] radeon 0000:03:00.0: ring 4 stalled for more than 10024msec
[112873.658953] radeon 0000:03:00.0: GPU lockup (current fence id
0x000000000072f6bd last fence id 0x000000000072f6c1 on ring 4)

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[Bug 100306] System randomly freezes or crashes to the login screen, glitches until rebooted

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https://bugs.freedesktop.org/show_bug.cgi?id=100306

--- Comment #39 from MirceaKitsune <sonichedgehog_hyperblast00@yahoo.com> ---
I randomly decided to google parts of my dmesg output. I was surprised to
discover that someone else has reported a very similar issue, which looks like
it might have the same root as mine!

https://bugs.freedesktop.org/show_bug.cgi?id=101325

The dmesg output their provided almost perfectly matches my last log, and they
also have a RadeonSI card which further narrows down the problem. The main
difference is that they experience this with Unreal Engine 4 Editor, whereas
for me the trigger is the Plasma desktop.

That report seems to contain a fair amount of logs, so hopefully bringing it
and this together can help produce a solution at long last.

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[Bug 100306] System randomly freezes or crashes to the login screen, glitches until rebooted

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https://bugs.freedesktop.org/show_bug.cgi?id=100306

MirceaKitsune <sonichedgehog_hyperblast00@yahoo.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           See Also|                            |https://bugs.freedesktop.or
                   |                            |g/show_bug.cgi?id=101325

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[Bug 100306] System randomly freezes or crashes to the login screen, glitches until rebooted

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https://bugs.freedesktop.org/show_bug.cgi?id=100306

--- Comment #40 from Alex Deucher <alexdeucher@gmail.com> ---
(In reply to MirceaKitsune from comment #39)
> I randomly decided to google parts of my dmesg output. I was surprised to
> discover that someone else has reported a very similar issue, which looks
> like it might have the same root as mine!
> 
> https://bugs.freedesktop.org/show_bug.cgi?id=101325
> 
> The dmesg output their provided almost perfectly matches my last log, and
> they also have a RadeonSI card which further narrows down the problem. The
> main difference is that they experience this with Unreal Engine 4 Editor,
> whereas for me the trigger is the Plasma desktop.
> 
> That report seems to contain a fair amount of logs, so hopefully bringing it
> and this together can help produce a solution at long last.

All of these bug reports are GPU lockups.  Whether they are the same root cause
or not remains to be seen.

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[Bug 100306] System randomly freezes or crashes to the login screen, glitches until rebooted

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--- Comment #41 from MirceaKitsune <sonichedgehog_hyperblast00@yahoo.com> ---
I have important new information. After yet more weeks of testing, I seem to
have found both of the common triggers for this issue. The crash happens a few
hours after either of the following actions is preformed:

1 - Desktop effects are toggled at runtime. Pressing Alt + Shift + F12 twice to
turn compositing off then back on will mine the system with this crash.

2 - I insert my USB stick or external drive into an USB port, mount it and
access it in Dolphin, then unmount and remove it. A few hours after I've
inserted / removed my drive, the freeze occurs. I suspect this has to do with
the device notifier popping up in the system tray, asking what action to
preform on the device or telling me the device is safe to unplug.

I'm not sure if the themes I'm using might have any relevancy. Considering this
is a graphics problem, I figured I'd share this info as well so others can test
them if they wish. I'm using the Plasma / KWin theme Freeze with the default
Breeze icons / cursor / widget style:

https://www.opendesktop.org/p/998653/
https://www.opendesktop.org/p/1002663/

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[Bug 100306] System randomly freezes or crashes to the login screen, glitches until rebooted

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=100306

--- Comment #42 from MirceaKitsune <sonichedgehog_hyperblast00@yahoo.com> ---
Further more, I suspect I now know what the culprit component is. It's very
likely that the problem lies within Mesa itself, and was introduced in the
switch between 13.0 and 17.0.

This was confirmed by the bug report I linked previously, which I strongly
believe is related to the issue I'm experiencing here: Another person there was
able to verify that their crash happens with Mesa 17 but not 13. Looking at the
dates, I realize that I started experiencing this problem precisely when
openSUSE Tumbleweed upgraded from Mesa 13.0 to 17.0: Mesa 17 landed in early
March 2017, it was a few days later that the issues began, which I then
reported the following week (08 March 2017). See my comment in the other bug
for more info on this:

https://bugs.freedesktop.org/show_bug.cgi?id=101325#c22

I also seem to confirm that the issue only affects RadeonSI cards but not R600:
My laptop has a Mobility Radeon HD 5470 card (R600) whereas my desktop has a
Radeon R7 370 card (RadeonSI). I've been away for two weeks and have been using
my laptop exclusively during this time, which has the exact same OS and
configuration as my desktop. I was able to preform every task I do on my
desktop from my laptop, including the triggers I described above... I have
never experienced this freeze with the laptop.

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[Bug 100306] System randomly freezes or crashes to the login screen, glitches until rebooted

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--- Comment #43 from MirceaKitsune <sonichedgehog_hyperblast00@yahoo.com> ---
I'm sorry for having taken so long to get back to this issue: I needed to be
sure that what I'm mentioning is correct, which at this point took months of
verification to be certain the issue is gone for good.

The problem has finally went away; It has not happened once during 3 months, in
which I was able to achieve well over a week of uptime! It disappeared after
I've preformed the following 3 changes on my system:

- Modifying my system GTK theme.
- Disabling KMix at startup.
- Uninstalling IBus.

I'm convinced the culprit here was IBus... more specifically its system tray
icon. That icon has caused odd glitches in the past, such as making random
menus pop up or crashing. It was likely also causing a graphical glitch that
introduced this infinite GPU loop. As such the ingredients you should need are:

- A GCN 1.0 RadeonSI AMD card, running on the "radeon" driver.
- A KDE (Plasma 5) Linux OS.
- The IBus input system, with the option to show the system tray icon.

If others can reproduce this, please comment on the issue and let us know! If
the problem does not return, I will mostly just be watching this bug from now
on; I don't plan on spending days to do more odd tests... especially after
receiving nearly no support from the FreeDesktop crew for almost an year,
despite giving them a ton of data and how major this issue was.

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GitLab Migration User <gitlab-migration@fdo.invalid> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|REOPENED                    |RESOLVED
         Resolution|---                         |MOVED

--- Comment #44 from GitLab Migration User <gitlab-migration@fdo.invalid> ---
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been
closed from further activity.

You can subscribe and participate further through the new bug through this link
to our GitLab instance: https://gitlab.freedesktop.org/mesa/mesa/issues/1262.

-- 
You are receiving this mail because:
You are the assignee for the bug.

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