[Bug 111868] New: xorg with nouveau crash when starting mate-session in debian 10

[Bug 111868] New: xorg with nouveau crash when starting mate-session in debian 10

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https://bugs.freedesktop.org/show_bug.cgi?id=111868

            Bug ID: 111868
           Summary: xorg with nouveau crash when starting mate-session in
                    debian 10
           Product: xorg
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: not set
          Priority: not set
         Component: Driver/nouveau
          Assignee: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
          Reporter: alain.prignet-oQvnLCQn66E@public.gmane.org
        QA Contact: xorg-team-go0+a7rfsptAfugRpC6u6w@public.gmane.org

Created attachment 145592
  --> https://bugs.freedesktop.org/attachment.cgi?id=145592&action=edit
xorg.0.log with xorg backtrace

Geforce 2 since debian 10 crash when starting mate-session (but not with
xfce4-session or showing gdm3 or lightdm).

I have also downgrade xorg-server-core to debian 9 and I get the same crash.
All was working with debian 9 (and 4.9 kernel).

I have tried 4.19 and 4.9 kernel : both crash.

If I launch mate-session from command line in a xfce4-session, mate-session
works.

The backtrace of Xorg.0.log is the same as
https://termbin.com/7avc
I put it in attachment since I have not the non working computer with me. Later
I will give a working Xorg.0.log (with xfce4) and the non working (with mate).

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[Bug 111868] xorg with nouveau crash when starting mate-session in debian 10

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https://bugs.freedesktop.org/show_bug.cgi?id=111868

--- Comment #1 from Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> ---
You have a bigger problem ... your GeForce2 is reporting as a Riva TNT2!

That's a weird stack trace -- looks like it got corrupted. The "nouveau"
address doesn't map to a function at all, and the
present_register_complete_notify frames appear questionable to me.

How much debugging are you able to do? Do you have a second computer and know
how to work gdb?

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[Bug 111868] xorg with nouveau crash when starting mate-session in debian 10

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https://bugs.freedesktop.org/show_bug.cgi?id=111868

--- Comment #2 from alain.prignet-oQvnLCQn66E@public.gmane.org ---
Thanks for your answer.

Sorry, I give you this "pastebin" since I'm away from my computer.
This log has a Riva TNT2, but mine a Geforce 2. But they gives the
"same" backtrace.

I will give you the two log files (mate-session and xfce4-session)
from my computer in few days.

gdb is difficult for me, I will need help. I'm not sure if I need two
computers since I can still use the computer in console mode after the
crash. The crash does not freeze the computer : with lightdm, I get
the infinite connect loop.

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[Bug 111868] xorg with nouveau crash when starting mate-session in debian 10

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https://bugs.freedesktop.org/show_bug.cgi?id=111868

--- Comment #3 from alain.prignet-oQvnLCQn66E@public.gmane.org ---
Le 30/09/2019 a 12:06:01 +0000, bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ@public.gmane.org a ecrit :
> https://bugs.freedesktop.org/show_bug.cgi?id=111868
> 
> --- Comment #1 from Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> ---
> You have a bigger problem ... your GeForce2 is reporting as a Riva TNT2!

Sorry, I give you this "pastebin" since I'm away from my computer.
This log has a Riva TNT2, but mine a Geforce 2. But they gives the
"same" backtrace.

> 
> That's a weird stack trace -- looks like it got corrupted. The "nouveau"
> address doesn't map to a function at all, and the
> present_register_complete_notify frames appear questionable to me.

So I will give you the two log file from my computer in few days.

> 
> How much debugging are you able to do? Do you have a second computer and know
> how to work gdb?
> 

gdb is difficult for me, I will need help. I'm not sure I need two
computer since I can still use the computer in console mode after the
crash. The crash does not freeze the computer : with lightdm, I get
the infinite connect loop.

Thanks,

alain prignet

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[Bug 111868] xorg with nouveau crash when starting mate-session in debian 10

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https://bugs.freedesktop.org/show_bug.cgi?id=111868

--- Comment #4 from Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> ---
OK, alternatively do you have a fool-proof sequence of steps to reproduce this?
You originally made it sound like mate-session was the thing, but but then in
later comments you say that it's actually fine.

Like let's say I run xinit and then run mate-session from within the terminal
-- is that enough? (I'd like to avoid dealing with gdm3 as much as possible.)

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[Bug 111868] xorg with nouveau crash when starting mate-session in debian 10

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https://bugs.freedesktop.org/show_bug.cgi?id=111868

--- Comment #5 from alain.prignet-oQvnLCQn66E@public.gmane.org ---
Yes I have a fool-proof sequence to reproduce it, even not using gdm3 or
lightdm.

I can reproduce it using "startx" and an .xinitrc containing only
"exec mate-session". Since the computer does not freeze, I can reproducing at
demand.

(The bug is not show when having in .xinitrc "exec xfce4-session", or when
using gdm3 or lightdm with xfce, even if launching mate-session during the
xfce4 session)

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[Bug 111868] xorg with nouveau crash when starting mate-session in debian 10

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--- Comment #6 from Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> ---
Great, thanks. I'll work on reproducing locally.

I think we spoke on IRC a while back -- sorry I didn't actually get around to
investigating -- you said that it only reproduced consistently with like TNT2,
not with the later GPUs like NV34 (which I happen to have plugged in, which is
why I'm asking).

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[Bug 111868] xorg with nouveau crash when starting mate-session in debian 10

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--- Comment #7 from alain.prignet-oQvnLCQn66E@public.gmane.org ---
I have a very old Geforce 2. But according to the file I found on termbin, it
is the same with a Riva TNT2. This is the only nvidia card I have. My other are
Intel.

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--- Comment #8 from alain.prignet-oQvnLCQn66E@public.gmane.org ---
Created attachment 145664
  --> https://bugs.freedesktop.org/attachment.cgi?id=145664&action=edit
startx with .xinitrc "exec mate-session". it fails.

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[Bug 111868] xorg with nouveau crash when starting mate-session in debian 10

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https://bugs.freedesktop.org/show_bug.cgi?id=111868

--- Comment #9 from alain.prignet-oQvnLCQn66E@public.gmane.org ---
Created attachment 145665
  --> https://bugs.freedesktop.org/attachment.cgi?id=145665&action=edit
startx with .xinitrc "exec xfce4-session". it works.

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[Bug 111868] xorg with nouveau crash when starting mate-session in debian 10

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--- Comment #10 from alain.prignet-oQvnLCQn66E@public.gmane.org ---
Above the 2 "real" log files.

In console mode, (real user, not root), I launch startx with .xinitrc as
describe.

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[Bug 111868] xorg with nouveau crash when starting mate-session in debian 10

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--- Comment #11 from Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> ---
This patch may help:

https://patchwork.freedesktop.org/patch/335616/

I believe that primarily GPUs with 32MB of VRAM (or less) would be affected.
However it may also have a rarer effect on larger-VRAM devices.

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[Bug 111868] xorg with nouveau crash when starting mate-session in debian 10

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Martin Peres <martin.peres-GANU6spQydw@public.gmane.org> changed:

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

--- Comment #12 from Martin Peres <martin.peres-GANU6spQydw@public.gmane.org> ---
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