[Bug 106940] Black screen on KMS with 4.18.0-rc1 with Kaveri+Topaz, amdgpu, dc=1

[Bug 106940] Black screen on KMS with 4.18.0-rc1 with Kaveri+Topaz, amdgpu, dc=1

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106940

            Bug ID: 106940
           Summary: Black screen on KMS with 4.18.0-rc1 with Kaveri+Topaz,
                    amdgpu, dc=1
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: blocker
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: nmset@netcourrier.com

Since kernel 4.18.0-rc1, my laptop boots in a black screen with Kaveri+Topaz
GPUs, Xorg 1.20.0. The systems boots normally in the background. I can log in
blindly in sddm, press CTRL+ALT+DEL when KDE has booted invisibly and shutdown
the laptop with ENTER. I'm using the following options :

install radeon /bin/false
options amdgpu dc=1 si_support=1 cik_support=1
options radeon si_support=0 cik_support=0

Everything was just working until 4.18.0-rc1.

If I boot on another partition, I can inspect Xorg.0.log of the main partition,
which contains no errors.

With no options at all, or if dc=0, I can get a KDE usable session, excepting
suspend failing quite often.

Thanks for any input to resolve this. I can give more information upon your
instructions.

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[Bug 106940] Black screen on KMS with 4.18.0-rc1 with Kaveri+Topaz, amdgpu, dc=1

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106940

--- Comment #1 from SET <nmset@netcourrier.com> ---
This happens on both early and late KMS (Arch Linux).

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[Bug 106940] Black screen on KMS with 4.18.0-rc1 with Kaveri+Topaz, amdgpu, dc=1

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106940

Michel Dänzer <michel@daenzer.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |harry.wentland@amd.com

--- Comment #2 from Michel Dänzer <michel@daenzer.net> ---
Can you bisect?

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[Bug 106940] Black screen on KMS with 4.18.0-rc1 with Kaveri+Topaz, amdgpu, dc=1

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106940

--- Comment #3 from Michel Dänzer <michel@daenzer.net> ---
Please attach the following for 4.18.0-rc1 and the last working kernel: The
dmesg output, the .config file and the Xorg log file.

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[Bug 106940] Black screen on KMS with 4.18.0-rc1 with Kaveri+Topaz, amdgpu, dc=1

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106940

--- Comment #4 from SET <nmset@netcourrier.com> ---
Created attachment 140195
  --> https://bugs.freedesktop.org/attachment.cgi?id=140195&action=edit
Bad .config

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[Bug 106940] Black screen on KMS with 4.18.0-rc1 with Kaveri+Topaz, amdgpu, dc=1

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106940

--- Comment #5 from SET <nmset@netcourrier.com> ---
Created attachment 140197
  --> https://bugs.freedesktop.org/attachment.cgi?id=140197&action=edit
Bad dmesg

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[Bug 106940] Black screen on KMS with 4.18.0-rc1 with Kaveri+Topaz, amdgpu, dc=1

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106940

--- Comment #6 from SET <nmset@netcourrier.com> ---
Created attachment 140198
  --> https://bugs.freedesktop.org/attachment.cgi?id=140198&action=edit
Bad Xorg log

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[Bug 106940] Black screen on KMS with 4.18.0-rc1 with Kaveri+Topaz, amdgpu, dc=1

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106940

--- Comment #7 from SET <nmset@netcourrier.com> ---
Created attachment 140199
  --> https://bugs.freedesktop.org/attachment.cgi?id=140199&action=edit
Good .config

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[Bug 106940] Black screen on KMS with 4.18.0-rc1 with Kaveri+Topaz, amdgpu, dc=1

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106940

--- Comment #8 from SET <nmset@netcourrier.com> ---
Created attachment 140200
  --> https://bugs.freedesktop.org/attachment.cgi?id=140200&action=edit
Good dmesg

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[Bug 106940] Black screen on KMS with 4.18.0-rc1 with Kaveri+Topaz, amdgpu, dc=1

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106940

--- Comment #9 from SET <nmset@netcourrier.com> ---
Created attachment 140201
  --> https://bugs.freedesktop.org/attachment.cgi?id=140201&action=edit
Good Xorg log

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[Bug 106940] Black screen on KMS with 4.18.0-rc1 with Kaveri+Topaz, amdgpu, dc=1

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106940

--- Comment #10 from SET <nmset@netcourrier.com> ---
Created attachment 140202
  --> https://bugs.freedesktop.org/attachment.cgi?id=140202&action=edit
Good and bad git commits

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[Bug 106940] Black screen on KMS with 4.18.0-rc1 with Kaveri+Topaz, amdgpu, dc=1

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106940

--- Comment #11 from SET <nmset@netcourrier.com> ---
I could bisect incompletely, until this error happens: 

../lib/str_error_r.c:25:3: error: passing argument 1 to restrict-qualified
parameter aliases with argument 5 [-Werror=restrict]

So far :

bad : ce397d215ccd07b8ae3f71db689aedb85d56ab40
bad : 1c8c5a9d38f607c0b6fd12c91cbe1a4418762a21
bad : 135c5504a600ff9b06e321694fbcac78a9530cd4
bad : 315852b422972e6ebb1dfddaadada09e46a2681a

testing : 13b75aac5dd9a6448417769c43d21b2343ce1cc8 - can't compile

good : 6f2db7dc901a1b89fbc50f7b38f0f7ee17205703
good : e71a82d8c1fa28ab048227df929e4f07d98f1656
good : 5231804cf9e584f3e7e763a0d6d2fffe011c1bce
good : 29dcea88779c856c7dc92040a0c01233263101d4

In all the good commits, CONFIG_DRM_AMD_DC_PRE_VEGA was set to y. In all the
bad commits, CONFIG_DRM_AMD_DC_PRE_VEGA is no longer an avilable option.

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[Bug 106940] Black screen on KMS with 4.18.0-rc1 with Kaveri+Topaz, amdgpu, dc=1

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106940

--- Comment #12 from Felix Schwarz <felix.schwarz@oss.schwarz.eu> ---
use "gi(In reply to SET from comment #11)
> I could bisect incompletely, until this error happens: 
> 
> ../lib/str_error_r.c:25:3: error: passing argument 1 to restrict-qualified
> parameter aliases with argument 5 [-Werror=restrict]

use "git bisect skip" for that version.

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[Bug 106940] Black screen on KMS with 4.18.0-rc1 with Kaveri+Topaz, amdgpu, dc=1

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106940

--- Comment #13 from SET <nmset@netcourrier.com> ---
I'm giving up on bisecting, it's getting out of control, sorry.

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[Bug 106940] Black screen on KMS with 4.18.0-rc1 with Kaveri+Topaz, amdgpu, dc=1

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106940

--- Comment #14 from Michel Dänzer <michel@daenzer.net> ---
(In reply to SET from comment #13)
> I'm giving up on bisecting, it's getting out of control, sorry.

What's the problem?

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[Bug 106940] Black screen on KMS with 4.18.0-rc1 with Kaveri+Topaz, amdgpu, dc=1

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106940

--- Comment #15 from SET <nmset@netcourrier.com> ---
After narrowing good and bad commits between june 4th and 6th, it started to
test commits in april, then december. Some commits don't compile and must be
skipped. This is going endless, can't continue.

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[Bug 106940] Black screen on KMS with 4.18.0-rc1 with Kaveri+Topaz, amdgpu, dc=1

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106940

--- Comment #16 from Michel Dänzer <michel@daenzer.net> ---
(In reply to SET from comment #15)
> After narrowing good and bad commits between june 4th and 6th, it started to
> test commits in april, then december.

That's normal, due to the non-linear Git history of the Linux kernel.

> Some commits don't compile and must be skipped. This is going endless, can't
> continue.

It will finish eventually.

Can you attach the current output of

 git bisect log

and tell us the commit it wants to test next?

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[Bug 106940] Black screen on KMS with 4.18.0-rc1 with Kaveri+Topaz, amdgpu, dc=1

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106940

--- Comment #17 from SET <nmset@netcourrier.com> ---
This is where I'm up to :

git bisect start
# bad: [135c5504a600ff9b06e321694fbcac78a9530cd4] Merge tag
'drm-next-2018-06-06-1' of git://anongit.freedesktop.org/drm/drm
git bisect bad 135c5504a600ff9b06e321694fbcac78a9530cd4
# good: [c76f0b2cc2f1be1a8a20f0fe2c0f30919bc559fb] Merge tag
'drm-amdkfd-next-2018-05-14' of git://people.freedesktop.org/~gabbayo/linux
into drm-next
git bisect good c76f0b2cc2f1be1a8a20f0fe2c0f30919bc559fb
# good: [92400b8c8b42e53abb0fcb4ac75cb85d4177a891] Merge branch
'locking-core-for-linus' of
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect good 92400b8c8b42e53abb0fcb4ac75cb85d4177a891
# good: [07c4dd3435aa387d3b58f4e941dc516513f14507] Merge tag 'usb-4.18-rc1' of
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
git bisect good 07c4dd3435aa387d3b58f4e941dc516513f14507
# bad: [cac18c82e0c5b39b69648942576dbd1d6f9d056e] drm/amdgpu: Specify vega20
uvd firmware
git bisect bad cac18c82e0c5b39b69648942576dbd1d6f9d056e
# bad: [cac18c82e0c5b39b69648942576dbd1d6f9d056e] drm/amdgpu: Specify vega20
uvd firmware
git bisect bad cac18c82e0c5b39b69648942576dbd1d6f9d056e
# bad: [cac18c82e0c5b39b69648942576dbd1d6f9d056e] drm/amdgpu: Specify vega20
uvd firmware
git bisect bad cac18c82e0c5b39b69648942576dbd1d6f9d056e
# bad: [cac18c82e0c5b39b69648942576dbd1d6f9d056e] drm/amdgpu: Specify vega20
uvd firmware
git bisect bad cac18c82e0c5b39b69648942576dbd1d6f9d056e
# skip: [7ab3fdde04218c4733e96712b651751c413d51c3] drm/amd/display: Update MST
edid property every time
git bisect skip 7ab3fdde04218c4733e96712b651751c413d51c3
# skip: [e930793280799e66c3197e2ee6e70b1129f8aa12] drm/amdgpu: add VEGAM pci
ids
git bisect skip e930793280799e66c3197e2ee6e70b1129f8aa12
# good: [53f071e19d566e7d0a4eada1bd8313a4cdb660a4] Merge drm/drm-next into
drm-intel-next-queued
git bisect good 53f071e19d566e7d0a4eada1bd8313a4cdb660a4
# good: [53f071e19d566e7d0a4eada1bd8313a4cdb660a4] Merge drm/drm-next into
drm-intel-next-queued
git bisect good 53f071e19d566e7d0a4eada1bd8313a4cdb660a4
# skip: [ba8f7ad0e5b25851299cd45a63b57d843e50b577] drm/amdgpu: add VEGAM UVD
firmware support
git bisect skip ba8f7ad0e5b25851299cd45a63b57d843e50b577
# skip: [d10fb4a6f382474025f326bf90ee3b64396486ea] drm/amd/pp: Change
pstate_clk frequency unit to 10KHz on Rv
git bisect skip d10fb4a6f382474025f326bf90ee3b64396486ea

I'll keep trying, hoping it ends before it is fixed by some other changes.

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[Bug 106940] Black screen on KMS with 4.18.0-rc1 with Kaveri+Topaz, amdgpu, dc=1

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106940

--- Comment #18 from Michel Dänzer <michel@daenzer.net> ---
What's the compile error you're getting with the current commit?

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[Bug 106940] Black screen on KMS with 4.18.0-rc1 with Kaveri+Topaz, amdgpu, dc=1

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106940

--- Comment #19 from SET <nmset@netcourrier.com> ---
It's the same error for every commit I had to skip :

../lib/str_error_r.c:25:3: error: passing argument 1 to restrict-qualified
parameter aliases with argument 5 [-Werror=restrict]
   snprintf(buf, buflen, "INTERNAL ERROR: strerror_r(%d, %p, %zd)=%d", errnum,
buf, buflen, err);
   ^~~~~~~~
cc1 : all warnings are treated as errors (this line is translated by me)

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[Bug 106940] Black screen on KMS with 4.18.0-rc1 with Kaveri+Topaz, amdgpu, dc=1

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106940

--- Comment #20 from Alex Deucher <alexdeucher@gmail.com> ---
It's a bug in new gcc.  You can apply this patch as a workaround:
https://github.com/torvalds/linux/commit/854e55ad289ef8888e7991f0ada85d5846f5afb9#diff-0b8e91d818ef68ac30763b79d9fabbad

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[Bug 106940] Black screen on KMS with 4.18.0-rc1 with Kaveri+Topaz, amdgpu, dc=1

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106940

--- Comment #21 from SET <nmset@netcourrier.com> ---
After applying the patch, bisection move on reasonably. See the attached file
bisect.log.

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[Bug 106940] Black screen on KMS with 4.18.0-rc1 with Kaveri+Topaz, amdgpu, dc=1

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106940

--- Comment #22 from SET <nmset@netcourrier.com> ---
Created attachment 140251
  --> https://bugs.freedesktop.org/attachment.cgi?id=140251&action=edit
Bisection results

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[Bug 106940] Black screen on KMS with 4.18.0-rc1 with Kaveri+Topaz, amdgpu, dc=1

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106940

Michel Dänzer <michel@daenzer.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #140251|text/x-log                  |text/plain
          mime type|                            |

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[Bug 106940] Black screen on KMS with 4.18.0-rc1 with Kaveri+Topaz, amdgpu, dc=1

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106940

--- Comment #23 from Server Angels <seany@seanyseansean.com> ---
Just to add - I had the same experience with rc1 on a Vega / Ryzen system.
System is responsive over the network but black screen. 

This is with Fedora and rawhide kernels. 

What exact debug would be useful apart from what OP provided?

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[Bug 106940] Black screen on KMS with 4.18.0-rc1 with Kaveri+Topaz, amdgpu, dc=1

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https://bugs.freedesktop.org/show_bug.cgi?id=106940

--- Comment #24 from Alex Deucher <alexdeucher@gmail.com> ---
first bad commit: [f0c0761b38ac30b04d4fed436ff10e894ec0e525] drm/amd/display:
Use dig enable to determine fast boot optimization.

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[Bug 106940] Black screen on KMS with 4.18.0-rc1 with Kaveri+Topaz, amdgpu, dc=1

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--- Comment #25 from Server Angels <seany@seanyseansean.com> ---
FYI this bug is still present in rc2.

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[Bug 106940] Black screen on KMS with 4.18.0-rc1 with Kaveri+Topaz, amdgpu, dc=1

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https://bugs.freedesktop.org/show_bug.cgi?id=106940

--- Comment #26 from Server Angels <seany@seanyseansean.com> ---
This is still not fixed with rc7 / Fedora Rawhide kernel. Is there any chance
this patch could be reverted, as it has made 4.18 unusable with Vega10?

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[Bug 106940] Black screen on KMS with 4.18.0-rc1 with Kaveri+Topaz, amdgpu, dc=1

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https://bugs.freedesktop.org/show_bug.cgi?id=106940

--- Comment #27 from Przemek <soprwa@gmail.com> ---
Now it is in stable 4.18.
Same situation here. Gentoo ~amd64 on Lenovo G50-45 A6-6310 APU with R4
Mullins.

Laptop monitor is off (eDP), but there is picture on external one, connected
through hdmi port.

Reverting troublesome commit (drm/amd/display: Use dig enable to determine fast
boot optimization.) make things work again.

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[Bug 106940] Black screen on KMS with 4.18.0-rc1 with Kaveri+Topaz, amdgpu, dc=1

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https://bugs.freedesktop.org/show_bug.cgi?id=106940

Alex Deucher <alexdeucher@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #140198|text/x-log                  |text/plain
          mime type|                            |

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[Bug 106940] Black screen on KMS with 4.18.0-rc1 with Kaveri+Topaz, amdgpu, dc=1

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106940

--- Comment #28 from Alex Deucher <alexdeucher@gmail.com> ---
Created attachment 141123
  --> https://bugs.freedesktop.org/attachment.cgi?id=141123&action=edit
patch to test

Does this patch fix the issue?

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[Bug 106940] Black screen on KMS with 4.18.0-rc1 with Kaveri+Topaz, amdgpu, dc=1

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106940

--- Comment #29 from SET <nmset@netcourrier.com> ---
The patch allows to view a normal booting.

However, the laptop hangs on suspend. Please see dmesg attachement. Switching
back to radeon.

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[Bug 106940] Black screen on KMS with 4.18.0-rc1 with Kaveri+Topaz, amdgpu, dc=1

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106940

--- Comment #30 from Server Angels <seany@seanyseansean.com> ---
Actually rc8 from fedora/rawhide fixed it for me. I wasn't sure at first as the
initial upgrade didn't work, but a full power off / power off then did, which
was bizarre.

I did add the kernel option amdgpu.dc=1 to make sure it was using the correct
code. All been fine since.

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[Bug 106940] Black screen on KMS with 4.18.0-rc1 with Kaveri+Topaz, amdgpu, dc=1

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https://bugs.freedesktop.org/show_bug.cgi?id=106940

--- Comment #31 from SET <nmset@netcourrier.com> ---
Created attachment 141124
  --> https://bugs.freedesktop.org/attachment.cgi?id=141124&action=edit
dmesg output after patch

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[Bug 106940] Black screen on KMS with 4.18.0-rc1 with Kaveri+Topaz, amdgpu, dc=1

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106940

--- Comment #32 from Alex Deucher <alexdeucher@gmail.com> ---
(In reply to Server Angels from comment #30)
> Actually rc8 from fedora/rawhide fixed it for me. I wasn't sure at first as
> the initial upgrade didn't work, but a full power off / power off then did,
> which was bizarre.
> 
> I did add the kernel option amdgpu.dc=1 to make sure it was using the
> correct code. All been fine since.

Are you saying it the black screen is fixed with rc8 or that rc8 fixes the
suspend issue and the patch is still required to fix the black screen?

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[Bug 106940] Black screen on KMS with 4.18.0-rc1 with Kaveri+Topaz, amdgpu, dc=1

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106940

--- Comment #33 from SET <nmset@netcourrier.com> ---
(In reply to Alex Deucher from comment #32)
> (In reply to Server Angels from comment #30)
> > Actually rc8 from fedora/rawhide fixed it for me. I wasn't sure at first as
> > the initial upgrade didn't work, but a full power off / power off then did,
> > which was bizarre.
> > 
> > I did add the kernel option amdgpu.dc=1 to make sure it was using the
> > correct code. All been fine since.
> 
> Are you saying it the black screen is fixed with rc8 or that rc8 fixes the
> suspend issue and the patch is still required to fix the black screen?

You are mentioning the 'suspend issue' which is not mentioned in comment #30.
Just in case it's a click mistake :

For me, the black screen issue is fixed with the patch applied to -rc8. Without
the patch to -rc8, the black screen issue is still here.
Then there is the suspend issue, which is not related to this thread.

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[Bug 106940] Black screen on KMS with 4.18.0-rc1 with Kaveri+Topaz, amdgpu, dc=1

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106940

--- Comment #34 from Przemek <soprwa@gmail.com> ---
(In reply to Alex Deucher from comment #28)
> Created attachment 141123 [details] [review]
> patch to test
> 
> Does this patch fix the issue?

Yes, this patch resolves "eDP display turned off on boot time" issue on my
machine, kernel - gentoo 4.18.1.
Thanks Alex,
Przemek.

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[Bug 106940] Black screen on KMS with 4.18.0-rc1 with Kaveri+Topaz, amdgpu, dc=1

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106940

--- Comment #35 from Alex Deucher <alexdeucher@gmail.com> ---
does the screen light up properly on my amd-staging-drm-next branch?
https://cgit.freedesktop.org/~agd5f/linux/log/?h=amd-staging-drm-next

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[Bug 106940] Black screen on KMS with 4.18.0-rc1 with Kaveri+Topaz, amdgpu, dc=1

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106940

--- Comment #36 from Server Angels <seany@seanyseansean.com> ---
To be clear - rc8 (without any other patches) resolves my black screen at boot
time issue.

I did have a black screen when coming out of suspend issue, which is now
resolved, but I didn't think this was driver related as it also happened in
Windows on the same machine. There has been a AMD Windows driver update
recently too, so maybe the issue was resolved on both?

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[Bug 106940] Black screen on KMS with 4.18.0-rc1 with Kaveri+Topaz, amdgpu, dc=1

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106940

--- Comment #37 from Przemek <soprwa@gmail.com> ---
(In reply to Alex Deucher from comment #35)
> does the screen light up properly on my amd-staging-drm-next branch?
> https://cgit.freedesktop.org/~agd5f/linux/log/?h=amd-staging-drm-next

No, it doesn't, moreover, I have kernel oops with amd-staging-drm-next, but
have no idea if I should open another bug report or not.

OOPS log attached (from enablig amd modesetting).

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[Bug 106940] Black screen on KMS with 4.18.0-rc1 with Kaveri+Topaz, amdgpu, dc=1

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106940

--- Comment #38 from Przemek <soprwa@gmail.com> ---
Created attachment 141145
  --> https://bugs.freedesktop.org/attachment.cgi?id=141145&action=edit
kernel ooops with attached patch on amd-staging-drm-next branch.

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[Bug 106940] Black screen on KMS with 4.18.0-rc1 with Kaveri+Topaz, amdgpu, dc=1

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106940

--- Comment #39 from Alex Deucher <alexdeucher@gmail.com> ---
(In reply to Przemek from comment #37)
> (In reply to Alex Deucher from comment #35)
> > does the screen light up properly on my amd-staging-drm-next branch?
> > https://cgit.freedesktop.org/~agd5f/linux/log/?h=amd-staging-drm-next
> 
> No, it doesn't, moreover, I have kernel oops with amd-staging-drm-next, but
> have no idea if I should open another bug report or not.

Yes, please file a new bug for that.  thanks.

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[Bug 106940] Black screen on KMS with 4.18.0-rc1 with Kaveri+Topaz, amdgpu, dc=1

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106940

Alex Deucher <alexdeucher@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #141123|0                           |1
        is obsolete|                            |

--- Comment #40 from Alex Deucher <alexdeucher@gmail.com> ---
Created attachment 141151
  --> https://bugs.freedesktop.org/attachment.cgi?id=141151&action=edit
disable eDP optimization on DCE8

Not sure why this is causing a problem on DCE8.  Try this patch.

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[Bug 106940] Black screen on KMS with 4.18.0-rc1 with Kaveri+Topaz, amdgpu, dc=1

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106940

--- Comment #41 from Andrey Arapov <andrey.arapov@nixaid.com> ---
Not sure if that helps, but could you try reverting this commit?
https://github.com/torvalds/linux/commit/e03fd3f300f6184c1264186a4c815e93bf658abb

My MacBookPro Mid 2017 started to experience the black screen issue since
4.18.0-rc1 up to 4.19.0-rc4 (and probably higher). Having that commit reverted
has resolved the black screen issue I had, allowing me to use amdgpu.dc=1
again. 


Refs:

- https://github.com/Dunedan/mbp-2016-linux/issues/73#issuecomment-422397681

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[Bug 106940] Black screen on KMS with 4.18.0-rc1 with Kaveri+Topaz, amdgpu, dc=1

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106940

--- Comment #42 from SET <nmset@netcourrier.com> ---
(In reply to Andrey Arapov from comment #41)
> Not sure if that helps, but could you try reverting this commit?
> https://github.com/torvalds/linux/commit/
> e03fd3f300f6184c1264186a4c815e93bf658abb
> 

Reverted that commit, still a black screen with 4.19-rc4 in the above context.
Using radeon for a useful laptop.

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[Bug 106940] Black screen on KMS with 4.18.0-rc1 with Kaveri+Topaz, amdgpu, dc=1

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106940

--- Comment #43 from Nicholas Kazlauskas <nicholas.kazlauskas@amd.com> ---
Did you get around to trying Alex's patch? Does the black screen still occur
with it?

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[Bug 106940] Black screen on KMS with 4.18.0-rc1 with Kaveri+Topaz, amdgpu, dc=1

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106940

--- Comment #44 from SET <nmset@netcourrier.com> ---
(In reply to Nicholas Kazlauskas from comment #43)
> Did you get around to trying Alex's patch? Does the black screen still occur
> with it?

Please see comment #29.

No black screen with the patch. But suspend will subsequently fail.

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[Bug 106940] Black screen on KMS with 4.18.0-rc1 with Kaveri+Topaz, amdgpu, dc=1

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106940

Martin Peres <martin.peres@free.fr> changed:

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

--- Comment #45 from Martin Peres <martin.peres@free.fr> ---
-- 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/drm/amd/issues/417.

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