[Bug 91202] output to DVI-I is blank

[Bug 91202] output to DVI-I is blank

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=91202

            Bug ID: 91202
           Summary: output to DVI-I is blank
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: bpaterni@gmail.com

Created attachment 116902
  --> https://bugs.freedesktop.org/attachment.cgi?id=116902&action=edit
dmesg for e965b8ce4215ac2b22b23ffc8a8dfbae964b9496

I have a radeon r9 285 (tonga) and I'm trying to run dual DVI displays via the
new AMDGPU driver. The problem I'm having though is that the display connected
to the DVI-I output goes blank during drm initialization on boot, and
thereafter never 'recovers'. If I plug either DVI-D or DVI-I in individually,
however, and disconnect the other on a fresh boot, either outputs work just
fine. Additionally, dual displays do work if I use any combination of DVI-D,
HDMI, or DisplayPort; which leads me to believe that the problem has something
to do with how amdgpu is handling output to DVI-I or a hardware problem.
Hopefully it is not the latter.

Please let me know if there is anything I can do to help debug this problem!

I'm using Debian unstable, with the latest linux kernel compiled from git
mainline (e965b8ce4215ac2b22b23ffc8a8dfbae964b9496)

dmesg and Xorg log should be attached.

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[Bug 91202] output to DVI-I is blank

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https://bugs.freedesktop.org/show_bug.cgi?id=91202

--- Comment #1 from Brian Paterni <bpaterni@gmail.com> ---
Created attachment 116903
  --> https://bugs.freedesktop.org/attachment.cgi?id=116903&action=edit
xorg log

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[Bug 91202] output to DVI-I is blank

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https://bugs.freedesktop.org/show_bug.cgi?id=91202

--- Comment #2 from Brian Paterni <bpaterni@gmail.com> ---
Up to now I haven't attempted this, but I just tried changing display modes
with xrandr, and this does result in a working display on DVI-I. That is, if
the mode is anything other than the preferred 1920x1080. If I try to switch
back to 1920x1080, the display goes blank and returns to standby mode.

Would anyone happen to know why preferred mode would have problems while other
modes seem to display just fine?

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[Bug 91202] output to DVI-I is blank

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https://bugs.freedesktop.org/show_bug.cgi?id=91202

--- Comment #3 from Brian Paterni <bpaterni@gmail.com> ---
Created attachment 117375
  --> https://bugs.freedesktop.org/attachment.cgi?id=117375&action=edit
xrandr --verbose output with DVI-I-0 in the nonworking 1920x1080 mode

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[Bug 91202] output to DVI-I is blank

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https://bugs.freedesktop.org/show_bug.cgi?id=91202

--- Comment #4 from Brian Paterni <bpaterni@gmail.com> ---
Created attachment 117376
  --> https://bugs.freedesktop.org/attachment.cgi?id=117376&action=edit
xrandr --verbose output with DVI-I-0 in a working 1680x1050 mode

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[Bug 91202] output to DVI-I is blank

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https://bugs.freedesktop.org/show_bug.cgi?id=91202

--- Comment #5 from Brian Paterni <bpaterni@gmail.com> ---
Just a little update on this bug.

Still experiencing this problem with the latest upstream kernel code (up to
33b40178cb3bd75294d1a758b3f509a0d38682ab)

It was mentioned on irc that the output of xrandr --verbose may be useful. So
I've also attached two additional files with DVI-I-0 in either a
working/nonworking state.

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[Bug 91202] output to DVI-I is blank

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https://bugs.freedesktop.org/show_bug.cgi?id=91202

--- Comment #6 from Mathias Tillman <master.homer@gmail.com> ---
I know this may not be a very useful comment, but I can confirm that this bug
also happens on 4.2-rc7, and that changing the display resolution via xrandr
makes it come back.
I set up a script that's run when X11 is started that changes the resolution
(and then back again) as a temporary workaround.

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[Bug 91202] output to DVI-I is blank

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https://bugs.freedesktop.org/show_bug.cgi?id=91202

--- Comment #7 from Guido Winkelmann <guido-xorgbugs@unknownsite.de> ---
Can confirm the problem with an R9 285 chip (graphics card is called ASUS
STRIX-R9285-DC2OC-2GD5).

The monitor receives no input (switching to power saving mode) when run at its
preferred resolution of 2560x1440. It will work with any other resolution, but
switching it back 2560x1440 will disable it again.

This is with Kernel 4.3 and the amdgpu driver from today's git master.

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[Bug 91202] Output to DVI-I (or DVI-D) is blank on Tonga (R9 285 and 380X) with multiple monitors

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=91202

Vedran Miletić <rivanvx@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|output to DVI-I is blank    |Output to DVI-I (or DVI-D)
                   |                            |is blank on Tonga (R9 285
                   |                            |and 380X) with multiple
                   |                            |monitors

--- Comment #8 from Vedran Miletić <rivanvx@gmail.com> ---
I am using XFX R9 380X: 01:00.0 VGA compatible controller [0300]: Advanced
Micro Devices, Inc. [AMD/ATI] Amethyst XT [Radeon R9 M295X Mac Edition / R9
380X] [1002:6938] (rev f1)

This bug affects me as well. Interesting part is this: when I plug in just
DVI-I on boot, monitor works fine, and plugging DVI-D makes the monitor
connected to DVI-D blank. However, if I change monitor setup using e.g. GNOME
Displays, the DVI-I will turn blank and DVI-D will work. Disconnecting DVI-D
afterwards does not help, DVI-I remains blank.

I have three HDMI monitors, two of them are connected via DVI->HDMI adapters,
and I can do further testing if it could be helpful.

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[Bug 91202] Output to DVI-I (or DVI-D) is blank on Tonga (R9 285 and 380X) with multiple monitors

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=91202

--- Comment #9 from Vedran Miletić <rivanvx@gmail.com> ---
EoD did testing on Sapphire R9 380X Nitro, details at
https://gist.github.com/EoD/2baa78b81e233218a59c and copied below:

Booted with DVI-D-0 + HDMI-A-0
Both displays work

Booted with DVI-I-1 + HDMI-A-0
Both displays work

Booted with DVI-D-0 + DVI-I-1
DVI-D-0 shows output, DVI-I-1 stays blank  (via xrandr)

Booted with DVI-I-1 + plugging in DVI-D-0 after boot
DVI-I-1 shows output, DVI-D-0 stays blank  (via xrandr)

Booted with DVI-I-1 + plugging in DVI-D-0 after boot + removing DVI-I-1: 
DVI-D-0 stays blank  (via xrandr)

Booted with DVI-I-1 + plugging in HDMI-A-0 after boot + removing DVI-I-1 +
plugging in DVI-D-0:
HDMI-A-0 shows output, DVI-D-0 stays blank (via xrandr)
When switching to a virtual termina, HDMI-A-0 goes blank, DVI-D-0 shows output

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[Bug 91202] Output to DVI-I (or DVI-D) is blank on Tonga (R9 285 and 380X) with multiple monitors

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=91202

--- Comment #10 from Vedran Miletić <rivanvx@gmail.com> ---
Further information: this bug does not occur on R9 380, tested with

01:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc.
[AMD/ATI] Tonga PRO [Radeon R9 285/380] [1002:6939] (rev f1) (prog-if 00 [VGA
controller])

Dual DVI using DVI-I and DVI-D works fine.

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[Bug 91202] Output to DVI-I (or DVI-D) is blank on Tonga (R9 285 and 380X) with multiple monitors

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=91202

--- Comment #11 from EoD <EoD@xmw.de> ---
(In reply to Vedran Miletić from comment #9)
> EoD did testing on Sapphire R9 380X Nitro, details at
> https://gist.github.com/EoD/2baa78b81e233218a59c and copied below:

This has been tested on drm-next-4.5 geafbbd9 and drm-next-4.5-wip gbc48ef9,
although only the trivial cases.

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[Bug 91202] Output to DVI-I (or DVI-D) is blank on Tonga (R9 285 and 380X) with multiple monitors

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=91202

--- Comment #12 from Marco Wentsch <marco.wentsch@gmail.com> ---
Created attachment 123142
  --> https://bugs.freedesktop.org/attachment.cgi?id=123142&action=edit
xrandr --verbose output with DVI-I-0 in a working 1680x1050 mode

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[Bug 91202] Output to DVI-I (or DVI-D) is blank on Tonga (R9 285 and 380X) with multiple monitors

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=91202

--- Comment #13 from Marco Wentsch <marco.wentsch@gmail.com> ---
Created attachment 123143
  --> https://bugs.freedesktop.org/attachment.cgi?id=123143&action=edit
Xorg.log

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[Bug 91202] Output to DVI-I (or DVI-D) is blank on Tonga (R9 285 and 380X) with multiple monitors

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=91202

--- Comment #14 from Marco Wentsch <marco.wentsch@gmail.com> ---
hi, i have the same issue on Ubuntu 16.04 LTS final. 
I tried to upgrade the kernel to 4.6 rc4 by self compile but nothing have
changed, it doesn't work.

My graphiccard:
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI]
Amethyst XT [Radeon R9 M295X Mac Edition / R9 380X] (rev f1)

XFX R9 380X DD Black Edition OC


On HDMI-A-0 it works on native solution
on DVI-I-1 its does not work on native solutions but on 1680x1050, i have
choose at the moment 1600x900 because it looks better

befor i upgrade i have ubuntu 15.10 (fgrlx and amdgpu) with the orginal kernel
and self compiled 4.3 with kvm patches and with both driver it works.

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[Bug 91202] Output to DVI-I (or DVI-D) is blank on Tonga (R9 285 and 380X) with multiple monitors

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=91202

--- Comment #15 from Guido Winkelmann <guido-xorgbugs@unknownsite.de> ---
Problem is still present in Linux 4.5.3

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[Bug 91202] Output to DVI-I (or DVI-D) is blank on Tonga (R9 285 and 380X) with multiple monitors

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https://bugs.freedesktop.org/show_bug.cgi?id=91202

--- Comment #16 from Brian Paterni <bpaterni@gmail.com> ---
just to confirm something mentioned on IRC back in February:

    10:55 #radeon: < vedranm> by the way, any chance that you looked into the 3
display issue on Linux_
    10:55 #radeon: < vedranm> sorry, DVI-I issue that is
    10:56 #radeon: < agd5f> vedranm, no. should be fixed by the new dal code 


I checked out branch 'drm-next-4.7-wip-dal' from
git://people.freedesktop.org/~agd5f/linux today and can say that I no longer
experience a 'dead' display on DVI-I running the new DAL code!

Interestingly, with DAL, both DVI interfaces on my r9 285 are now detected as
DVI-D by xrandr...

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[Bug 91202] Output to DVI-I (or DVI-D) is blank on Tonga (R9 285 and 380X) with multiple monitors

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https://bugs.freedesktop.org/show_bug.cgi?id=91202

--- Comment #17 from Thomas R. <freedesktop-bugs@digital-trauma.de> ---
Thanks for letting us know. Sadly, I have a feeling we'll wait quite some time
for DAL in mainline.

I realize that Alex kinda has to act as if merging DAL was right around the
corner (wrt this bug, fex), but.. Well...

http://thread.gmane.org/gmane.comp.video.dri.devel/149763/focus=149834

Admittedly this makes buying a R9 285 specifically to be able to use this
driver look a bit stupid. :/

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[Bug 91202] Output to DVI-I (or DVI-D) is blank on Tonga (R9 285 and 380X) with multiple monitors

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https://bugs.freedesktop.org/show_bug.cgi?id=91202

--- Comment #18 from Guido Winkelmann <guido-xorgbugs@unknownsite.de> ---
Looks like the DAL line has been pretty much abandoned at this point.

So what now? Are us AMD now just stuck with either outdated kernels or broken
multi-monitor support?

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https://bugs.freedesktop.org/show_bug.cgi?id=91202

--- Comment #19 from Alex Deucher <alexdeucher@gmail.com> ---
DAL is still being actively developed.  The latest branch is here:
https://cgit.freedesktop.org/~agd5f/linux/log/?h=amd-staging-4.7

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[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=91202

--- Comment #20 from jokeyrhyme@gmail.com ---
For a while there it looked like we might get the DAL work in Linux 4.9, but
now I'm wondering if this is more of a 4.10 or 4.11 thing.
- https://www.phoronix.com/scan.php?page=news_item&px=AMDGPU-Linux-4.9-First

It's actually a pretty exciting time for AMD GPUs on Linux, as it is right in
the middle of a massive overhaul. I purchased a Tonga specifically so I could
bear witness to this open-by-default turnaround for the AMD team.

And yeah, it's totally frustrating the multi-monitor is broken right now, but
at least we get re-clocking. Imagine how frustrating it must be for open-source
nVidia fans right now, with nVidia itself having long stymied the community
work in that area.

With my current setup, I have both monitors connected to my Intel GPU, and the
primary monitor also connected to the AMD one, with Intel being initialised by
EFI / BIOS first. In Linux, I switch the primary monitor to Intel, and for
Windows I switch it back to AMD. Not perfect of course, but this flow sort of
works for me.

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[Bug 91202] Output to DVI-I (or DVI-D) is blank on Tonga (R9 285 and 380X) with multiple monitors

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https://bugs.freedesktop.org/show_bug.cgi?id=91202

--- Comment #21 from Guido Winkelmann <guido-xorgbugs@unknownsite.de> ---
(In reply to Alex Deucher from comment #19)
> DAL is still being actively developed.  The latest branch is here:
> https://cgit.freedesktop.org/~agd5f/linux/log/?h=amd-staging-4.7

I just tried booting with that kernel (commit
f67b5d7409ed6f4c5b353932bcafffea995094be). It doesn't solve this issue for me.
(Branch drm-next-4.7-wip-dal did.)

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https://bugs.freedesktop.org/show_bug.cgi?id=91202

--- Comment #22 from Guido Winkelmann <guido-xorgbugs@unknownsite.de> ---
Please ignore that last comment - turns out I just hadn't switched DAL on in
the config...

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[Bug 91202] Output to DVI-I (or DVI-D) is blank on Tonga (R9 285 and 380X) with multiple monitors

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https://bugs.freedesktop.org/show_bug.cgi?id=91202

--- Comment #23 from Thomas R. <freedesktop-bugs@digital-trauma.de> ---
Guido, does that mean that now it works for you, or simply that you can't say
one way or the other because you didn't test with DAL actually running?

I'm asking because I finally got around to compile amd-staging-4.7 (which only
works with a certain set of kernel options, BTW), and with DAL enabled and both
the last commit and f67b5d74 you mentioned, I still see this bug. So now I'm
confused - am I doing something wrong, or was the fix a victim of the numerous
DAL cleanups along the way, or maybe the freesync changes? I got "[drm] DAL is
enabled" in my kernel log at any rate, and freesync.c dumps stack traces in
warn_slowpath_null, which I guess is just a development help and nothing
serious.

If I'd find a branch with both a working and non-working revision in it I'd be
willing to bisect, but going back in staging-4.7 removes DAL completely, and
staging-4.6 doesn't even compile for me, which was when I gave up yesterday.

It's a shame because apart from this, 4.7 works really, really well. So if
there is anything I can do to properly triangulate this problem, I'd be very
eager to help.

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[Bug 91202] Output to DVI-I (or DVI-D) is blank on Tonga (R9 285 and 380X) with multiple monitors

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https://bugs.freedesktop.org/show_bug.cgi?id=91202

--- Comment #24 from Guido Winkelmann <guido-xorgbugs@unknownsite.de> ---
(In reply to Thomas R. from comment #23)
> Guido, does that mean that now it works for you, or simply that you can't
> say one way or the other because you didn't test with DAL actually running?

No, it works for me like this, as of commit
d330e1e9c232895dbd0c183a647d41d54ecc0884.

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[Bug 91202] Output to DVI-I (or DVI-D) is blank on Tonga (R9 285 and 380X) with multiple monitors

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https://bugs.freedesktop.org/show_bug.cgi?id=91202

--- Comment #25 from Guido Winkelmann <guido-xorgbugs@unknownsite.de> ---
I tried upgrading to the newest commit in amd-staging-4.7 today
(680da8633ae17cdea8fddd1ede87253325c8ca25), and now it is broken now, but in a
different way, see: https://bugs.freedesktop.org/show_bug.cgi?id=98730

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[Bug 91202] Output to DVI-I (or DVI-D) is blank on Tonga (R9 285 and 380X) with multiple monitors

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--- Comment #26 from Thomas R. <freedesktop-bugs@digital-trauma.de> ---
ASUS STRIX-R9285-DC2OC-2GD5:

Still not working in Mainline 4.9.11. 
Not working in any DAL-4.7 version, either (tried all commits Guido mentioned,
but it seems he switched cards in between, now having reported a bug for a
Sapphire Nitro Radeon R9 380X.

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[Bug 91202] Output to DVI-I (or DVI-D) is blank on Tonga (R9 285 and 380X) with multiple monitors

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https://bugs.freedesktop.org/show_bug.cgi?id=91202

--- Comment #27 from Thomas R. <freedesktop-bugs@digital-trauma.de> ---
With amd-staging-4.9, commit a364784ea02674736abd9d345fd74bf6787f95a1
("drm/amdgpu: expose GPU sensor related information"), it works now, but only
if DC is enabled (I guess it's DAL reborn?)

Either I didn't configure DAL correctly before (even though it showed up in
dmesg), or there was an actual change that made it work for my card between
xmas and now.

Today I lit a candle and deleted fglrx.

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[Bug 91202] Output to DVI-I (or DVI-D) is blank on Tonga (R9 285 and 380X) with multiple monitors

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https://bugs.freedesktop.org/show_bug.cgi?id=91202

Lars Wendler <polynomial-c@gentoo.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |polynomial-c@gentoo.org

--- Comment #28 from Lars Wendler <polynomial-c@gentoo.org> ---
Still not fixed with kernel-5.4-rc6

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[Bug 91202] Output to DVI-I (or DVI-D) is blank on Tonga (R9 285 and 380X) with multiple monitors

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

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

--- Comment #29 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/50.

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