[Bug 42490] NUTMEG DP to VGA bridge not working

[Bug 42490] NUTMEG DP to VGA bridge not working

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=42490

Alex Deucher <agd5f@yahoo.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|xorg-driver-ati@lists.x.org |dri-devel@lists.freedesktop
                   |                            |.org
          QAContact|xorg-team@lists.x.org       |
            Summary|[drm:atom_op_jump] *ERROR*  |NUTMEG DP to VGA bridge not
                   |atombios stuck in loop for  |working
                   |more than 5secs aborting    |
            Product|xorg                        |DRI
          Component|Driver/Radeon               |DRM/Radeon

--- Comment #6 from Alex Deucher <agd5f@yahoo.com> 2011-11-02 14:51:58 PDT ---
The DP to VGA bridge chips on a llano APUs are problematic in a lot of cases. 
You might try a newer kernel or use a digital port (HDMI, DP, DVI) in the
meantime.

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--- Comment #7 from Mandeep Singh Baines <mandeep.baines@gmail.com> 2011-11-02 19:15:33 PDT ---
I've tried 3.0.6, 3.1 and the drm-core-next branch from:
git://people.freedesktop.org/~airlied/linux

Is there a radeon linux kernel tree I could test? I'm also happy to test any
patches against any tree.

I've ordered an HDMI-DVI cable so I'll give that a shot in a few days.

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--- Comment #8 from Alex Deucher <agd5f@yahoo.com> 2011-11-03 07:17:19 PDT ---
(In reply to comment #7)
> I've tried 3.0.6, 3.1 and the drm-core-next branch from:
> git://people.freedesktop.org/~airlied/linux
> 
> Is there a radeon linux kernel tree I could test? I'm also happy to test any
> patches against any tree.

You can try drm-fixes-staging, but I doubt you'll see any change.  I'll be sure
to update this bug as I make progress with the NUTMEG chip.

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--- Comment #9 from Mandeep Singh Baines <mandeep.baines@gmail.com> 2011-11-03 19:15:58 PDT ---
Tested with drm-fixes-staging. Same behavior.

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--- Comment #10 from Mandeep Singh Baines <mandeep.baines@gmail.com> 2011-11-05 19:58:01 PDT ---
Woot! HDMI works fine.

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[Bug 42490] NUTMEG DP to VGA bridge not working

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Alex Deucher <agd5f@yahoo.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |diego.abelenda@gmail.com

--- Comment #11 from Alex Deucher <agd5f@yahoo.com> 2012-03-12 06:43:07 PDT ---
*** Bug 47064 has been marked as a duplicate of this bug. ***

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--- Comment #12 from Jeff Cook <jeff@deserettechnology.com> 2012-04-14 20:00:52 PDT ---
Seeing this here on an Acer Aspire am3470g-uw10p with Radeon HD 6530D. The vga
output dies as soon as radeon with KMS is loaded. In process of acquiring HDMI
cable to test with HDMI output.

I have tried with 3.3.1 and 3.3.2 and same problem. Using xorg 1.12.1,
xf86-video-ati 6.14.4, ati-dri/mesa 8.0.2 on brand new Arch Linux. Also tried
Ubuntu 11.10 Live CD and same results.

Adding vga=775 radeon.modeset=0 to kernel boot line gives me a usable console
interface and Xorg will actually start that way, but Xorg display is highly
corrupted with bands of bright green and red lines.

Ubuntu 12.04 beta 2 gives same result except that it can successfully start a
non-corrupted (but incorrect resolution) Xorg server with the kernel boot line
above.

I have an identical snippet in my dmesg as the one posted by Mandeep Baines
above.

This bug is marked fixed for Ubuntu in Launchpad (
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/825777 ) but it doesn't
work with a fully up-to-date Arch Linux. I haven't had occasion to try the
specific Ubuntu kernel build (3.0.0-17.30) cited as resolving the problem (and
it seems to be based on one positive result) and I don't seem to see a patch
that would be applicable to a mainline kernel.

lspci:
VGA compatible controller: Advanced Micro Devices [AMD] nee ATI BeaverCreek
[Radeon HD 6530D]

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--- Comment #13 from Jeff Cook <jeff@deserettechnology.com> 2012-04-15 21:38:56 PDT ---
So it turns out the monitor didn't have an HDMI input.

The only way I could get it working without an HDMI-DVI cable was to downgrade
to Xorg 1.11 and install Catalyst. I'm looking forward to the arrival of an
HDMI-capable monitor at that station so I can test the open-source driver more
thoroughly (get some quite annoying crashes with Catalyst).

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--- Comment #14 from Alex Deucher <agd5f@yahoo.com> 2012-04-27 14:18:03 PDT ---
Created attachment 60707
  --> https://bugs.freedesktop.org/attachment.cgi?id=60707
possible fix

This patch fixes things for me.

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--- Comment #15 from diego.abelenda@gmail.com 2012-04-28 00:39:38 PDT ---
Doesn't change anything for me.
I tried patching a kernel 3.3.2 and a 3.4.0_rc4 ... should I try with a
next-drm or drm-fixes-staging ?

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Niels Ole Salscheider <niels_ole@salscheider-online.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |niels_ole@salscheider-onlin
                   |                            |e.de

--- Comment #16 from Niels Ole Salscheider <niels_ole@salscheider-online.de> 2012-04-28 03:40:51 PDT ---
This does not fix the problem for me, either...

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--- Comment #17 from Niels Ole Salscheider <niels_ole@salscheider-online.de> 2012-04-28 03:41:32 PDT ---
Created attachment 60730
  --> https://bugs.freedesktop.org/attachment.cgi?id=60730
dmesg with proposed patch and drm.debug=4

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--- Comment #18 from Alex Deucher <agd5f@yahoo.com> 2012-04-28 16:01:00 PDT ---
(In reply to comment #16)
> This does not fix the problem for me, either...

(In reply to comment #17)
> Created attachment 60730 [details]
> dmesg with proposed patch and drm.debug=4

Your system doesn't use a NUTMEG chip.  It uses TRAVIS for both VGA and LVDS. 
Please attach a copy of your vbios:

(as root)
(use lspci to get the bus id)
cd /sys/bus/pci/devices/<pci bus id>
echo 1 > rom
cat rom > /tmp/vbios.rom
echo 0 > rom

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--- Comment #19 from diego.abelenda@gmail.com 2012-04-29 01:38:38 PDT ---
Created attachment 60758
  --> https://bugs.freedesktop.org/attachment.cgi?id=60758
dmesg with proposed patch and drm.debug=4

Mine is and the patch doesn't correct the problem.

(please ignore the nouveau stuff this is because I want a dual screen so I put
a second card in the machine if not for this problem with the VGA I wouldn't
have it)

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--- Comment #20 from Dave Airlie <airlied@freedesktop.org> 2012-04-29 01:41:58 PDT ---
At least here, I now can boot, however I can't get through a dpms as link
training fails.

so one step forward.

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--- Comment #21 from Niels Ole Salscheider <niels_ole@salscheider-online.de> 2012-04-29 02:14:01 PDT ---
Created attachment 60760
  --> https://bugs.freedesktop.org/attachment.cgi?id=60760
vbios

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--- Comment #22 from Alex Deucher <agd5f@yahoo.com> 2012-04-29 05:27:18 PDT ---
(In reply to comment #19)
> Created attachment 60758 [details]
> dmesg with proposed patch and drm.debug=4
> 
> Mine is and the patch doesn't correct the problem.

Does it work if you boot without VGA attached and then enable it later?  How
about if you disable VGA with xrandr and then re-enable it?  E.g.:
xrandr --output VGA-0 --off
xrandr --output VGA-0 --auto

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--- Comment #23 from Alex Deucher <agd5f@yahoo.com> 2012-04-29 05:30:24 PDT ---
Created attachment 60765
  --> https://bugs.freedesktop.org/attachment.cgi?id=60765
possible fix

Please try this patch in addition to the one in attachment 60707.

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--- Comment #24 from diego.abelenda@gmail.com 2012-04-29 07:45:28 PDT ---
Created attachment 60773
  --> https://bugs.freedesktop.org/attachment.cgi?id=60773
dmesg with second patch and drm.debug=4

without the second patch doing

xrandr --output VGA-0 --off
xrandr --output VGA-0 --auto

logs errors in dmesg

[drm:radeon_dp_link_train_cr] *ERROR* clock recovery reached max voltage
[drm:radeon_dp_link_train_cr] *ERROR* clock recovery failed

---

with the second patch I have exactly the same error...

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diego.abelenda@gmail.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #60773|0                           |1
        is obsolete|                            |

--- Comment #25 from diego.abelenda@gmail.com 2012-04-29 08:14:49 PDT ---
Created attachment 60774
  --> https://bugs.freedesktop.org/attachment.cgi?id=60774
dmesg booting with monitor unplugged and letting X enabling it (2nd patch
applied)

oh sorry the previous log was with monitor connected since boot... with the
patch and booting with the monitor unplugged and then plugging it and letting X
enable it, it works !

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--- Comment #26 from diego.abelenda@gmail.com 2012-04-29 08:34:56 PDT ---
Oh fun. Seeing how the driver seems to mess up things (with your previous
comment) with the connectors when booting with both plugged, I tried to boot
without the nvidia card and both monitors plugged and the unplugging the VGA
monitor during the boot (before X starts) and both screens when off, the VGA
one with "no connection" and the DVI with "no signal".

Once X is started both monitors are detected correctly.

Is it somehow linked to the mirror mode the EFI does ?

Well at least I have a hook to get my dual screen working. Just unplug the VGA
boot and plug it during boot.

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Florian Mickler <florian@mickler.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |florian@mickler.org

--- Comment #27 from Florian Mickler <florian@mickler.org> 2012-04-30 02:54:28 PDT ---
A patch referencing this bug report has been merged in Linux v3.4-rc5:

commit 700698e7c303f5095107c62a81872c2c3dad1702
Author: Alex Deucher <alexander.deucher@amd.com>
Date:   Fri Apr 27 17:18:59 2012 -0400

    drm/radeon/kms: need to set up ss on DP bridges as well

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--- Comment #28 from Jerome Glisse <glisse@freedesktop.org> 2012-05-07 12:57:34 PDT ---
Does people here have better luck with the patch mentioned previously:

drm/radeon/kms: need to set up ss on DP bridges as well

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--- Comment #29 from diego.abelenda@gmail.com 2012-05-07 23:54:17 PDT ---
Well considering the commit pointed is exactly the patch proposed in comment 14
( https://bugs.freedesktop.org/attachment.cgi?id=60707 ) it is pretty clear
that it doesn't do anything for me.

That's why I didn't react at all when the inclusion was advertised.

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lukenshiro@ngi.it changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |lukenshiro@ngi.it

--- Comment #30 from lukenshiro@ngi.it 2012-09-05 18:31:11 UTC ---
I have a similar problem: right after boot, my screen works (displays kernel
messages) until maybe drm module is loaded (I guess by udev), then it becomes
immediately blank and monitor is blinking, and then works again some time after
fbcon and radeon modules are manually loaded in boot scripts (before starting
X).
It depends on modeset=1; if I use modeset=0 this behaviour doesn't appear, bua
X cannot run without KMS.

I have an AMD A4-3300 APU and using a (vanilla) linux kernel 3.5.3 (on
Slackware64)

The real problem is that some time (a couple of minutes or so) after video
adapter is in idle mode (e.g. if I am not using the PC), monitor blinks (as in
low power mode) screen is blank and system is no longer recoverable (unless I
use e.g. ssh just to power it off).
I don't know if the two problems are really related or not. Voltage problems?

I have these messages in dmesg, too, when it happens:
"""
[ 2405.888198] [drm:radeon_atom_encoder_dpms], encoder dpms 33 to mode 0,
devices 00000001, active_devices 00000001
[ 2405.892352] [drm:radeon_dp_get_link_status], link status 44 44 01 00 44 44
[ 2405.892360] [drm:dp_get_adjust_train], requested signal parameters: lane 0
voltage 0.4V pre_emph 3.5dB
[ 2405.892365] [drm:dp_get_adjust_train], using signal parameters: voltage 0.4V
pre_emph 3.5dB
[ 2405.893921] [drm:radeon_dp_get_link_status], link status 44 44 01 00 48 44
[ 2405.893926] [drm:dp_get_adjust_train], requested signal parameters: lane 0
voltage 0.4V pre_emph 6dB
[ 2405.893931] [drm:dp_get_adjust_train], using signal parameters: voltage 0.4V
pre_emph 6dB
[ 2405.895508] [drm:radeon_dp_get_link_status], link status 44 44 01 00 4c 44
[ 2405.895514] [drm:dp_get_adjust_train], requested signal parameters: lane 0
voltage 0.4V pre_emph 9.5dB
[ 2405.895518] [drm:dp_get_adjust_train], using signal parameters: voltage 0.4V
pre_emph 9.5dB
[ 2405.897079] [drm:radeon_dp_get_link_status], link status 44 44 01 00 41 44
[ 2405.897085] [drm:dp_get_adjust_train], requested signal parameters: lane 0
voltage 0.6V pre_emph 0dB
[ 2405.897089] [drm:dp_get_adjust_train], using signal parameters: voltage 0.6V
pre_emph 0dB
[ 2405.898632] [drm:radeon_dp_get_link_status], link status 44 44 01 00 45 44
[ 2405.898634] [drm:dp_get_adjust_train], requested signal parameters: lane 0
voltage 0.6V pre_emph 3.5dB
[ 2405.898636] [drm:dp_get_adjust_train], using signal parameters: voltage 0.6V
pre_emph 3.5dB
[ 2405.900152] [drm:radeon_dp_get_link_status], link status 44 44 01 00 49 44
[ 2405.900155] [drm:dp_get_adjust_train], requested signal parameters: lane 0
voltage 0.6V pre_emph 6dB
[ 2405.900156] [drm:dp_get_adjust_train], using signal parameters: voltage 0.6V
pre_emph 6dB
[ 2405.901674] [drm:radeon_dp_get_link_status], link status 44 44 01 00 42 44
[ 2405.901676] [drm:dp_get_adjust_train], requested signal parameters: lane 0
voltage 0.8V pre_emph 0dB
[ 2405.901677] [drm:dp_get_adjust_train], using signal parameters: voltage 0.8V
pre_emph 0dB
[ 2405.903194] [drm:radeon_dp_get_link_status], link status 44 44 01 00 46 44
[ 2405.903196] [drm:dp_get_adjust_train], requested signal parameters: lane 0
voltage 0.8V pre_emph 3.5dB
[ 2405.903197] [drm:dp_get_adjust_train], using signal parameters: voltage 0.8V
pre_emph 3.5dB
[ 2405.904715] [drm:radeon_dp_get_link_status], link status 44 44 01 00 43 44
[ 2405.904717] [drm:dp_get_adjust_train], requested signal parameters: lane 0
voltage 1.2V pre_emph 0dB
[ 2405.904718] [drm:dp_get_adjust_train], using signal parameters: voltage 1.2V
pre_emph 0dB
[ 2405.906235] [drm:radeon_dp_get_link_status], link status 44 44 01 00 43 44
[ 2405.906238] [drm:radeon_dp_link_train_cr] *ERROR* clock recovery reached max
voltage
[ 2405.906240] [drm:radeon_dp_link_train_cr] *ERROR* clock recovery failed
"""

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--- Comment #31 from Alex Deucher <agd5f@yahoo.com> 2012-09-05 18:34:56 UTC ---
Please try my 3.6 fixes tree (should show up in 3.6.0rc4+ and eventually stable
kernels).
http://cgit.freedesktop.org/~agd5f/linux/log/?h=drm-fixes-3.6

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--- Comment #32 from diego.abelenda@gmail.com 2012-09-07 19:19:10 UTC ---
Created attachment 66808
  --> https://bugs.freedesktop.org/attachment.cgi?id=66808
dmesg booting with 2 monitors plugged drm.debug=4

This drm-fixes-3.6 branch just gives me two black screens when I have them both
plugged during the boot. And when X starts I get a 100% processor usage from
the X process and nothing displayed. The Xorg.0.log shows nothing out of the
ordinary. But I think there is something really wrong because my X server never
starts accepting connection from my login manager.

When I boot with only the DVI screen plugged, no problem it boots fine.
After having booted with only the DVI plugging the VGA one works just like
before.

When X puts my screens into DPMS off and I try to wake them up, the VGA goes
back on correctly with this branch whereas it didn't with vanilla kernel.

So there are some good points and some bad points.

Attached is dmesg | grep -e drm -e radeon when both screens are connected,
after X is "started".

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--- Comment #33 from Alex Deucher <agd5f@yahoo.com> 2012-09-07 19:35:20 UTC ---
You might try this patch on top of my 3.6 fixees tree:
http://cgit.freedesktop.org/~agd5f/linux/commit/?h=drm-next-3.7-wip&id=46b417b3eee694451b5bca8a7863e9174611a2e9

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--- Comment #34 from diego.abelenda@gmail.com 2012-09-07 21:07:16 UTC ---
Created attachment 66817
  --> https://bugs.freedesktop.org/attachment.cgi?id=66817
dmesg booting with 2 monitors plugged patch applyed on top of drm-fixes-3.6
drm.debug=4

With the additional patch, I get the DVI screen displaying things when both a
plugged-in but the VGA one now says there is no signal (instead of staying
black). So the behavior is somewhat similar to the vanilla kernel in that
regard.

Booting with the VGA unplugged and plugging it later gives the same behavior as
without that patch (i.e. better than the vanilla kernel).

Attached is the dmesg | grep -e drm -e radeon when the 2 screens are plugged
and the VGA says no signal.

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[Bug 42490] NUTMEG DP to VGA bridge not working

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https://bugs.freedesktop.org/show_bug.cgi?id=42490

diego.abelenda@gmail.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #66817|application/octet-stream    |text/plain
          mime type|                            |

--- Comment #35 from diego.abelenda@gmail.com 2012-09-07 21:08:26 UTC ---
Comment on attachment 66817
  --> https://bugs.freedesktop.org/attachment.cgi?id=66817
dmesg booting with 2 monitors plugged patch applyed on top of drm-fixes-3.6
drm.debug=4

Sorry wrong auto-detect of the type...

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[Bug 42490] NUTMEG DP to VGA bridge not working

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diego.abelenda@gmail.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #66817|0                           |1
        is obsolete|                            |

--- Comment #36 from diego.abelenda@gmail.com 2012-09-07 21:11:53 UTC ---
Created attachment 66819
  --> https://bugs.freedesktop.org/attachment.cgi?id=66819
dmesg booting with 2 monitors plugged patch applyed on top of drm-fixes-3.6
drm.debug=4

Sorry... I appended the new log to the last one instead of overwriting it...
Now there is only the new dmesg information.

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[Bug 42490] NUTMEG DP to VGA bridge not working

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diego.abelenda@gmail.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #66819|0                           |1
        is obsolete|                            |

--- Comment #37 from diego.abelenda@gmail.com 2012-09-07 21:28:26 UTC ---
Created attachment 66822
  --> https://bugs.freedesktop.org/attachment.cgi?id=66822
dmesg booting with 2 monitors plugged patch applyed on top of drm-fixes-3.6
drm.debug=4

Ok.... I need sleep...
This time is the right dmesg. With both screens plugged during the boot and the
patch, but mysteriously this time the DVI screen stayed black and the VGA had
no link. And X started to take 100% CPU. So exactly the same behavior as
without the patch.

I tried rebooting and then both screens lit up and were black. X using 100%
CPU.

the new attachment shows dmesg | grep -e drm -e radeon   after both attempts.

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[Bug 42490] NUTMEG DP to VGA bridge not working

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--- Comment #38 from Alex Deucher <agd5f@yahoo.com> 2012-09-07 21:52:32 UTC ---
You're getting a GPU hang for some reason which may be causing the modeset
failure.  Can you try with acceleration disabled to take the out of the
equation?  Try adding:
Option "NoAccel" "TRUE"
to the device section of your xorg.conf

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--- Comment #39 from diego.abelenda@gmail.com 2012-09-08 08:59:02 UTC ---
Created attachment 66828
  --> https://bugs.freedesktop.org/attachment.cgi?id=66828
dmesg booting with 2 monitors plugged patch applyed on top of drm-fixes-3.6
drm.debug=4 (X with NoAccel)

I tested a few things and found out that with the patch over drm-fixes-3.6 I
generally get the DVI screen working but the VGA has no signal if it is plugged
during the boot. The generally is there because sometimes I just get a black
screen on the DVI and then X causes a GPU Hangup (The NoAccel suppresses the
Hangup). This situation is rare and If the GPU hangup pressing the reset switch
(instead of letting the machine off during some time and doing a cold boot)
causes it to happen more often.

A "quick" way to do it is booting without the patch starting X without NoAccel
and then pressing the reset button and booting with the patch.

Seems the firmware doesn't reset the state of the card properly during POST or
something. Last night the problem happened "by itself", so it might happen
without trying to provoke it. This morning I tried rebooting a few times but
didn't get it to happen without provoking it.

The attachment is dmesg | grep -e drm -e radeon   when the DVI screen stays
black (VGA saying no signal) and without hangup (provoking it on the previous
boot). The last part is X turning the screens off and trying to wake them up.
The situation didn't change.

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--- Comment #40 from Alex Deucher <agd5f@yahoo.com> 2012-09-08 15:46:24 UTC ---
Does your OEM have a newer bios available for your board?  It might be worth
trying a newer (or maybe older) bios image.

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--- Comment #41 from diego.abelenda@gmail.com 2012-09-08 18:15:14 UTC ---
Oh yes there was and now even without the patch my machine displays something
on the DVI screen when both screens are plugged and the GPU doesn't hang
anymore even without NoAccel (but only from a cold boot, if I reboot/reset I
get a black screen and the GPU hangup). So part of the problem was really a
firmware issue.

With the patch I can't seem to provoke the GPU hangup anymore.

But my VGA screen continues to be stubbornly off when booting with both screens
plugged. Continues to work if I plug my VGA screen after booting.

So now I can start X safely without NoAccel that's one good thing.

BTW my motherboad is an Asus F1A75-M now my firmware is the latest version
(2004) upgraded from 1903.

Oh BTW I am booting in uEFI mode using grub-2.00 I don't know if this might
change something.

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--- Comment #42 from diego.abelenda@gmail.com 2012-09-09 07:33:54 UTC ---
I take back what I said before...
I just did a *very* cold boot (the machine was not connected to the electricity
network during the night). I got the black DVI screen and GPU hangup with the
patch. So the firmware change didn't do anything in facts...

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--- Comment #43 from lukenshiro@ngi.it 2012-09-13 12:21:04 UTC ---
Sorry for the delay.
The 2nd problem I've reported in comment #30 (when video adapter is in idle,
screen blanks and becomes inoperable, error in clock recovery) seems to be
resolved here using linux 3.6.0-rc4. BTW I've just one monitor on VGA port.

The 1st problem (at boot, for about 30-40 seconds screen is blanking and
monitor LED is blinking; after that, messages appear again in console, before
starting X [init 3 mode]) seems to be still present, though.
I will test last drm-fixes-3.6 patches ASAP.

Thank you.

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--- Comment #44 from lukenshiro@ngi.it 2012-09-14 07:59:36 UTC ---
Sorry, I've managed to resolve my first problem (screen blanking after boot for
about 30-40 seconds): it is not related to drm, but it depends on fbcon loaded
as a module (instead of it being compiled statically).

As explained in /usr/src/linux/Documentation/fb/fbcon.txt if fbcon is compiled
as a module (CONFIG_FRAMEBUFFER_CONSOLE=m) it can produce blanking and/or
garbage on display if it is not loaded immediately.
If "Framebuffer Console support" is compiled statically
(CONFIG_FRAMEBUFFER_CONSOLE=y) there is no blanking here.
"Works for me"
HTH.

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https://bugs.freedesktop.org/show_bug.cgi?id=42490

diego.abelenda@gmail.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |d.okias@gmail.com

--- Comment #45 from diego.abelenda@gmail.com ---
*** Bug 51652 has been marked as a duplicate of this bug. ***

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https://bugs.freedesktop.org/show_bug.cgi?id=42490

--- Comment #46 from rmccorkell@karoshi.org.uk ---
I can confirm that this bug is still present in Linux 3.8.0, using X Server 7.7
and driver 7.1.0. As graphics are initialized screen just goes black.

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https://bugs.freedesktop.org/show_bug.cgi?id=42490

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

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

--- Comment #47 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/231.

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