[Bug 90987] xorg black screen after monitor power off, AMD r9 270X, aoc u2868pqu, displayport

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=90987

Michel Dänzer  changed:

   What|Removed |Added

 Status|NEW |RESOLVED
 Resolution|--- |FIXED

--- Comment #16 from Michel Dänzer  ---
(In reply to Sanjeev Kumar Sharma from comment #15)
> I don't know when it got fixed but I have not seen it for a while.

Resolving as fixed, thanks for the followup. Feel free to reopen this report if
it happens again.

Bernd/Daniel, if you're still seeing issues, please file your own reports.

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[Bug 90987] xorg black screen after monitor power off, AMD r9 270X, aoc u2868pqu, displayport

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=90987

--- Comment #15 from Sanjeev Kumar Sharma  ---
I don't know when it got fixed but I have not seen it for a while.

I can turn off the monitor and have it restart the display fine. 

Same with restarting the xorg display from blanked screensaver.

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[Bug 90987] xorg black screen after monitor power off, AMD r9 270X, aoc u2868pqu, displayport

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=90987

Daniel Exner  changed:

   What|Removed |Added

 CC||dex+fdobugzilla@dragonslave
   ||.de

--- Comment #12 from Daniel Exner  ---
I can confirm the same effect for R9 270X + Dell U3415W connected via
DisplayPort.

The other monitor (Dell 2007WFP) connected via DVI works fine.

Latest kernel tested: 4.5.0-rc3-00071-g17a5cd3

Don't know if its related but I also see this every boot:

radeon :01:00.0: Invalid PCI ROM header signature: expecting 0xaa55, got
0x8b00

[drm:si_dpm_set_power_state [radeon]] *ERROR*
si_restrict_performance_levels_before_switch failed

Also note that this is the same card as in #76490.

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[Bug 90987] xorg black screen after monitor power off, AMD r9 270X, aoc u2868pqu, displayport

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=90987

--- Comment #13 from Bernd Steinhauser  ---
(In reply to Daniel Exner from comment #12)
> I can confirm the same effect for R9 270X + Dell U3415W connected via
> DisplayPort.
My Dell U2415 has a setting "DP 1.2" in the display submenu. So maybe yours has
that, too.
If so, do you have that activated and does the effect occur if you disable
that?

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[Bug 90987] xorg black screen after monitor power off, AMD r9 270X, aoc u2868pqu, displayport

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=90987

--- Comment #9 from Bernd Steinhauser  ---
Created attachment 121360
  --> https://bugs.freedesktop.org/attachment.cgi?id=121360=edit
dmesg output

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[Bug 90987] xorg black screen after monitor power off, AMD r9 270X, aoc u2868pqu, displayport

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=90987

--- Comment #10 from Bernd Steinhauser  ---
Created attachment 121361
  --> https://bugs.freedesktop.org/attachment.cgi?id=121361=edit
Xorg log

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[Bug 90987] xorg black screen after monitor power off, AMD r9 270X, aoc u2868pqu, displayport

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=90987

--- Comment #11 from Bernd Steinhauser  ---
I think I was able to reproduce this bug with linux 4.2.5, but the behavior was
slightly different.
The screens went black for about 2s (pointer was still visible), just like
described, but then things returned to normal.
This was with the pageflip option set to on. With off, I wasn't able to
reproduce this.

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[Bug 90987] xorg black screen after monitor power off, AMD r9 270X, aoc u2868pqu, displayport

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=90987

--- Comment #8 from Michel Dänzer  ---
Please attach the full Xorg log and output of dmesg captured after reproducing
the problem.

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[Bug 90987] xorg black screen after monitor power off, AMD r9 270X, aoc u2868pqu, displayport

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=90987

--- Comment #7 from Bernd Steinhauser  ---
(In reply to Michel Dänzer from comment #6)
> (In reply to Bernd Steinhauser from comment #4)
> > 
> > What I noticed is, that I only get this, if I set
> > Option  "TearFree" "Off"
> 
> TearFree is disabled by default. Do you mean that enabling it avoids the
> problem? If so, does Option "EnablePageFlip" "off" avoid the problem as well?

That works as well, so since TearFree does implicate that, it's probably
EnablePageFlip, that fixes it.

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[Bug 90987] xorg black screen after monitor power off, AMD r9 270X, aoc u2868pqu, displayport

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=90987

--- Comment #6 from Michel Dänzer  ---
(In reply to Bernd Steinhauser from comment #4)
> 
> What I noticed is, that I only get this, if I set
> Option  "TearFree" "Off"

TearFree is disabled by default. Do you mean that enabling it avoids the
problem? If so, does Option "EnablePageFlip" "off" avoid the problem as well?

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[Bug 90987] xorg black screen after monitor power off, AMD r9 270X, aoc u2868pqu, displayport

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=90987

Bernd Steinhauser  changed:

   What|Removed |Added

 CC||li...@bernd-steinhauser.de

--- Comment #4 from Bernd Steinhauser  ---
Can confirm, I see this, too:

kernel: [drm:radeon_dp_link_train] *ERROR* displayport link status failed
kernel: [drm:radeon_dp_link_train] *ERROR* clock recovery failed
kernel: [drm:radeon_dp_link_train] *ERROR* displayport link status failed
kernel: [drm:radeon_dp_link_train] *ERROR* clock recovery failed

The screen is an Eizo EV2455. GPU is an AMD Kaveri on Linux 4.4.0.

What I noticed is, that I only get this, if I set
Option  "TearFree" "Off"

and maybe (didn't test explicitely, but it was set at the time):
Option  "DRI" "3"

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[Bug 90987] xorg black screen after monitor power off, AMD r9 270X, aoc u2868pqu, displayport

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=90987

--- Comment #5 from Bernd Steinhauser  ---
Should note: The screen is and stays black, but I can switch to VT and back,
just like mentioned in the first comment.

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[Bug 90987] xorg black screen after monitor power off, AMD r9 270X, aoc u2868pqu, displayport

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=90987

--- Comment #3 from R9 270X  ---
Seems you've faced infamous DP Link training issue. Try to boot with recent
kernel like 4.3-RC3 or so and check if your problem fixed. I can see bunch of
patches dealing with similar conditions.

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[Bug 90987] xorg black screen after monitor power off, AMD r9 270X, aoc u2868pqu, displayport

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=90987

--- Comment #2 from Sanjeev Kumar Sharma spm...@hotmail.com ---
from here:

https://bugs.freedesktop.org/show_bug.cgi?id=90340

I tried the xrandr script, both from a regular terminal and from a kmscon.

Also tried changing the resolution to several other values.

It seemed to have no effect - the blank X still stayed blank; after running
these xrandr commands and switching to that TTY the monitor reports no signal

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[Bug 90987] xorg black screen after monitor power off, AMD r9 270X, aoc u2868pqu, displayport

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=90987

--- Comment #1 from Sanjeev Kumar Sharma spm...@hotmail.com ---
sigh ... don't know how this got fouled up - this sentence 

the only difference with this kernel command option (radeon.dpm=0) is that the
messages do not appear; the symptoms stay - the black xorg TTY, killing X from
another TTY.  



should be attached to this section: 

when this started one thing I tried was changing the kernel command line

GRUB_CMDLINE_LINUX_DEFAULT= md_mod.start_ro=1 radeon.audio=1 radeon.dpm=0 

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