Bug 1417778

I'm still seeing this with Fedora 26.

I have the exact same issue being reported here, with both Fedora 25 and Fedora 26. I'm using a 4k Dell display with an AMD RX 480 graphics card. The desktop is unusable because of the strain that the constant flickering puts on my eyes.

Hi Josh. My 4k monitor is a Dell P2715Q, running at 3840x2160, 60 Hz over the full-size Display Port input, MST off.

Exactly the same display and setup here.

Nice to virtually run into you, fellow Mozillian :)

I'm seeing the same thing on F26 with an RX460 and a 4K display running at 380x2160@59Hz.

The flicker most often happens for me after the display comes out of the screen lock/power save.  I've had my system go for several days without issue, or multiple times within the same day.  The flicker is most pronounced when moving a window about, such as a web browser, but will also happen randomly when no applications are running.  Most often the top tenth to top quarter of the screen is flickering.  Rarely does it involve the whole screen or half of the screen.

The flicker will go away when logging out and logging back into the GUI session.  It seems to return about the same as if the system were rebooted.

Looks like there are a few other bugs related to this:
https://bugzilla.redhat.com/show_bug.cgi?id=1443581
Closed as a "duplicate" of an Xorg flicker problem (https://bugzilla.redhat.com/show_bug.cgi?id=1353008)

Other comments seem to indicate that reducing resolution does not lead to flickering (which is not a helpful fix).  It is also worth noting that I used to run the nouveau drivers with a latest generation Nvidia, however that would randomly crash.  That crash also appeared to be screen related.

I'm pleased someone at Red Hat can reproduce. That's good news.

The flicker has been particularly bad lately, for example, bands of the background image flashing through the browser window on the 4k screen whenever a build output scrolls in a terminal on a secondary display.

I haven't bothered to file a bug for the third display cycling through primary colours instead of blanking, but that started a after an update a week or two ago.

I've been having the exact same problem as described above ever since I installed the 4K display on my machine (under wayland under both FC25 and FC26). I originally switched back to the Gnome/Xorg as artifacts were severe; it may be slightly improved on Fedora 26, but is still quite straining. Symptoms are largely equivalent to what is reported above (mostly affects top 1/10th of the 4K (Asus 3840x2160@59Hz); a second standard display (1920x1080@60Hz) is rock-solid); I've tried both Nvidia and AMD graphics cards (currently running a Sapphire Pro), to no avail.

I know that this is a Fedora bug-tracker, however I'm having the same problem with Ubuntu 17.04 running Gnome Shell 3.24 Wayland session. I'm using AMD RX560 video card, using the 'amdgpu' kernel driver. lspci shows

01:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Baffin [Polaris11] [1002:67ff] (rev cf)

The monitor is Dell P2715Q running at 4K (3840x2160).
If I hard-disable screen suspend in the Mutter source code, the problem is gone:

diff --git a/src/backends/meta-monitor-manager.c b/src/backends/meta-monitor-manager.c
index dc1d960..3addbe6 100644
--- a/src/backends/meta-monitor-manager.c
+++ b/src/backends/meta-monitor-manager.c
@@ -225,7 +225,7 @@ power_save_mode_changed (MetaMonitorManager *manager,
     return;
 
   /* If DPMS is unsupported, force the property back. */
-  if (manager->power_save_mode == META_POWER_SAVE_UNSUPPORTED)
+  //if (manager->power_save_mode == META_POWER_SAVE_UNSUPPORTED)
     {
       meta_dbus_display_config_set_power_save_mode (META_DBUS_DISPLAY_CONFIG (manager), META_POWER_SAVE_UNSUPPORTED);
       return;


However this of course disables screen power save.

If I now turn the display off using the power button on the screen, then turn it back on the problem returns even with the patched libmutter.

I'll check to see if the problem persists with Gnome 3.26 once I update to Ubuntu 17.10. Will also install Fedora 27 once it's out and test there as well.

(In reply to nushoin from comment #8)
> I know that this is a Fedora bug-tracker, however I'm having the same
> problem with Ubuntu 17.04 running Gnome Shell 3.24 Wayland session. I'm
> using AMD RX560 video card, using the 'amdgpu' kernel driver. lspci shows
> 
> 01:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc.
> [AMD/ATI] Baffin [Polaris11] [1002:67ff] (rev cf)
> 
> The monitor is Dell P2715Q running at 4K (3840x2160).
> If I hard-disable screen suspend in the Mutter source code, the problem is
> gone:
> 
> diff --git a/src/backends/meta-monitor-manager.c
> b/src/backends/meta-monitor-manager.c
> index dc1d960..3addbe6 100644
> --- a/src/backends/meta-monitor-manager.c
> +++ b/src/backends/meta-monitor-manager.c
> @@ -225,7 +225,7 @@ power_save_mode_changed (MetaMonitorManager *manager,
>      return;
>  
>    /* If DPMS is unsupported, force the property back. */
> -  if (manager->power_save_mode == META_POWER_SAVE_UNSUPPORTED)
> +  //if (manager->power_save_mode == META_POWER_SAVE_UNSUPPORTED)
>      {
>        meta_dbus_display_config_set_power_save_mode
> (META_DBUS_DISPLAY_CONFIG (manager), META_POWER_SAVE_UNSUPPORTED);
>        return;
> 
> 
> However this of course disables screen power save.
> 
> If I now turn the display off using the power button on the screen, then
> turn it back on the problem returns even with the patched libmutter.
> 
> I'll check to see if the problem persists with Gnome 3.26 once I update to
> Ubuntu 17.10. Will also install Fedora 27 once it's out and test there as
> well.

Forgot to mention, the display is running at 60Hz (settings shows 59Hz) and connected over display port.

I restarted after installing the latest fedora 26 updates today and the flickering is particularly bad. I uploaded a rough video as an example of the behaviour at https://people.xiph.org/~giles/2017/bug-1417778_20171024.webm

The band you can see at the top of the screen in the last frame of the video is part of the background image.

linux 4.13.5-200.fc26
wayland 1.13.0-1.fc26
mesa-dri-drivers 17.2.2-2.fc26

(In reply to Ralph Giles from comment #10)
> I restarted after installing the latest fedora 26 updates today and the
> flickering is particularly bad. I uploaded a rough video as an example of
> the behaviour at
> https://people.xiph.org/~giles/2017/bug-1417778_20171024.webm
> 
> The band you can see at the top of the screen in the last frame of the video
> is part of the background image.
> 
> linux 4.13.5-200.fc26
> wayland 1.13.0-1.fc26
> mesa-dri-drivers 17.2.2-2.fc26

Yep got the exact same issues.

Tested on Ubuntu 17.10 GNOME Wayland session (GNOME 3.26.1, Linux 4.13, Radeon RX560 using amdgpu, Dell P2715Q monitor running at 4K@59, mesa 17.2.2).

The hack that I posted above solves the problem in this setup as well. I'll test on Fedora 27 once it's out, but I suspect that the result will be the same.

Still occurs for me with Fedora 27.

Same issue here.

Ubuntu 17.10 GNOME Wayland session (GNOME 3.26.2, Linux 4.13, Radeon RX560 using amdgpu, Lenovo l24q-10 monitor running at 2k (2560x1440@ 59.95Hz).

If using X session instead of Wayland there's no flickering.

Add a "me too". F27 x64 with latest updates as of 9th of January, Using Displayport connector with an Amd RX 560 to 4k display Samsung U32H850.

Exactly like in the video posted in comment 10. Doesn't occur under Xorg, just Wayland. After a few screen locks. Logging out and in again cures it.

A question to other fellows: do you observe the same behaviour with HDMI connection as well, or it is a "feature" of Displayport? Haven't tested yet.

Sometimes I observe the following kernel messages (several versions):

drm:amdgpu_atombios_dp_link_train [amdgpu]] *ERROR* displayport link status failed
[drm:amdgpu_atombios_dp_link_train [amdgpu]] *ERROR* clock recovery failed

appears unrelated to flickering, however.

confirming on:
Graphics:  Card: Advanced Micro Devices [AMD/ATI] Baffin [Radeon RX 460/560D / Pro 450/455/460/560]
           Display Server: wayland (X.org 119.6 )
           drivers: modesetting,fbdev,vesa
           Resolution: 1680x1050, 2560x1440
           OpenGL: renderer: Radeon RX 560 Series (POLARIS11 / DRM 3.23.0 / 4.15.6-300.fc27.x86_64, LLVM 5.0.1)
           version: 4.5 Mesa 17.3.6

Only on display link HiDPI display in dual screen setup. Using Wayland.

Is there an official AMD GPU bug tracker where this can be reported?

I cannot add this to the 'see also', but here is a link to Gnome GitLab:
https://gitlab.gnome.org/GNOME/mutter/issues/22

Maybe related: https://bugs.freedesktop.org/show_bug.cgi?id=96868

Since the last round of updates the behavior has changed for me.
After resume for suspend, the display connected to the displaylink port does not wake up at all, the display connected to the dvi port does. When I use Ctrl-Alt-F3 to switch to a CLI terminal and Ctrl-Alt-F1 to switch back to the graphical mode, the displaylink connected display wakes up.

I do not have the flickering any more, but there is a minor disruption of one pixel high on the dvi connected display (random pixels, slightly flickering).

Kernel:
Linux nyx 4.15.8-300.fc27.x86_64 #1 SMP Fri Mar 9 18:11:36 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

Graphics:  Card: Advanced Micro Devices [AMD/ATI] Baffin [Radeon RX 460/560D / Pro 450/455/460/560]
           Display Server: X.org 1.19.6 drivers: modesetting,fbdev,vesa
           Resolution: 3840x2160, 1680x1050
           OpenGL: renderer: Radeon RX 560 Series (POLARIS11 / DRM 3.23.0 / 4.15.8-300.fc27.x86_64, LLVM 5.0.1)
           version: 4.5 Mesa 17.3.6

I'm curious what behavior the other commenters of this bug see.

Apologies, the behavior described in my comment above is on X-org.

I'm a bit in doubt where to provide updates for this bug, as it is also reported for:

Ubuntu: https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1740484
Gnome: https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1740484

For now I will post comments in Gnomes GitLab, as the issue seems not to be distribution specific.

But, is Gnomes GitLab the best place, as this seems to be a driver issue? If not please let me know where this issue should be reported.

Link to Gnomes GitLab in comment above should be:
https://gitlab.gnome.org/GNOME/mutter/issues/22

Me too. F29, Radeon RX Vega M GH (NUC8i7HVK), Samsung QLED TV 4K@30hz.

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