https://bugs.kde.org/show_bug.cgi?id=506814

Rajeesh K V <[email protected]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |[email protected]

--- Comment #4 from Rajeesh K V <[email protected]> ---
I hit the same problem with plasma 6.5.3, Intel Alder Lake UHD 770 graphics,
connected via displayport to a Samsung Galaxy Viewfinity S8 4K monitor, after
enabling HDR. The screen can be recovered by turning off HDR (and then
reverting the config) also works, until system goes to sleep next time.

In the system log, I could see the following:

```
Nov 27 10:09:45 brussels kscreenlocker_greet[16677]: Failed to write to the
pipe: Bad file descriptor.
Nov 27 10:09:45 brussels kscreenlocker_greet[16677]: Could not create EGL
surface (EGL error 0x3000)
Nov 27 10:09:45 brussels kwin_wayland_wrapper[16677]:   wp_presentation#37
still attached
Nov 27 10:09:45 brussels kwin_wayland_wrapper[16677]: warning: queue "mesa egl
surface queue" 0x7f8bb4caadf0 destroyed while proxies still attached:
Nov 27 10:09:45 brussels audit[16915]: AUDIT1100 pid=16915 uid=1000 auid=1000
ses=3 subj=kernel msg='op=PAM:unix_chkpwd acct="rajeesh"
exe="/usr/bin/unix_chkpwd" hostname=?>
Nov 27 10:09:42 brussels audit[1]: SERVICE_START pid=1 uid=0 auid=4294967295
ses=4294967295 subj=kernel msg='unit=fprintd comm="systemd"
exe="/usr/lib/systemd/systemd" host>
Nov 27 10:09:42 brussels systemd[1]: Started fprintd.service - Fingerprint
Authentication Daemon.
Nov 27 10:09:42 brussels org_kde_powerdevil[2240]: [ 16906]
(dw_recheck_displays_func) Recheck interval: Sleeping for 200 milliseconds
Nov 27 10:09:42 brussels org_kde_powerdevil[2240]: [  2240] Unquiescing
libddcutil API...
Nov 27 10:09:42 brussels org_kde_powerdevil[2240]: [  2240] Display redetection
finished.
Nov 27 10:09:42 brussels org_kde_powerdevil[2240]: [  2240] libddcutil watch
thread 0x557594cf33d0 started
Nov 27 10:09:42 brussels org_kde_powerdevil[2240]: [  2240] libddcutil recheck
thread 0x557594c2b8e0 started
Nov 27 10:09:42 brussels org_kde_powerdevil[2240]: [  2240]                    
                     extra_stabilization_millisec: 0, 
stabilization_poll_millisec: 100
Nov 27 10:09:42 brussels org_kde_powerdevil[2240]: [  2240] Watching for
display connection changes, resolved watch mode = Watch_Mode_Xevent, poll loop
interval = 100 milli>
Nov 27 10:09:42 brussels systemd[1]: Starting fprintd.service - Fingerprint
Authentication Daemon...
Nov 27 10:09:42 brussels audit: BPF prog-id=128 op=LOAD
Nov 27 10:09:41 brussels org_kde_powerdevil[2240]: [  2240] Watch thread
terminated.
Nov 27 10:09:41 brussels org_kde_powerdevil[2240]: [ 16797] recheck thread
terminating because watch thread terminated
Nov 27 10:09:41 brussels org_kde_powerdevil[2240]: [  2240] Display redetection
starting.
Nov 27 10:09:41 brussels org_kde_powerdevil[2240]: [  2240] Quiesce libddcutil
API complete
Nov 27 10:09:41 brussels org_kde_powerdevil[2240]: [  2240] Quiescing
libddcutil API...
Nov 27 10:09:41 brussels org_kde_powerdevil[2240]: [ 16897] Callback function
0x7f9e3e581690 for event DDCA_Display_Status_Event[5613.942: 
DDCA_EVENT_DISPLAY_CONNECTED, ca>
Nov 27 10:09:41 brussels org_kde_powerdevil[2240]: [ 16897] Invoking callback
function 0x7f9e3e581690 for event DDCA_Display_Status_Event[5613.942: 
DDCA_EVENT_DISPLAY_CONN>
Nov 27 10:09:41 brussels org_kde_powerdevil[2240]: [ 16798] Started 1 event
callback thread(s)
Nov 27 10:09:41 brussels org_kde_powerdevil[2240]: [ 16798] libddcutil callback
thread 0x7f9e00002990 started
Nov 27 10:09:41 brussels org_kde_powerdevil[2240]: [ 16798] Starting 1 callback
threads
Nov 27 10:09:41 brussels org_kde_powerdevil[2240]: [ 16798] Emitting
DDCA_Display_Status_Event[5613.942:  DDCA_EVENT_DISPLAY_CONNECTED, card1-DP-1,
dref: DDCA_Display_Ref[6>
Nov 27 10:09:40 brussels org_kde_powerdevil[2240]: [ 16798] Adding connected
display with bus 9
```

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