https://bugs.kde.org/show_bug.cgi?id=376341
--- Comment #29 from M. Raymond Vaughn <nethers...@gmail.com> --- Dear KDE bug wranglers, May I ask what the current disposition of this bug is, and whether there is anything at all I can do to help resolve it? My research indicates the problem is widespread on a variety of hardware, and I have yet to find anything approaching a root cause analysis or a limitation to the circumstances that may yield symptoms. I have two Gentoo Linux systems both running Plasma 5.17.5 on Xorg 1.20.6: one always reproduces the issue, and one never reproduces the issue. I am in a position to perform comparative testing, and the system with symptoms matches the reporter's description precisely with the exception that it is not a laptop and both displays are identical. The machine that does reproduce the issue every time has two identical displays both attached to the dual HDMI outputs of a single AMD Radeon Vega 56 discrete graphics card. The graphics are currently supported by the xf86-video-amdgpu open source drivers, but I have had the same results with respect to this issue using the proprietary drivers. The system runs kernel 5.5.5 with the Gentoo patchset. Its integrated graphics controller is disabled. The machine that behaves exactly as expected on resuming from DPMS states has two identical displays both attached to the dual DisplayPort outputs of an integrated Intel i915 graphics controller, and runs kernel 4.19.97 with the Gentoo patchset. Both machines otherwise run similar or identical software (including ) with similar or identical configurations, both having been installed and configured from scratch for my exclusive use based on the same template. It is difficult to assess at this time what minor differences may be relevant, as I have only recently begun descending into the madness of attempting to troubleshoot this issue once more by comparing the two machines, though I am hopeful additional exploration may bear fruit. If I may be of service, please let me know the state of your investigation and which particular diagnostics would be most useful to you. I am able to perform low-level debugging, but will need your superior familiarity with the software for direction. Thank you for your attention. -- You are receiving this mail because: You are watching all bug changes.
