SUMMARY *** NOTE: If you are reporting a crash, please try to attach a backtrace with debug symbols. See https://community.kde.org/Guidelines_and_HOWTOs/Debugging/How_to_create_useful_crash_reports *** STEPS TO REPRODUCE 1. Have Multiple Nvida GPU's 970 and 3070 2. Have 6+ monitors 3. Configure layout for multiple monitors. 4. Set kernel parameters for Nvida GPU 5. Observed in Wayland and X 6. Tried configuration on 5.26.5 and 5.26.90 OBSERVED RESULT 2 Monitors connected 2 2nd GPU(970) have issues. Once configuration is finally set on reboot it is lost. Next getting it back is a tiresome process. I have to enable and disable the 2 monitors back and forth and can finally get them to work. Sometimes they show as enabled but the screen is blank. EXPECTED RESULT All monitors work with both GPU's and the configuration is preserved on reboot. SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: (available in About System) KDE Plasma Version: 5.26.90 or 5.26.5 KDE Frameworks Version: 5.102.0 Qt Version: 5.15.8 ADDITIONAL INFORMATION The Display Configuration setup now with this many monitors and them mostly all being the same model make it extremely difficult to identify the one you want to make primary. In the display configuration the monitor ID is not displayed. So when I hit identify I can't easily find what that relates to in the configuration. I have to disable each monitor and enable them one at a time to find out which is which. So not so much related to this bug but would be nice to make identifying monitors much easier as a side to this bug.
So you're saying there are multiple issues here? One issue is that the screens' arrangement gets lost on reboot, and the other issue is that sometimes screens show no output despite being enabled in the KScreen KCM? Do I have that right?
Yes that is correct. I think I have narrowed the output issue and the screen going blank to a refresh rate issues of some sort. I have to change a couple of the monitors down to a lower refresh rate that is not used in windows. I have all my monitors set to 60 hz in Windows on this same machine and they work fine.
Ok, let's use this bug report for the "not displaying any output due to a refresh rate problem" issue. Can you open a new one for the issue about the monitors' arrangements not being remembered as expected? Thanks!
Ok I can do that. After using now for a while and being on latest version. It appears that the layouts are being saved. I don't think that seems to be a problem anymore. The problem still exists where one monitor requires me to enable and disable and sometimes requires me to change the refresh rate back and forth to finally get it working. Its odd behavior but when I first boot to fresh desktop I have to enable disable change refresh rates to get 2 of the monitors working properly. The only other problem I seem to have when I power on a 7th monitor it blows up the monitor configuration and sends it into constant blinking screens. I will add this setup works fine in Windows 10. I can power monitors off/on at will and it make adjustments as needed. Maybe this is an Nvidia driver problem more than a KDE problem as a side thought.
Do all monitors have the same refresh rates? Are you running Plasma 5.27.2?
KDE: 5.27.2 Kernel: 6.2.2-1 Qt Version: 5.15.8 KDE Frameworks Version: 5.103.0 Monitors are not all the same refresh rate. I have however set them all to the same which they support and that doesn't change anything.
Thanks. When all monitors are plugged in and enabled as expected, can you attach a file with the output of `kscreen-console bug`?
Dear Bug Submitter, This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information as soon as possible and set the bug status as REPORTED. Due to regular bug tracker maintenance, if the bug is still in NEEDSINFO status with no change in 30 days the bug will be closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging If you have already provided the requested information, please mark the bug as REPORTED so that the KDE team knows that the bug is ready to be confirmed. Thank you for helping us make KDE software even better for everyone!
Created attachment 157754 [details] kscreen-console bug output
(In reply to Nate Graham from comment #7) > Thanks. When all monitors are plugged in and enabled as expected, can you > attach a file with the output of `kscreen-console bug`? I have attached the file but downside is I will be moving away from this monitor configuration in favor of much larger monitors and less screens that hopefully KDE will support. Going to Dual 43 inches and removing 5 of the 7 monitors. So I will have 4 total which will be supported by one graphics card hopefully. I already have one of the 43's that is going up for testing so I won't have this much longer to determine if the bug is fixed. I had most of the monitors disabled is why I never finished out this report in favor of testing out the KDE Zones feature not sure what its called but is like MS Fancy Zones. I think this will allow me to use less monitors and go for larger monitors that will support my need. I am running arch and have all that latest updates installed. I noticed when I re-enabled all the monitors that the configuration of them was a breeze and feels like something improved a little more potentially. When ever I had did this in the past I would have a lot of flickering forever as each monitor was powered on and it would sometimes lock up. This felt more like what I would experience in Windows.
A lot of work has gone into both multimonitor support as well as NVIDIA robustness in Plasma 6. Can I ask you to test with the Plasma 6 RC to see if it's fixed now?
This bug has been in NEEDSINFO status with no change for at least 30 days. The bug is now closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging Thank you for helping us make KDE software even better for everyone!