https://bugs.kde.org/show_bug.cgi?id=514106
Bug ID: 514106
Summary: Display Configuration repeatedly fails (REGRESSION)
Classification: Plasma
Product: plasmashell
Version First 6.4.5
Reported In:
Platform: Kubuntu
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Display Configuration widget and OSD
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: 1.0
Created attachment 188182
--> https://bugs.kde.org/attachment.cgi?id=188182&action=edit
Display Configuration locks-up at load time.
SUMMARY
This bug is a regression from Plasma 6.3 Kubuntu the 25.04. Since upgrading
to Kubuntu 25.10 Plasma 6.4 the Dispaly configuration panel and especially the
screen rotation and sceen orientation freatures continually lapse and get stuck
in incorrect properties. The Display Configuration widget itself fails on
start-up (lomg delay) and appears to reset before showing.
These features worked promptly and smoothly for the previous Kubuntu 25.04 on
this, the same laptop.
STEPS TO REPRODUCE
This is the most negative scenario.
1. Begin with a suspended laptop (Kubuntu)
2. Open laptop screen from Suspeend, with screen vertical and keyboard in your
lap (normal)
3. One every previouos version of Kubuntu until 25.04 the KDE screen refreshed
almost immediately on resume. The 25.10 screen and keyboard seem to be locked
for a good amount of time, more than a minute.
* One strategy is to click the power button which is set to show the
login/logout-menu and cancel the logout.
* That sometimes bring-up the screen in a more timely manner.
* It feels as if the display has got "stuck" and everything is locked until
it comes up
3. The screen (can be/is) stuck in up-side-down orientation
* That depends on the last orientation in use when suspend was used
4. The user must use the upside down screen
5. Open the launcher and select 'Display Configuration'
6. 'Display Configuration' shows as "Not Responding"
* see screenshot: Display-Conmfiguration.01:Not-Responding
* The PC is locked during this time. Keys, mouse, touchpad and touchscreen
do not respond.
* Including that command line is not working either until the Display
Configuration comes up.
7. When the Display Configuration finally comes-up you, the "Automatic" screen
orientation sub-section is not present.
* see screenshot: Display-Conmfiguration.02:Automatic-Missing
8. I found that swapping away from 'Display Configuration' to another pane,
e.g. 'Night Light', and then and re-select 'Display Configuration' should paint
the complete Display Configuration panel with the 'Automatic' orientaiton
section.
9. If you need to get to work quickly, you need to use the manual orientation
to set things right.
10. To actually apply the desired automatic screen orientation (again) you need
to change something and APPLY. Then change the Display Configuration to all
the desired settings and APPLY. If you do not make a first change, the changes
do not seem to "stick"
11. When you use APPLY the PC is locked-up and there is a very noticible delay
12. Once the orientation looks right can you can press KEEP.
13. Then test the orientaion settings by rotating the laptop. If eveything
works great! It usually does not.
14. When the settings are as desired, put laptop to SUSPEND. Close the
screen/lid.
15. Open the lid to resume the laptop.
16. Test the orientation settings by rotating the laptop and folding back the
screen.
17. By step 16 the laptop orientation seems to be stable for this session.
18. After SUSPEND and restart it is more common for the screen to again be
upside down.
* I do not think the settings have been lost, it is more as if there is
a failure on start-up and the software tries to restore things as they were at
the time of stopping, rather than honouring the lost configuration.
* But I'm guessing; largely because that PC lock-up at these times.
OBSERVED RESULT
As described above
1. PC lock-ups
2. Display Configruation lost and fields missing
3. Lock-up or no response during APPLY actions.
4. Display Configuration settings fail to persist
EXPECTED RESULT
I would like everyting to work nice and smoothly as it did with Plasma 6.3 /
Kubuntu 25.04
* I've seen posts on stackoverflow and other places suggesting the drivers for
screen rotation and stuff are not installed.
* I have previously checked all these settings and options. On this Kubuntu
25.10 installation all the necessary software to suppor the screen orientaion
WAS and Remains installed and working as expected when the configuration is
honoured.
* The screen roation and other fuctions Actually Work when the Dispklay
Configuration has beeb"reassembled" following the steps above.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Kubuntu 25.10
KDE Plasma Version: Plasma 6.4.5
KDE Frameworks Version: 6.17.0
Qt Version: 6.9.2
ADDITIONAL INFORMATION
Kernel Version: 6.17.0-8-generic (64-bit)
Graphics Platform: Wayland
Processors: 8 × 11th Gen Intel® Core™ i7-1165G7 @ 2.80GHz
Memory: 16 GiB of RAM (15.4 GiB usable)
Graphics Processor: Intel® Iris® Xe Graphics
* I don't have any idea where to look for error messages on this.
* There's noting obvious in the syslog
* One interesting thing to note is a fail to find locale metadata for en_AU
(Australian English)
* I saw this and felt that is strange since the PC has always been en_AU and
it seems to be working correctly for most things.
Thses issues could related to these symptoms -- This problem is very specific
and very time consuming to work-around.
* 166792 -- Endless wait at "updating system configuration
* There is a significant lag measured in minutes sometimes on the
display.
* Some documenation where the log can be found or command line alternative
would help to get a handle on this aspect of the situation.
* 413799 -- Screen settings panel: Presence of available inactive screens is
hard to determine
* I've seen fields missing
* I've seen dispaly of screens take a long time. The "Not Responding"
message is not always shown.
* The evnets I've seen seem to be more like something went wrong
initialising or displayin the panel and what I eventually see is a "best
guess". BUT ... When (or If) that has happened there is no mechanism to
Persist the settings on screen. Plasma only lets you do that if you changed
something, refere to step 10 abover, you seem to need that first change and
APPLY to "save" something and wipe or recreate what ever has been lost (as my
hypothieis would suggest).
Please let me know if there is a specific log I can look at.
--
You are receiving this mail because:
You are watching all bug changes.
