https://bugs.kde.org/show_bug.cgi?id=469094
Bug ID: 469094
Summary: GPU Memory Leak
Classification: Plasma
Product: plasmashell
Version: 5.27.4
Platform: Gentoo Packages
OS: Linux
Status: REPORTED
Severity: major
Priority: NOR
Component: Panel
Assignee: plasma-b...@kde.org
Reporter: forestofr...@gmail.com
CC: niccolo.venera...@gmail.com
Target Milestone: 1.0
SUMMARY
I have to logout/reboot my system often, due to GPU memory leaking? I notice it
mostly after locking my screen and coming back after several hours. It has been
happening for many months, can't even remember which version it started, only
hoping that the next release fixes the issue.
Similar issue can be seen using System Settings and selecting another scaling
factor and then revert. Do this several times and all GPU memory will be
consumed.
Possible relation to bug 428394.
My setup is three 4k monitors. One larger in the middle, with the other two in
portrait mode on each side. After a fresh boot, the GPU memory will be
anywhere from 2GB to 4.2GB. The range is all dependent upon KDE updates, not
each reboot on the same version.
Using nvidia-smi or nvtop, the process GPU usage does not add up to total
consumed.
Monitor setup
1. Left, 3840x2160 @ 200%, portrait, 27"
2. Center, primary, 3840x2160 @ 125%, 43"
3. Right, 3840x2160 @ 200%, portrait, 27"
STEPS TO REPRODUCE
1. Lock screen
2. Come back in a few hours or next morning
Alternative Steps
1. System settings, display and monitor
2. Change a screen scale, I selected the middle. Go from 125% to 100%
3. Revert
4. GPU memory usage climbed
5. Repeat scale and revert a few times
6. Be careful to not max out GPU memory
OBSERVED RESULT
GPU Memory almost doubled in the standard scenario.
The alternative steps, it will keep climbing on each scale/revert cycle.
EXPECTED RESULT
GPU memory usage would be nearly the same as before. Ideally, not use so much
to begin with.
SOFTWARE/OS VERSIONS
Operating System: Gentoo Linux 2.13
KDE Plasma Version: 5.27.4
KDE Frameworks Version: 5.105.0
Qt Version: 5.15.9
Kernel Version: 6.2.13-gentoo-dist (64-bit)
Graphics Platform: Wayland
Graphics Processor: NVIDIA GeForce RTX 3080/PCIe/SSE2
ADDITIONAL INFORMATION
Using the same monitor setup with a "trash can" mac, scales just as nice and
uses way less GPU memory, somewhere around 1GB.
Windows on the same computer, not as nice scaling between monitors, uses around
1.4GB GPU memory.
It would be a dream to see KDE on wayland under 2GB GPU. :)
After 3 change scale/revert cycles nvidia-smi output
Before
|=========================================+======================+======================|
| 0 NVIDIA GeForce RTX 3080 Off| 00000000:01:00.0 On |
N/A |
| 30% 41C P0 84W / 320W| 3716MiB / 10240MiB | 1%
Default |
| | |
N/A |
+-----------------------------------------+----------------------+----------------------+
+---------------------------------------------------------------------------------------+
| Processes:
|
| GPU GI CI PID Type Process name
GPU Memory |
| ID ID
Usage |
|=======================================================================================|
| 0 N/A N/A 1217 G /usr/bin/kwin_wayland
1475MiB |
| 0 N/A N/A 1583 G /usr/bin/Xwayland
29MiB |
| 0 N/A N/A 1591 G /usr/bin/ksmserver
3MiB |
| 0 N/A N/A 1603 G /usr/bin/kded5
3MiB |
| 0 N/A N/A 1678 G /usr/bin/plasmashell
753MiB |
| 0 N/A N/A 1730 G ...c/polkit-kde-authentication-agent-1
3MiB |
| 0 N/A N/A 1732 G ...ib64/libexec/xdg-desktop-portal-kde
3MiB |
| 0 N/A N/A 1867 G /usr/lib64/libexec/kdeconnectd
3MiB |
| 0 N/A N/A 1869 G /usr/bin/some_qt_app
3MiB |
| 0 N/A N/A 1878 G /usr/bin/kaccess
3MiB |
| 0 N/A N/A 1880 G /usr/bin/kalendarac
3MiB |
| 0 N/A N/A 2360 G /usr/lib64/libexec/baloorunner
3MiB |
| 0 N/A N/A 81264 G /usr/bin/krunner
27MiB |
| 0 N/A N/A 148708 G /usr/bin/konsole
3MiB |
| 0 N/A N/A 148925 G ...ble-features=WebRTCPipeWireCapturer
4MiB |
| 0 N/A N/A 151890 G /usr/bin/kate
3MiB |
+---------------------------------------------------------------------------------------+
|=========================================+======================+======================|
| 0 NVIDIA GeForce RTX 3080 Off| 00000000:01:00.0 On |
N/A |
| 30% 41C P0 84W / 320W| 6647MiB / 10240MiB | 0%
Default |
| | |
N/A |
+-----------------------------------------+----------------------+----------------------+
After
+---------------------------------------------------------------------------------------+
| Processes:
|
| GPU GI CI PID Type Process name
GPU Memory |
| ID ID
Usage |
|=======================================================================================|
| 0 N/A N/A 1217 G /usr/bin/kwin_wayland
1473MiB |
| 0 N/A N/A 1583 G /usr/bin/Xwayland
29MiB |
| 0 N/A N/A 1591 G /usr/bin/ksmserver
3MiB |
| 0 N/A N/A 1603 G /usr/bin/kded5
3MiB |
| 0 N/A N/A 1678 G /usr/bin/plasmashell
3435MiB |
| 0 N/A N/A 1730 G ...c/polkit-kde-authentication-agent-1
3MiB |
| 0 N/A N/A 1732 G ...ib64/libexec/xdg-desktop-portal-kde
3MiB |
| 0 N/A N/A 1867 G /usr/lib64/libexec/kdeconnectd
3MiB |
| 0 N/A N/A 1869 G /usr/bin/some_qt_app
3MiB |
| 0 N/A N/A 1878 G /usr/bin/kaccess
3MiB |
| 0 N/A N/A 1880 G /usr/bin/kalendarac
3MiB |
| 0 N/A N/A 2360 G /usr/lib64/libexec/baloorunner
3MiB |
| 0 N/A N/A 81264 G /usr/bin/krunner
27MiB |
| 0 N/A N/A 148708 G /usr/bin/konsole
3MiB |
| 0 N/A N/A 148925 G ...ble-features=WebRTCPipeWireCapturer
4MiB |
| 0 N/A N/A 151890 G /usr/bin/kate
3MiB |
| 0 N/A N/A 153731 G /usr/bin/systemsettings
250MiB |
+---------------------------------------------------------------------------------------+
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