https://bugs.kde.org/show_bug.cgi?id=413116
Bug ID: 413116
Summary: Plasma freezes for few seconds when maximizing window
Product: kwin
Version: 5.16.5
Platform: Ubuntu Packages
OS: Linux
Status: REPORTED
Severity: major
Priority: NOR
Component: compositing
Assignee: kwin-bugs-n...@kde.org
Reporter: enautge...@gmail.com
Target Milestone: ---
SUMMARY
When using proprietary nvidia drivers (using an optimus laptop), if the modset
is activated (for disabling screen tearing in nvidia chips), and if a window is
dragged to the top of screen to maximize, sometimes (about 2/3 times) the
screen completely freezes for about 3-6 seconds. In the intel graphics card
there isn't any issues.
STEPS TO REPRODUCE
1. Install Kubuntu 18.04<(This issue is present in all versions above 18.04,
below i haven't tested, as they're unsupported)
2. Install the proprietary nvidia drivers
3. Make a config file such as '/etc/modprobe.d/nvidia-nomodset.conf' and add
the following line: 'options nvidia-drm modset=1' to disable screen tearing.
4.Update initramfs of the kernel (# update-initramfs -u) and reboot
5.Maximize any window by dragging to the top of the screen
OBSERVED RESULT
May the screen freeze for about 3-6 seconds, and then responds maximizing the
wanted window, but may occur really often. You may try maximizing until the
screen freezes.
EXPECTED RESULT
Maximize without screen freezes
SOFTWARE/OS VERSIONS
Windows:
macOS:
Linux/KDE Plasma: Kubuntu 18.04 and above
(available in About System)
KDE Plasma Version: 5.16.5 / 5.17
KDE Frameworks Version: 5.56 / 5.62.0
Qt Version: 5.12.2 / 5.12.4
ADDITIONAL INFORMATION
When the modset is not activated there are no freezes, but there is screen
tearing, which is not possible to fix from the compositor settings.
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