https://bugs.kde.org/show_bug.cgi?id=485837
Bug ID: 485837
Summary: x conf file being changed without confirmation
Classification: Plasma
Product: KScreen
Version: 6.0.4
Platform: Arch Linux
OS: Linux
Status: REPORTED
Severity: minor
Priority: NOR
Component: common
Assignee: kscreen-bugs-n...@kde.org
Reporter: a...@atikayda.au
Target Milestone: ---
SUMMARY
After updating the x conf file using nvidia settings to enable downscaling via
the ViewPortIn and ViewPortOut settings, the kscreen daemon edits the x conf
file during the login process to remove the edit. The edit remains commented
out, and a new line without the downscaling has taken its place.
STEPS TO REPRODUCE
1. Open the proprietary nvidia-settings applet with elevated privileges, with
two screens of different resolutions. In my instance, the two screens are 4K
and QHD
2. On the QHD screen, change the ViewPortIn setting to 4K (3840x2160). Leave
the viewport out setting at it's default value
3. Save the updates to the x conf file in the nvidia-settings applet. In my
case, this added the line
```Option "metamodes" "DP-2: nvidia-auto-select +0+0
{ForceCompositionPipeline=On, ForceFullCompositionPipeline=On}, DP-0:
nvidia-auto-select +3840+132 {viewportin=3840x2160,
ForceCompositionPipeline=On, ForceFullCompositionPipeline=On}"```
4. Reboot the device. At the login screen, the x conf file has not been
updated, and the downscaling is in place.
5. Login. The x conf file is updated by the kscreen daemon and the downscaling
is removed. In my instance, it looks like this
```# Removed Option "metamodes" "DP-2: nvidia-auto-select +0+0
{ForceCompositionPipeline=On, ForceFullCompositionPipeline=On}, DP-0:
nvidia-auto-select +3840+132 {viewportin=3840x2160,
ForceCompositionPipeline=On, ForceFullCompositionPipeline=On}"
Option "metamodes" "DP-2: nvidia-auto-select +0+0
{ForceCompositionPipeline=On, ForceFullCompositionPipeline=On}, DP-0:
nvidia-auto-select +3840+132 {ForceCompositionPipeline=On,
ForceFullCompositionPipeline=On}"```
OBSERVED RESULT
Valid x settings are removed on login, with no prompt or warning.
EXPECTED RESULT
Valid settings should be left intact, or a confirmation/warning should be
present so that the user is able to determine why their x conf file is being
updated.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: 6.8.7-arch1-1 (64-bit)
KDE Plasma Version: 6.0.4
KDE Frameworks Version: 6.2.0
Qt Version: 6.7.0
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