https://bugs.kde.org/show_bug.cgi?id=505300
Bug ID: 505300
Summary: GPU monitor function wakes up discrete GPU
Classification: Applications
Product: plasma-systemmonitor
Version First unspecified
Reported In:
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: ksysguard-b...@kde.org
Reporter: kimibl...@icloud.com
CC: ahiems...@heimr.nl, plasma-b...@kde.org
Target Milestone: ---
SUMMARY
The default GPU usage widget wakes up the NVIDIA discrete GPU in a hybrid
graphics laptop.
STEPS TO REPRODUCE
1. Install NVIDIA drivers in hybrid graphics mode
2. Launch System Monitor
OBSERVED RESULT
GPU wakes up as reported by "cat /sys/class/drm/card*/device/power_state"
EXPECTED RESULT
System Monitor does not wake up discrete GPU if the GPU is in D3cold power
state.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Arch Linux rolling w/ KDE Unstable repo
KDE Plasma Version: 6.3.91
KDE Frameworks Version: 6.14.0
Qt Version: 6.9.1
ADDITIONAL INFORMATION
The power state of the GPU can be determined by
"/sys/class/drm/card*/device/power_state"
The former one should show D3cold and "/proc/driver/nvidia/gpus/*/power" should
show the following when a laptop support such power save feature:
Runtime D3 status: Enabled (fine-grained)
Video Memory: Off
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