https://bugs.kde.org/show_bug.cgi?id=504889
Bug ID: 504889
Summary: Power Profile incorrectly shown when hardware does not
support it
Classification: Plasma
Product: plasmashell
Version First 6.3.5
Reported In:
Platform: Solus
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Power and Battery widget
Assignee: plasma-b...@kde.org
Reporter: kde...@tlcnet.info
CC: k...@privat.broulik.de, natalie_clar...@yahoo.de
Target Milestone: 1.0
SUMMARY
"Power Profile" is shown in Power and Battery *but* the system does not
support power profiles. The message says to install power-profiles-daemon
installed even whe power-profiles-daemon is installed
This is confusing. It makes it look like there's a bug in the applet detecting
the package being installed. This provides no valuable information to the user
when their system doesn't support using power-profiles-daemon.
Note: This was reported to Solus by a user on Plasma 6.3.5, I reproduced on
git-master
SYSTEM SETUP
A system with a CPU that does not support pstates e.g. any AMD earlier than
Zen2
power-profiles-daemon is installed, powerprofilesctl is running
Cheat sheet for AMD CPUs
https://www.pcgamer.com/heres-your-cheat-sheet-for-amds-zen-based-cpu-nomenclature/
Check with the following. If it says `amd-pstate`, pstate is supported,
otherwise it is not
cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_driver
STEPS TO REPRODUCE
1. Have / add a default panel with the system tray
2. Click on the Power and Brightness app
OBSERVED RESULT
"Power profiles" is shown with the message
"Power profiles may be supported on your device. Try installing the
power-profiles-daemon package using your distribution's package manager and
restarting the system"
EXPECTED RESULT
"Power profiles" is not shown
SOFTWARE/OS VERSIONS
Operating System: Solus 4.7
KDE Plasma Version: 6.3.5
KDE Frameworks Version: 6.14.0
Qt Version: 6.8.3
Kernel Version: 6.14.6-319.current (64-bit)
Graphics Platform: Wayland
Processors: 8 × AMD Ryzen 7 3700U with Radeon Vega Mobile Gfx
Memory: 17.5 GiB of RAM
Graphics Processor: AMD Radeon Vega 10 Graphics
Manufacturer: LENOVO
Product Name: 81SS
System Version: Lenovo IdeaPad FLEX-14API
$ powerprofilesctl
balanced:
PlatformDriver: placeholder
power-saver:
PlatformDriver: placeholder
ADDITIONAL INFORMATION
For systems where the CPU is not supported by power-profiles-daemon, telling
the user to install it is counter-productive. power-profiles-daemon conflicts
with other governers like scheduti, which supports some CPUs the former
doesn't.
The user report on the Solus forums:
https://discuss.getsol.us/d/11649-power-widget-cant-change-profiles-decrease-temperature-amd-zen-cpu-on-kde
The affected system has Plasma 6.3.5 and a AMD Zen+ Ryzen 5 2500U
On that system they have the same output from powerprofilesctl
huawei@huawei-solus ~ $ powerprofilesctl
balanced:
PlatformDriver: placeholder
power-saver:
PlatformDriver: placeholder
huawei@huawei-solus ~ $
SUGGESTION
If powerprofilesctl can be queried, and shows "PlatformDriver: placeholder", do
not show the Power Profile entry.
I don't know if there's a more robust way of determining if a particular system
CPU is supported by power-profiles-daemon to prevent the suggestion to install
it if it's not going to be supported
--
You are receiving this mail because:
You are watching all bug changes.
