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LyCC

Member

Registered: 2012-09-05

Posts: 174

KDE/wayland and GPU card clock issue caused by kalarm

Hi everyone,

Does anyone experience the following issue recently with KDE/Wayland on NVidia cards?
Whenever something uses the GPU, for instance if I start a youtube video in firefox,
my nvidia gpu clocks up to full speed and stays there consuming 60-70 W, instead of the regular 10-12 W, despite the GPU
usage being 0-2% (basically nothing). Of course the fan speeds up to 45% and stays there.
i effectively have to log out of KDE in order for the GPU to properly clock down. I don't have this issue in LXDE.
Does this sound like a KDE bug or something related to wayland? Any thoughts on this?

EDIT: I tried stopping anything reported in nvtop using the card, basically plasma and wayland remained but the card still doesn't
want to clock down.

Edit2: after killing processes using the GPU one by one, I pinpointed to problem to kalarm. As soon as I restart this, the GPU clocks
up, and as soon as I kill it, everything is fine. The output of kalarm repeats the following over and over:

org.kde.pim.akonadiserver: Starting up the Akonadi Server...
QThreadStorage: entry 2 destroyed before end of thread 0x56556ef08890
QThreadStorage: entry 1 destroyed before end of thread 0x56556ef08890
org.kde.pim.akonadiserver: Failed to use database "akonadi"
org.kde.pim.akonadiserver: Database error: "Can't connect to local server through socket '/tmp/akonadi-user.ZB5DNG/mysql.socket' (2) QMYSQL: Unable to connect"
org.kde.pim.akonadiserver: Failed to connect to database!
org.kde.pim.akonadiserver: Database error: "Can't connect to local server through socket '/tmp/akonadi-user.ZB5DNG/mysql.socket' (2) QMYSQL: Unable to connect"
org.kde.pim.akonadiserver: Shutting down AkonadiServer...
org.kde.pim.akonadicontrol: Application '/usr/bin/akonadiserver' exited normally...
org.kde.pim.akonadicontrol: Service org.freedesktop.Akonadi.Control.lock already registered, terminating now.
Connecting to deprecated signal QDBusConnectionInterface::serviceOwnerChanged(QString,QString,QString)
qt.qpa.services: Failed to register with host portal QDBusError("org.freedesktop.portal.Error.Failed", "Could not register app ID: App info not found for 'org.kde.akonadi_control'")

Last edited by LyCC (2026-02-23 06:04:32)