Public bug reported:
I have a plain installation (no PPAs) of Ubuntustudio 26.04 and it is not
possible to change the default CPU frequency scaling governor from “powersave”
to “performance” at boot.
It is possible to change the governor with cpupower-gui manually with the
userspace program but it is not possible to use the “load profile at boot”
option.
Looking at the errors it looks as if a service wants to connect to the display
- very bad for a background service…
There seems to be a bug in cpupower-gui that crashes the services responsible
for setting the governor at boot:
Aug 30 09:30:23 Alcyone cpupower-gui[1653]: Handy.init()
Aug 30 09:30:23 Alcyone cpupower-gui[1653]:
/usr/share/cpupower-gui/cpupower_gui/window.py:127: Warning: g_object_get:
assertion 'G_IS_OBJECT>
Aug 30 09:30:23 Alcyone cpupower-gui[1653]: Handy.init()
Aug 30 09:30:23 Alcyone cpupower-gui[1653]:
gtk_style_context_add_provider_for_screen: assertion ‘GDK_IS_SCREEN (screen)’
failed
Aug 30 09:30:23 Alcyone cpupower-gui[1653]: gtk_icon_theme_get_for_screen:
assertion ‘GDK_IS_SCREEN (screen)’ failed
Aug 30 09:30:23 Alcyone cpupower-gui[1653]: gtk_icon_theme_add_resource_path:
assertion ‘GTK_IS_ICON_THEME (icon_theme)’ failed
Aug 30 09:30:23 Alcyone cpupower-gui[1653]: cannot open display:
Aug 30 09:30:23 Alcyone systemd[1]: cpupower-gui.service: Main process exited,
code=exited, status=1/FAILURE
Aug 30 09:30:23 Alcyone systemd[1]: cpupower-gui.service: Failed with result
‘exit-code’.
Aug 30 09:30:23 Alcyone systemd[1]: Failed to start cpupower-gui.service -
Apply cpupower-gui config at boot.
A similar bug has been reported on GitHub: service not starting · Issue
#148 · vagnum08/cpupower-gui · GitHub
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: cpupower-gui 1.0.0-6
ProcVersionSignature: Ubuntu 7.0.0-30.30-generic 7.0.12
Uname: Linux 7.0.0-30-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.34.1-0ubuntu0.1
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: KDE
Date: Mon Aug 31 18:53:02 2026
InstallationDate: Installed on 2026-08-13 (18 days ago)
InstallationMedia: Ubuntu-Studio 26.04 "Resolute Raccoon" - Release amd64
(20260423.1)
SourcePackage: cpupower-gui
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: cpupower-gui (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug resolute wayland-session
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https://bugs.launchpad.net/bugs/2165928
Title:
The application is unable to set the CPU scaling governor at boot.
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