Hi, I'm experiencing issues with Xfce4 (ArchLinux and Debian) when forcing "tsc" clocksource on boot (due to a faulty BIOS implementation on my Thinkpad). The issues are: * Brightness/backlight constantly dims by itself. * System randomly suspends (s2idle [deep]), and upon resuming, it immediately suspends again, creating a loop. Switching quickly to a TTY is the only way to regain control. To avoid these issues it works best to: * keep Presentation Mode activated permanently * remove any tsc parameter on boot, so the system uses hpet clocksource Some key findings: * Both issues occur with Xfce on Debian and ArchLinux, but not with Xubuntu 24.04, regardless of the kernel version. * Other DEs (Plasma/debian, Gnome/fedora, Cinnamon/mint) perform correctly and as expected with tsc enabled. I've included the output of "xfconf-query -c xfce4-power-manager -lv" and "xfce4-power-manager --dump" from both Xubuntu 24.04.1 and Debian 12.6, which have similar configurations in the xfce4-power-manager-settings GUI. [xcquery-debian12.txt](/uploads/2f9c87696fd1facbf735114eea94ea02/xcquery-debian12.txt) [xcquery-xubuntu.txt](/uploads/70ad6bcf163b794a95b138d9fe75db6c/xcquery-xubuntu.txt) [xpm-debian12.txt](/uploads/53d33e82c271f8b470bda7c91f636c6e/xpm-debian12.txt) [xpm-xubuntu.txt](/uploads/564e63c30026eb086bbc56a9c2e557fb/xpm-xubuntu.txt)