This looks relevant. The DisplayPort connection is failing at the kernel or hardware level:
Oct 23 07:56:44 p7010 kernel: i915 0000:00:02.0: [drm] *ERROR* [CONNECTOR:262:DP-1][ENCODER:261:DDI TC1/PHY B] Invalid DPCD with no link rates, using defaults Oct 23 07:56:44 p7010 kernel: i915 0000:00:02.0: [drm] *ERROR* [CONNECTOR:262:DP-1][ENCODER:261:DDI TC1/PHY B] Invalid DPCD max lane count (0), using default Oct 23 07:56:47 p7010 kernel: i915 0000:00:02.0: [drm] *ERROR* [CONNECTOR:262:DP-1][ENCODER:261:DDI TC1/PHY B] Invalid DPCD with no link rates, using defaults Oct 23 07:56:47 p7010 kernel: i915 0000:00:02.0: [drm] *ERROR* [CONNECTOR:262:DP-1][ENCODER:261:DDI TC1/PHY B] Invalid DPCD max lane count (0), using default Oct 23 07:56:47 p7010 kernel: i915 0000:00:02.0: [drm] *ERROR* [CONNECTOR:262:DP-1][ENCODER:261:DDI TC1/PHY B] Invalid DPCD with no link rates, using defaults So I recommend trying a new DisplayPort cable. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/2127805 Title: Ubuntu 25.10 hangs on idle Status in gnome-shell package in Ubuntu: New Bug description: When the system idles long enough, the screensaver turns off the display. If you wait long enough (1+ hours) after that turn off, the system may hang when you move the mouse or hit the keyboard. This is reproducible. My Dell Optiplex desktop 7010 and 7020 both have this problem. My Dell Pro PC16255 laptop does not have this problem. Curiously, the desktops are both Intel while the laptop is AMD. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/2127805/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
