Present on 26.04 with the pc-kernel snap [7.0.0-15.15, 2026-04-30 (3419)] on a Dell XPS 16 from 2024.
Setting `i915.enable_psr=0` in the kernel cmdline previously fixed the issue on the same machine running ArchLinux. Here, setting `/etc/modprobe.d/i915.conf` ``` options i915 enable_psr=0 ``` doesn't seem to apply ``` ~$ sudo cat /sys/module/i915/parameters/enable_psr -1 ``` I had previously tried to add the option to `GRUB_CMDLINE_LINUX` in `/etc/default/grub`, but running `update-grub` generated an empty `grub.conf`, rendering my machine unbootable. I guess `pc-kernel` does something slightly differently here, but I don't know what, so that line of enquiry is blocked of for me at the moment. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2141643 Title: [i915][Meteor Lake/Arrow Lake] External monitors flicker with Dell TB4 dock, PSR warnings, fixed by enable_psr=0 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-hwe-6.14/+bug/2141643/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
