Tested with kernel 7.0.0-29-generic on the same ThinkPad T470 (i915, Intel HD Graphics 620) referenced in this report.
The backlight regression is still present: pressing the brightness keys (F6) shows the OSD indicator, but actual screen brightness does not change. Same symptom as previously reported on 7.0.0-28. Writing directly to /sys/class/backlight/intel_backlight/brightness also has no effect, consistent with prior testing. Reverted to 7.0.0-27-generic, where brightness control works normally again. Note: suspend/resume (lid close/open) was not re-tested on 7.0.0-29 in this round — will update if/when tested. System info: uname -r on failing kernel: 7.0.0-29-generic Only one backlight interface present: intel_backlight (no acpi_video0) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2161904 Title: i915 backlight brightness control broken on ThinkPad T470 after kernel 7.0.0-28 (works on -27) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2161904/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
