Good news :) The difference probably is within 7.2-rc5 kernel and the fix which is applied there for i915 (and xe too). However it seems like you have attached a wrong log, as it's the same as the previous one, so please attach the correct log you got after applying xe.enable_dpcd_backlight=2 with 7.2rc5.
So next steps to further investigate it would be to: 1. Get correct log for 7.2-rc5 with "xe.enable_dpcd_backlight=2 drm.debug=0x1e log_buf_len=4M" 2. Try to do the same but with 7.2rc4 (missing a fix for backlight control I've mentioned before) and including "xe.enable_dpcd_backlight=2 drm.debug=0x1e log_buf_len=4M" Please attach both logs so we can get it fixed or at least have a workaround for it for now. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2163244 Title: Ubuntu 26.04 LTS -- Lenovo Yoga 7 Pro 15IPH11 Screen Brightness not Working To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2163244/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
