Attached dmesg logs from both kernels for comparison: * dmesg-6.17.0-22-working.txt: brightness control works and /sys/class/backlight/nvidia_0 is present. * dmesg-6.17.0-35-broken.txt: brightness control is broken and /sys/class/backlight/ is empty.
The regression first appeared after 6.17.0-22 and remains present in 6.17.0-35. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2155617 Title: Backlight device disappears and brightness breaks on kernel 6.17.0-23+ (Lenovo Legion 5 Pro, NVIDIA hybrid graphics) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2155617/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
