I also am hitting this. This looks to be a gen 9 graphics problem, as sforshee with gen 10 graphics appears unaffected.
I'm on a Dell Inspiron 5540 with an i9-9880H $ glxinfo | grep Device Device: Mesa DRI Intel(R) UHD Graphics 630 (Coffeelake 3x8 GT2) (0x3e9b) @tyhicks reported on #ubuntu-kernel his affected box was Device: Mesa DRI Intel(R) UHD Graphics 620 (Kabylake GT2) (0x5917) It appears that this might be limited to kaby and coffee lake generations of gpu. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1861521 Title: [FOCAL][REGRESSION] Intel Gen 9 brightness cannot be controlled To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-signed-5.4/+bug/1861521/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
