Hans, Thanks so much for your detailed reply!
Cheers, Al On 10/2/24 6:26 AM, Hans de Goede wrote: > Reading this bug-report the issue seems to be that dell-uart-backlight > is non-functional in the 6.5.y kernels and completely missing in the > 24.04 6.8.y kernels. While in Ubuntu 23.04 with its 6.2 kernel dell- > uart-backlight is present and functional. > > The problem is that Canonical / Ubuntu wrote the original dell-uart- > backlight driver but the way it accessed the serial port was rather > hacky so it was never accepted upstream and it seems that when rebasing > to a new kernel Ubuntu dropped their downstream patch (after it broken > in 6.5.y ?). > > After I received the first bug reports about backlight issues on Dell > AIO systems a few months ago I have re-written the dell-uart-backlight > driver and submitted it upstream, this new rewrite was accepted upstream > in kernel 6.10 . > > So I expect that backlight control will start working again for you if you > upgrade > to kernel 6.10 or newer. > > I'm not an Ubuntu user myself, but there are unmodified mainline kernels > available for Ubuntu which allow you to update to 6.10.y without waiting > for Ubuntu to move to this kernel version. Here are some docs on this: > > https://itsfoss.com/upgrade-linux-kernel-ubuntu/ > https://wiki.ubuntu.com/Kernel/MainlineBuilds > -- *Al Heynneman* heynn...@gmail.com -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2067498 Title: Can't control display backlight in 24.04 on Dell AIO system To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2067498/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
