Hi João, All, I've been helping a Fedora user debugging a problem where the backlight turns off and never turns on again with newer kernels: https://bugzilla.redhat.com/show_bug.cgi?id=1697069 At this point I'm pretty sure this commit is the culprit: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=78f3ac76d9e5 The breakage happens between 4.20.4 and 4.20.5 and that commit is the only one standing out; and blacklisting eeepc-wmi fixes things. For now I'm going to add a new DMI quirk for this (patch for this will follow later) but this is something to keep in mind if we get more reports about backlight/display breakage on eeepc laptops. I'm thinking that maybe the new behavior introduced by commit 78f3ac76d9e5 should only be applied to laptops using asus-nb-wmi and not to laptop using eeepc-wmi (the code modified by the commit is common to both drivers). João, can you check if the 11 models mentioned in the commit msg (or a bunch of similar models you have access too) are using asus-nb-wmi; or eeepc-wmi ? Regards, Hans
