Would appreciate any help, even if it just explains the weird behavior without solving the issue.
I know next to nothing about hardware, so I'm entirely confused at this point. Weirdly, pressing the disable touchpad combination (Fn + F7, works as intended) gets me the same, but once. I have tried acpi_listen, both combinations (Fn + Right, Fn + Left) produce 676AA15E-6A47- 000000bc 00000000 twice (I think one for press, one for lift, continuous if held). any solution requiring creating /usr/share/X11//nf did not work and broke something else (usually GUI, sometimes preventing system booting properly).xbacklight does not work, no output in the console.Sound over HDMI does not work properly with the newest driver, unfortunately. Not sure what broke it, but switching to the newest driver (460) in Software & Updates made the brightness keys work properly. I can still change the brightness with slider in Ubuntu's settings or by changing the value in /sys/class/backlight/intel_backlight/brightnessĪny solution I have found on the interned did not work. I was using older driver (390), because it was the only one that allowed me to play sound over HDMI. So, recently (roughly a week ago they were working) the brightness keyboard shortcuts on my Acer have stopped working.
