http://bugzilla.opensuse.org/show_bug.cgi?id=1040857
http://bugzilla.opensuse.org/show_bug.cgi?id=1040857#c5
--- Comment #5 from Takashi Iwai
I added the dmesg outputs for kernel 4.10.13-1-default and 4.11.4-1-default.
With the 4.10 kernel everything works fine. With the 4.11.4-1-default kernel, /sys/class/backlight/acpi_video0 shows up instead of /sys/class/backlight/intel_backlight and brightness cannot be changed even when changing the value of brightness in that directory.
Thanks. Through a quick glance, there is no significant difference between these two boot messages, so the bug doesn't appear there, unfortunately.
I also installed kernel 4.12 from OBS, but that one boots into a black screen with no messages.
That's bad. I guess the best option for now is to report to upstream. Care to open a bug report in bugzilla.freedesktop.org, category DRI/Intel? Feel free to add me (tiwai@suse.de) to Cc there in case you need any assistance. Maybe you'll be asked to open two bugs: one for the backlight regression and another for 4.12 breakage. Thanks. -- You are receiving this mail because: You are on the CC list for the bug.