On 27.10.2015 17:44, Michael Burian wrote: > On 10/27/15 03:36, Michel Dänzer wrote: >>> >>> [0] contains dmesg output with your patch applied (which fixes the backlight issue) >> >> This is very surprising: The patch just adds some debugging output, it's >> not supposed to have any functional effect. Also, I don't see any of the >> debugging output added by the patch in >> dmesg-4.3.0-rc7-00003-g85051e2-dirty-2015-10-26-11-00-41-radeon-bl-debug. >> > >> Are you sure that my patch was actually applied to the radeon driver >> when generating that file? Did you update the initrd with the patched >> radeon.ko? >> > > the build was done using "make -j4 deb-pkg" on a better equipped machine, > .deb packages were copied over and installed - maybe something interesting > happened > > AFAICT the patch should have been applied, at least it was shown with > git diff and the -dirty suffix was added by the build system, not me. > All graphics related drivers are compiled in (=y) rather than as > modules (=m) in .config. > > Another thing I tried yesterday was to add the old way right below the new one > (this fixes the backlight issue) enclosed by some debug statements that indicate > start / stop of the old / new method. (see atomdebug.diff - should be applied against > mainline) I'm not familiar with the ATOM bytecode, but since the number of bytecode instructions executed seems the same in both cases, I suspect that dig->backlight_level == 0 => ATOM_LCD_BLOFF is executed. (The debugging output in my patch would have provided all of this information and more, but there wasn't any of it in the dmesg you provided) I guess the question then becomes how dig->backlight_level is (supposed to be) initialized. What values do the following files contain in the broken and working cases? /sys/class/backlight/radeon_bl0/bl_power /sys/class/backlight/radeon_bl0/brightness /sys/class/backlight/radeon_bl0/actual_brightness /sys/class/backlight/radeon_bl0/max_brightness -- Earthling Michel Dänzer | http://www.amd.com Libre software enthusiast | Mesa and X developer _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
