On Thu, 28 Feb 2013, James Courtier-Dutton <james.dutton at gmail.com> wrote: > Bisect done on tree: > git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git > Worked on 3.7. > Broken on 3.8 > > Problem: "Backlight not coming on after resume." > git finally bisected for my Samsung Serial 7 Laptop. > Bisecting: 0 revisions left to test after this (roughly 0 steps) > [cf0a6584aa6d382f802f2c3cacac23ccbccde0cd] drm/i915: write backlight > harder <- This is the problem commit. Seems that fixing some > machines breaks others, based on the existing comments on that patch. The backlight haunts us again. Could you post the dmesg with drm.debug=0xe module parameter, first running vanilla 3.8, and then with the bad commit reverted, please? Might not be a bad idea to file a bug on Product=DRI, Component=DRM/Intel at https://bugs.freedesktop.org (see https://01.org/linuxgraphics/documentation/how-report-bugs-0 for details) and attach your bisect results and the dmesgs there. Thanks, Jani.
