Meh, forgotten to actually cc more lists ... -Daniel On Mon, Mar 4, 2013 at 6:49 PM, Daniel Vetter <daniel.vetter at ffwll.ch> wrote: > On Mon, Mar 4, 2013 at 6:11 PM, Chris Li <lkml at chrisli.org> wrote: >> To recap, the black screen first show up after the ACPI change to use widows 8 >> string. The i915_setmode function did not crash. The printk output >> from that function seems the same as the one that is in 3.6 kernel. >> I also include the 3.6 and 3.7 kernel dmesg. The black screen is 100% >> reproducible. >> >> Any suggestion how to further debug this i9515 black screen problem? >> I really want to get it fixed. > > Sorry for missing out on this one, I'll add a few more mailing lists to. > > Backlight issues themselves are usually a pain. I've looked through > your debug dmesg and there doesn't seem to be anything bad going on. > > Two things to test: > - Can you please check whether any of the backlight drivers in > /sys/class/backlight does anything? You need to frob the brightness > file. Please also list all the drivers you have. > - Please grab the lates git of intel-gpu-tools and attach the output > of intel_reg_dumper for both a working and a broken kernel. The git > tree is at: > > http://cgit.freedesktop.org/xorg/app/intel-gpu-tools/ > > Since backlight bugs usually take a lot of poking to figure out it > might be good to keep things together in a bugzilla report. > bugs.freedesktop.org, DRI -> DRM (Intel) is the preferred location, > please file a report there and attach the dump files (and the debug > dmesg logs we've gathered already). > > Thanks, Daniel > -- > Daniel Vetter > Software Engineer, Intel Corporation > +41 (0) 79 365 57 48 - http://blog.ffwll.ch -- Daniel Vetter Software Engineer, Intel Corporation +41 (0) 79 365 57 48 - http://blog.ffwll.ch
