Daniel, ok, updated intel-gpu-tools and dumped the various config. Unfortunately, X froze when I tried the to switch to pipe C (--crtc 2). I have three dumps with the various config: http://maumae.net/retina/intel_corrupted_drm_debug/ird_inteldie << that's with i915.die=1 http://maumae.net/retina/intel_corrupted_drm_debug/ird_i915_loaded_notC_inX << that's with i915 loaded, within X, and not switched to pipe C (had restarted X after the freeze mentionned above) http://maumae.net/retina/intel_corrupted_drm_debug/ird_i915_loaded_from_fb << that with i915 loaded, switch to pipe C (probably not working) and done in a console (the freeze didn't affect the keyboard so I was able to switch VT). Probably not very useful. Hope that helps, Thanks, Francois On Tue 07 Aug 2012 22:53:42 EST, Daniel Vetter wrote: > On Tue, Aug 07, 2012 at 06:08:51PM +1000, Francois Rigaut wrote: >> Daniel, >> >> nope, the hack didn't succeed. No apparent change. > > Ok, I've updated the reg_dumper to also dump the registers for pipe C. Can > you please update your intel-gpu-tools checkout and then grab a new > register dump for both i915 loaded and not loaded? > > To make comparing easier, please switch the panel to pipe C when i915 is > loaded with > > $ xrandr --output eDP1 --auto --crtc 2 > > that way the register dumps are much easier to compare. > > Thanks, Daniel