Hi On 2015-06-07, Ville Syrjälä wrote: > On Fri, Jun 05, 2015 at 11:18:21PM +0200, Stefan Lippers-Hollmann wrote: > > Hi > > > > On 2015-04-20, Dave Airlie wrote: > > [...] > > > The following changes since commit 09d51602cf84a1264946711dd4ea0dddbac599a1: > > > > > > Merge branch 'turbostat' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux (2015-04-19 14:31:41 -0700) > > > > > > are available in the git repository at: > > > > > > git://people.freedesktop.org/~airlied/linux drm-next-merged > > > > > > for you to fetch changes up to 2c33ce009ca2389dbf0535d0672214d09738e35e: > > > > > > Merge Linus master into drm-next (2015-04-20 13:05:20 +1000) > > [...] > > > Ander Conselvan de Oliveira (28): > > [...] > > > drm/i915: Allocate connector state together with the connectors > > [...] > > > > This commit introduces a regression relative to v4.0 on an Intel > > D945GCLF2 mainboard[1] (Atom 330) with Intel 82945G/GZ onboard graphics > > using its (only-) VGA connector for me. > > > > v4.1-rc6-52-gff25ea8: > > [ 13.265699] BUG: unable to handle kernel NULL pointer dereference at 0000000000000010 > > [ 13.265723] IP: [<ffffffffa0556f01>] intel_modeset_update_connector_atomic_state+0x61/0x90 [i915] > > Hmm. Smells like a connector with a NULL state pointer, and the bad > commit touched exactly the part that sets it up. I can't immediately > spot any place where we'd forget to set it up though. > > Can you try with something like this so we'd at least find out which > connector(s) is/are at fault here? With the patch applied, the kernel (v4.1-rc6-104-g4b17069) locks up even harder, so I had to switch to a serial console in order to fetch the boot messages: [ 13.492784] connector = ffff880079bb8000 [ 13.910439] connector = ffff8800795b5800 [ 14.463114] connector = ffff8800795b6000 [ 14.700707] connector = ffff8800795b6800 [ 14.869418] connector = ffff8800795b7000 [ 14.923848] connector = ffff8800795b7000 Full, gzipped, bootlog attached - thanks a lot for your efforts. Regards Stefan Lippers-Hollmann
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