On Mon, 2015-06-08 at 11:06 +0300, Ander Conselvan De Oliveira wrote:
On Sun, 2015-06-07 at 04:32 +0200, Stefan Lippers-Hollmann wrote:
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.
Could you repeat the process with drm.debug=0xe in your kernel command line and send the logs again?
Never mind, Ville's patch produced all the information necessary. Please give the patch I just sent a try.
Thanks, Ander