[REGRESSION] [KMS] [INTEL] Wrong resolution in console and XWindow

[Daniel Vetter]

On Wed, Jul 25, 2012 at 10:54:25AM +0200, Maciej Rutecki wrote:
> On środa, 25 lipca 2012 o 10:29:26 Daniel Vetter wrote:
> > On Wed, Jul 25, 2012 at 10:20:47AM +0200, Maciej Rutecki wrote:
> > > Last known good: 3.4.4
> > > First bad: 3.5.0
> > > 
> > > When booting 3.5.0 resolution (in console, and after in KDE) is set to
> > > 1024x768 (60Hz). In 3.4.4 was correct: 1440x900 (60Hz).
> > 
> > Can you please attach the output of xrandr --verbose for both kernels?
> > Also, please boot with drm.debug=0xe added to your kernel cmdline and grab
> > the dmesg (again for both kernels).
> > 
> 
> Thanks for the ansfer.
> 
> Here xrandr and dmesg outputs for 3.4.4 and 3.5.0
> 
> http://mrutecki.pl/download/kernel/3.5/swinka/debug/

Can you please test this quick hack:


diff --git a/drivers/gpu/drm/i915/intel_i2c.c b/drivers/gpu/drm/i915/intel_i2c.c
index 1991a44..abe1611 100644
--- a/drivers/gpu/drm/i915/intel_i2c.c
+++ b/drivers/gpu/drm/i915/intel_i2c.c
@@ -405,7 +405,7 @@ clear_err:
 	 * timing out seems to happen when there _is_ a ddc chip present, but
 	 * it's slow responding and only answers on the 2nd retry.
 	 */
-	ret = -ENXIO;
+	ret = 0;
 	if (wait_for((I915_READ(GMBUS2 + reg_offset) & GMBUS_ACTIVE) == 0,
 		     10)) {
 		DRM_DEBUG_KMS("GMBUS [%s] timed out after NAK\n",


Thanks, Daniel
-- 
Daniel Vetter
Mail: daniel at ffwll.ch
Mobile: +41 (0)79 365 57 48