[ltp] T410s and projector

[Leon Brokken]

Hi,

when I connect a projector/beamer to my T410s (via VGA) I can at best 
get a 'vibrating' screen. Difficult to explain - it's readable but 
annoying to the eye. I have so far only tested this with one projector. 
The same vibes occur during boot, before the X server has started.

Highest resolution on the projector is 1024x680. Using lower resolutions 
give the same or worse result.

Has any one noticed the same? Any tips to sort this out?

Here is some output:

Running 64bit Slackware current, with the latest Intel driver: 
xf86-video-intel-2.15.0-x86_64-1

leon [ ~ ]$ uname -a
Linux gonutz 3.0.0_toi #1 SMP Sat Jul 23 18:04:55 CEST 2011 x86_64 
Intel(R) Core(TM) i5 CPU       M 560  @ 2.67GHz GenuineIntel GNU/Linux

root [ /home/leon ]# lspci|grep VGA
00:02.0 VGA compatible controller: Intel Corporation Core Processor 
Integrated Graphics Controller (rev 02)

leon [ ~ ]$ lsmod|grep i915
i915                  488179  7
drm_kms_helper         25148  1 i915
drm                   184026  3 i915,drm_kms_helper
i2c_algo_bit            5232  1 i915
button                  4458  1 i915
i2c_core               19874  7 
lm75,videodev,i915,drm_kms_helper,drm,i2c_algo_bit,i2c_i801
video                  11219  1 i915
intel_agp              10896  1 i915
intel_gtt              14665  3 i915,intel_agp

These warnings appear when the projector is attached.

leon [ ~ ]$ grep WW /var/log/Xorg.0.log.old
[   276.761] (WW) intel(0): flip queue failed: Device or resource busy
[   276.761] (WW) intel(0): Page flip failed: Device or resource busy

All tips very welcome!

Cheers, Leon.