Comment 3 for bug 761236

Hi Andres,

There have been a bunch of bugs filed about Arrandale with external monitors causing trouble. I've only seen one other bug where a flickering screen resulted (lp #758785), although the symptoms differed. I posted a few random ideas to that bug report to test out, I'm going to post a couple other random ideas here for you to try:

a) I've prepared a PPA which adds a DPMS on to the X driver. Please install this and then see if you can reproduce the bug:

https://launchpad.net/~bryce/+archive/elderberry

b) Upstream is staging several patches including some Ironlake/Arrandale fixes to one of their kernel drm branches. It would probably help them if you could test these before we forward this bug report to them. If you wish (and know how), you can build the kernel manually: http://git.kernel.org/?p=linux/kernel/git/ickle/drm-intel.git (branch drm-intel-next-proposed). If you don't know or don't wish to manually build the kernel, I'm asking the kernel team to start doing automatic daily builds of this tree; stay tuned and there will be .debs available of it probably within a day or two.