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Bug#595511: linux-image-2.6.32-5-686: Blacklisting KMS for i8xx makes xorg intel driver unusable on these chipsets

On 09/04/2010 08:00 PM, Soenke wrote:
the recent update of linux-image-2.6.32 to 2.6.32-21 disables KMS for
i8xx chipsets. This causes the xorg-video-intel driver to hang on X
startup on my system.

Yes, the situation for your i855 and previous intel chipset is in a bad shape.
For example look this (but there are other similar reports):

It's both a kernel and a xserver-xorg-video-intel problem, but more the latter. The kernel team is probably waiting to know if KMS should be enabled or not for these chipsets and is working in concert with the Ubuntu one for a common solution. On the X driver front, seems that the intel-gfx upstream developers are working to make KMS usable for our chipsets too, to avoid that distributions choose to fallback to UMS, to render the driver more maintenable and to make easier to port new features also to these not-so-new chipsets. From what i've read seems that on these chipsets there will be some performance penality in exchange to stability.
Looking here, seems there were lot of work recentely:

We will see when these changes will be released and if will be suitable for Squeeze.



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