2.6.30-rc2 + xorg-intel-2.7.0 + DRM_I915_KMS = corruption

Florian Mickler florian at mickler.org
Mon Apr 27 14:49:47 PDT 2009

On Sun, 19 Apr 2009 07:27:35 +0100
Alex Bennee <kernel-hacker at bennee.com> wrote:

> Heading the warnings in the menuconfig I did try and ensure I have all
> the up to date parts of user-space. With KMS enabled GDM starts up but
> then corrupts the display with vertical lines. Disabling the kernel
> config and everything starts up fine, UXA acceleration seems OK and
> the speed of compiz is finally back up to ~60fps thanks to the A17
> fix.
> Am I missing another bit of user space for KMS to work properly?
> I am seeing a:
> [    6.751092] BUG: using smp_processor_id() in preemptible [00000000]
> code: modprobe/3078
> [    6.751100] caller is smp_call_function_many+0x29/0x1bd
> [    6.751103] Pid: 3078, comm: modprobe Not tainted 2.6.30-rc2-ajb
> #56
> But I think it's unrelated to any X woes. Shall detail in another
> message.

hm, are you using the xf86-video-intel git-branch "2.7"? if i use that,
i need a kernel fix queued in eanholts for-linus git-tree or else i
also get unusable X. 

i assumed that this was because of some not-yet-released fixes
on the 2.7-branch which will get released as soon as erics queue is
merged? but i didn't double check ...  maybe the released version is
also broken in this regard for me....

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