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Bug#568608: Regression: Slow VT switching



gi1242 <gi1242+debianbugs@gmail.com> (05/02/2010):
> Package: xserver-xorg-video-intel
> Version: 2:2.9.1-2
> Severity: normal

Hi,

> After my recent xorg server upgrade, I find that switching VT's
> takes unusually long (about 8 seconds) when switching *BACK* to
> X. This happens every time I hibernate / resume for instance, and
> happens both with and without KMS.

thanks for the details.

> (I should add that I further upgraded to xserver-xorg 1:7.5+3, but
> the problem persists.)
> 
> The only error message I've got is
> 
>     [drm:i915_gem_madvise_ioctl] *ERROR* Attempted i915_gem_madvise_ioctl() on a pinned object
> 
> every time I switch back from the VT. Does anyone have any idea on
> how to fix this?

Please note I'm really ignorant, first. :) But I guess it could be
that the pinned object is locked somehow, and then becomes available
later, which could explain the delay?

(I've just checked drivers/gpu/drm/i915/i915_gem.c’s
i915_gem_madvise_ioctl() in linux-2.6 and that sounds possible.)

It'd be very nice if you could try latest kernel version as described
in this blog post:
  http://ikibiki.org/blog/2010/02/28/Where_have_you_been/

If you're still experiencing this issue, it'd be nice to have an
updated log, just in kind, so that I can forward it upstream.

Mraw,
KiBi.

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