[Bug 106422] i915 intel_tv_detect time out with recent kernels: [drm_kms_helper] flip_done timed out

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=106422

--- Comment #20 from Zakhar <alainb06 at free.fr> ---
I provided the i915.vbt as requested. I hope doing a sudo cp to /tmp worked ok.

The hardware (Dell Inspiron 1525) has:
- built in screen (1280x800)
- VGA-Out
- HDMI

With the workaround, I could test built-in screen and VGA-Out work fine. As for
HDMI, I don't have a cable (no big deal!)

Graphic acceleration is present.

There are no more messages in the log about slow graphics or timeouts, that is
even true for 14.04 (3.13 kernel) where we had messages but no timeout.

As for that hardware the workaround is perfect.

I have read the bissect procedure, considering how slow this old hardware is
(it takes quite a long time to compile a kernel!) and the fact that the
workaround is about a parameter to add in /etc/default/grub and works fine on
this PC with no adverse effect, I won't start bissecting.

I am then Ok with the "low" urgency on this bug. I'll remove the workaround if
you ever find why there is now some timeouts in recent kernels on this "TV
detection".

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