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1b1ed1a
(Get the code!)
For bug 106422 (marked as duplicate as this one) 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 one parameter to add in /etc/default/grub and works fine on this PC with no adverse effect, I won't start bissecting. Sorry for those that have a different hardware and might loose features with the workaround.
As far as I am concerned, I am 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".