[Bug 100992] vblank wait timed out on crtc 0 after screen lock on Dell Latitude e6220

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=100992

--- Comment #1 from Thomas Nilefalk <thomas at junovagen.se> ---
This always happens after a screen lock, making the machine unusable since
there is no remedy except to reboot.

This is on a Dell Latitude e6220 with
- 4.4.0-77-generic
- 00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core
Processor Family Integrated Graphics Controller (rev 09)

(one thing that seems a bit strange is that the e6220 uses Intel HD Graphics
3000 as a part of its Sandy Bridge according to
https://www.notebookcheck.net/Dell-Latitude-E6220-Laptop-Review.63744.0.html,
but the logs refer to i915, is that normal?)

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