Binary package hint: xserver-xorg-video-intel
On Gutsy Tribe-5, playing a video in Totem blanks the screen for about 2 seconds.
This does not seem to affect functionality, but looks a bit ugly.
[SRU]
Impact: For a variety of Intel graphics cards that include tv-out, the -intel driver in Gutsy cannot distinguish when there is something connected to tv-out, and enables it incorrectly, resulting in constraints on the resolution used in other outputs. This is a common issue but is very card-specific, so the fix is implemented as quirks that are applied on a card-by-card basis. As we find new cards with this bug, we simply add their pci ids to this quirk list, making it a very low-risk way to expand the fixes to additional chipsets, including ones not in production at the time of the distro release.
Explanation: This patch ports the tv-out quirks from Hardy's Xorg. These are all either provided by upstream or were arrived at through Ubuntu or Debian testing, and have been validated as correct. Hardy's Xorg actually includes a number of other kinds of quirks beyond tv-out, however those are dependent on larger changes in Xorg and thus would be more intrusive, so I've omitted them. This bug report (134365) describes this case with one of the cards, which had a quirk entered for Gutsy, but incorrectly; this patch fixes that entry as well as adding more entries.
Patch: http://launchpadlibrarian.net/12754698/09_sync_quirks_from_hardy.diff
Reproduction: The bug can be triggered on any machine with one of the graphics chipsets affected by this patch. Boot the system and run `xrandr`; the system will show tv-out to be enabled when it shouldn't, and likely will be set to an incorrect resolution. Display operations that use randr may also display unexpected screen blanking issues as the system tries to poll the non-existent output.
Regression potential: Essentially zero. All people with the cards these quirks apply to will have had this bug. Workarounds these users may have applied will not be affected and will continue to work. The quirks *only* apply to specific cards, so will not affect anyone else except those having this bug.
This happens for example with the "Experience Ubuntu.ogg" example video.
I have tested this on a Dell Latitude X1, using an i915GMS.