Comment 4 for bug 849782

Yeah, it's a momentary event and the glitch at the 9-10s mark is it. I'm afraid I don't have any better recording technology to hand.

I've tried running the logs that you indicate, both with kms debugging and without. Nothing new comes up while the glitch occurs. For completeness:

[ 215.730] (II) intel(0): Modeline "1280x800"x0.0 59.26 1280 1328 1360 1440 800 803 809 823 -hsync -vsync (41.2 kHz)
[ 216.960] (II) intel(0): EDID vendor "LEN", prod id 16400
[ 216.960] (II) intel(0): Printing DDC gathered Modelines:
[ 216.960] (II) intel(0): Modeline "1280x800"x0.0 75.30 1280 1296 1344 1512 800 802 804 830 -hsync -vsync (49.8 kHz)
[ 216.960] (II) intel(0): Modeline "1280x800"x0.0 59.26 1280 1328 1360 1440 800 803 809 823 -hsync -vsync (41.2 kHz)
[ 284.441] (II) XKB: reuse xkmfile /var/lib/xkb/server-8D02A653A572D40EFDD32DCE670FE0A78BA780C8.xkm
[ 884.636] (II) intel(0): EDID vendor "LEN", prod id 16400
[ 884.636] (II) intel(0): Printing DDC gathered Modelines:
[ 884.636] (II) intel(0): Modeline "1280x800"x0.0 75.30 1280 1296 1344 1512 800 802 804 830 -hsync -vsync (49.8 kHz)
[ 884.636] (II) intel(0): Modeline "1280x800"x0.0 59.26 1280 1328 1360 1440 800 803 809 823 -hsync -vsync (41.2 kHz)

and:

[ 49.421907] input: HDA Intel Mic as /devices/pci0000:00/0000:00:1b.0/sound/card0/input9
[ 49.421997] input: HDA Intel Headphone as /devices/pci0000:00/0000:00:1b.0/sound/card0/input10
[ 49.422084] input: HDA Intel Headphone as /devices/pci0000:00/0000:00:1b.0/sound/card0/input11
[ 49.604842] ppdev: user-space parallel port driver
[ 50.358067] init: cgconfig post-stop process (1253) terminated with status 127
[ 50.361524] init: gdm main process (1241) killed by TERM signal
[ 57.773949] Bluetooth: RFCOMM TTY layer initialized
[ 57.773956] Bluetooth: RFCOMM socket layer initialized
[ 57.773959] Bluetooth: RFCOMM ver 1.11
[ 57.773967] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 57.773971] Bluetooth: BNEP filters: protocol multicast
[ 59.226573] init: plymouth-stop pre-start process (2457) terminated with status 1
[ 235.839172] wlan0: authenticate with 08:76:ff:6c:e7:59 (try 1)
[ 235.841239] wlan0: authenticated
[ 235.847520] wlan0: associate with 08:76:ff:6c:e7:59 (try 1)
[ 235.850047] wlan0: RX AssocResp from 08:76:ff:6c:e7:59 (capab=0x411 status=0 aid=1)
[ 235.850051] wlan0: associated
[ 235.854574] ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[ 246.528020] wlan0: no IPv6 routers present
[ 254.911679] init: nmbd pre-start process (2902) terminated with status 1

This behaviour was definitely *not* happening under natty.