It happens to me too.
My Video card is SIS671 and I can't see anythinh durring the boot 'cause
the screen shakes a lot.
And after the boot process I just can use the 800x600 resolution because
sismedia driver doesn't work anymore.
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[RV515] Screen is shaking few minutes after boot
https://bugs
** Changed in: libimobiledevice (Ubuntu Precise)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/795475
Title:
[iOS5 devices do not work] Unhandled lockdow