screen flashes corrupt images during resume from hibernate

[Adriaan Peeters]

When I hibernate my machine (Dell Latitude D505) the screen immediately turns black. I see the harddisk led blinking for about one minute and then the device turns off.

When I resume the machine from this hibernate, the screen shows all kinds of corrupt images (vertical brown lines, some weird pixels) before returning to my working desktop.

Hibernate works perfectly, but a bit more verbose status screens would be appreciated. It looks a bit scary now ;)

[Matthew Garrett (mjg59)]

This is an unavoidable side-effect of the way that we reinitialise video, unfortunately.

[Trouilliez vincent (vincent-trouilliez-modulonet)]

I can confirm the problem... marking it as such, to decrease the number of "unconfirmed" bugs ;-)

[Paul Sladen (sladen)]

There's not really anything that can be done about this, except possibly some hacks to either try and turn the backlight off, or set all of the palette/CLUT entries to black.

Notice that the operative word here is /try/.

[Gabriel Bouvigne (bouvigne)]

A strange thing is that if you have a password dialog box when resuming from hibernation, the dialog is displayed on top of the background that is still showing garbage. I think that in this case, it should probably be possible to blank the screen before displaying the dialog box.

[Gabor Angler (angler-gabor)]

When I resume from suspend state, the screen refresh rate is not correct.
The screen flickers.
Check my bug report: https://bugs.launchpad.net/ubuntu/+bug/tft-flickering
Thank you!