Garbled screen during install

[Phil Hughes]

Brought up Kubuntu Feisty on a T23 thinkpad (standard test machine for me). Clicked install and after Step 4, the screen ended up grabled. Re-started the install and picked 1024x768 resolution at boot time and the problem did not re-occur.

[Peter Whittaker (pwwnow)]

Confirmed based on 78298, which dupes this report: Problem in 78298 disappears when selecting 1024x768x16 from F4 options.

[Peter Whittaker (pwwnow)]

Note on previous comment: My install was Ubuntu Herd1 (not Kubuntu), on a ThinkPad A20m. My conclusion: Bug common to all Ubuntu/Kubuntu/etc. LiveCDs and common to at least part of the ThinkPad line.

See bug #78928 for dmidecode and lspci output for the A20m.

[Peter Whittaker (pwwnow)]

Rerouted to ubiquity, based on this being an installation problem (or at least a problem with installation).

[Phil Hughes (fyl)]

This same error occurs in herd 2 Kubuntu.

[Peter Whittaker (pwwnow)]

This error remains present in Feisty daily live 20070118 - the workaround of selecting 1024x768x16 also continues to work (so at least I was able to install).

[Patrice Vetsel (vetsel-patrice)]

I'v also this problem. I use ctrl+alt+F1 to switch to console and came back to X with alt+F7 to pass this bug.
I confirm too that when selecting resolution on boot the bug do not happen.

Tested on 2 differents PC + and under virtualbox on windows

[Peter Whittaker (pwwnow)]

It's funny, but the back-and-again workaround does not work for me (ctrl-alt-f1, ctrl-alt-f7) I just get back to black.

My only options are reboot, ctrl-alt-backspace, or "for file in `ps ax | cut -f 1 -d ' '`; do kill $file; done" from another console.

[Colin Watson (cjwatson)]

Thanks for your report. This is also bug 73955, and should be fixed in Herd 3.