Comment 34 for bug 614238

Have this issue with Ubuntu 11.04. Toshiba Satellite L645 laptop and Intel Integrated Graphics display.

I can get a temporary workaround by doing the following:

1) Open the laptop lid
2) Fn + F5 to scroll vid-modes, switches to "duplicate display", output fine on both heads but not desired res. on external.
3) Monitors > uncheck duplicate display, move external to primary position > Apply
4) Set desired resolution on external display > Apply
5) Turn off laptop display > Apply. Everything OK.

if 3, 4 and 5 are done in one step, it seems to hang X in a black screen state w/ only mouse cursor visible.

When I reboot or detach/reattach the external monitor, I get a purple wobble or blank screen on the external monitor and have to repeat steps 1 through 5. Sometimes I have to kill X to get back up. Is this an issue only w/ 64-bit Ubuntu? I'd happily switch to the 32-bit version to avoid it.