Comment 9 for bug 537741

I believe I may be seeing the same symptom on a Sony Vaio VGN-FE41Z that contains an Nvidia GeForce Go 7600 (NV40) [Xorg: "Chipset: "NVIDIA NV4b"].

In this case though, it is hard to determine what precisely is causing it.

The symptom is that the plymouth splash screen remains with the "Press C to cancel checking disks" message, some disk activity is evident from occasional LED flashes, but the system doesn't respond to VT switch key-presses (Alt-F1 to Alt-F7) or any other key sequence. It responds to Alt+SysReq with S (sync disks), B (boot) but I didn't see any signs that K (Kill processes on tty) did anything useful - although it is possible that it had invisibly switched from tty7 without changing the display.

Examining the Lucid log files from the regular Karmic environment I couldn't see anything obvious in terms of errors, but I did notice that /var/log/Xorg.0.log had been written to but didn't seem to be complete.

At the time I looked I wasn't sure what the final entries in that log-file would usually be, but having managed a successful start it appears that Xorg gets 'stuck' after nouveau has started whilst additional modules are being loaded - I'll do another test to get a fresh log now I know what to look for.

In this case I found a workaround was to unplug the external DVI-D monitor from the docking station (the internal LVDS output was mirrored on the external DVI-D), so not sure if this bug is 'the one' on that basis.