Ubuntu does not boot - probably deadlock

[Peter Júnoš]

Binary package hint: plymouth

Hello,

more Ubuntus (2x 10.04, 10.10 in testing phase and still now) does not boot, probably due to deadlock. It is random (it boots 1 in 10 chance), pressing some keys on keyboard helps (it boots with 1 in 2 chance). I tried changing graphic driver (one PC has ATI, 2 have NVidias), changing Wifi driver on notebook and it helps and somehow reduce probability of it happening, but it still happens with 2 in 3 chance. When I revert it back, it happens with old chances. Any hardware removed (wifi, addional harddisk) greatly reduces probability of this freezes. Removing or adding programs to be run at boot time also partially helps.

I can post logs, but I didn't find nothing interesting and common there. Frozen PC does not reply to NumLock/CapsLock, I can neither switch to different virtual terminal nor restart system with SysRQ key combination.

[Fred (eldmannen+launchpad)]

If it does not respond to NumLock/CapsLock or SysRq+REISUB then it sounds like a kernel panic.
disable splash screen and see if the kernel outputs anything interesting when it boots.

[Marius B. Kotsbak (mariusko)]

Please try without the "splash" command line option:

https://wiki.ubuntu.com/DebuggingKernelBoot

[Launchpad Janitor (janitor)]

[Expired for plymouth (Ubuntu) because there has been no activity for 60 days.]