I also have a Toshiba Satellite M20 with the same problem. The Live CD works fine, but an installed system panics while "Mounting Root Filesystem" with IIRC the same error as Carmelo reports. Rarely, it doesn't panic at that step, but invariably panics while logging in. If I manage to get to recovery mode, it usually panics in short order. This behavior seems like Bug #45636.
This laptop has a SATA hard drive, which is probably the source of errors, since the live CD works fine. Strangely enough, mounting filesystems on the hard drive from the Live CD works, though I have not thoroughly tested this. This problem seems to manifest itself only when the root partition is being mounted from initramfs. The problem went away when I installed the 2.6.15-20 i386 kernel from the Dapper Beta CD. The problem is present in the final Dapper -23 kernel and the updated -25 kernel. However, the laptop sleep mode doesn't work in the older kernel, while it does work on the newer kernels (tested from the Live CD). -- kernel panic at boot https://launchpad.net/bugs/42909 -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
