kernel-188.8.131.52-43.fc11.i586 hangs during boot on my ThinkPad X61 laptop. The same problem appeared in all kernel-184.108.40.206-* releases as well. The last kernel which booted successfully was kernel-220.127.116.11-167.fc11.i586. I did not try any kernel-18.104.22.168-* release, so all I can say is that something broke between kernel-22.214.171.124 and kernel-126.96.36.199.
If I remove "quiet rhgb" from the kernel command line to try to see where it is hanging, I see various text stream by and then the display changes resolution and is cleared. At this point it hangs, showing only a blinking text cursor on the screen.
If I remove "quiet rhgb" and also add "i915.modeset=0" to the kernel command line, then I can see that the following were the last lines printed before the hang:
input: Video Bus as /devices/LNXSYSTM:00/device:00/PNP0A08:00/device:02/input/input6
ACPI: Video Device [VID] (multi-head: yes rom: no post: no)
[drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0 on minor 0
Searching for this in the dmesg output of a successful boot, I can see that the next text that *would* have appeared would probably be:
kjournald starting. Commit interval 5 seconds
EXT3-fs: mounted filesystem with ordered data mode.
Hopefully that gives a narrow-enough interval to help diagnose what went wrong. Personally, I suspect something video-related, but that might be a red herring.
Incidentally, once booting hangs, the kernel is not completely dead. It is still alive enough to respond to Control-Alt-Delete by printing the following messages before rebooting:
md: stopping all md devices.
sd 0:0:0:0: [sda] Synchronizing SCSI cache
URL field set to the affected machine's smolt profile, in case more hardware details are needed.
I maybe have same problem on ThinkPad X300.
Do you use PAE kernel?
My simple workaround is that, do not use kernel-PAE.
No, I am not using the PAE kernel.
Can you retry with Fedora 12 Beta LiveCD?
Fedora 12 Beta works fine.
Strictly speaking, I did not use a LiveCD, as the X61 model has no optical drive. I used liveusb-creator to build a bootable Fedora 12 Beta Live USB flash drive, which worked perfectly.
Oh, of course. I forgot to check that. But it should be equivalent in some way.
Thanks for reporting back. Apparently it will be fixed when Fedora 12 comes out.