Created attachment 332797 [details] kernel messages during boot with acpi=off Description of problem: During boot initrd stuff fails to mount real root filesystem, causing subsequent kernel panic. The acpi=off works around the bug. Version-Release number of selected component (if applicable): 2.6.27.15-78.2.23.fc9.i686 2.6.27.12-78.2.8.fc9.i686 and a couple of earlier, IIRC How reproducible: 100% Steps to Reproduce: Obvious Actual results: Expected results: Additional info: I've attached kernel boot log for acpi=off case. I've had no facilities to catch the messages for the case without acpi=off (kernel panics far before syslog starts). Is it possible to add a number of attachments to one bug report? Looks like I have to add more comments in order to attach outputs of `lcpsi -v' and /proc/cpuinfo. :(
Created attachment 332800 [details] lspci -v
Created attachment 332803 [details] /proc/cpuinfo
I see this same problem, but just with 2.6.27.15-78.2.23.fc9.i686. 2.6.27.12-78.2.8.fc9.i686 works just nicely.
Created attachment 332920 [details] lspci -vv output
Can you try replacing 'quiet' with 'vga=792 ignore_loglevel" in the kernel boot options, take a picture of the screen with a camera when it fails, and attach that? Also, try replacing 'acpi=off' with 'scsi_mod.scan=sync' and see if that works too.
Created attachment 334263 [details] Last screen of failed boot (vga=792 ignore_loglevel)
Created attachment 334264 [details] Last screen of failed boot (vga=792 ignore_loglevel scsi_mod.scan=sync)
Created attachment 334265 [details] Last screen of failed boot
Created attachment 334266 [details] MPEG of failed boot (vga=792 ignore_loglevel)) To my great regret this is the best quality I've manage to get (shooting conditions has been rather poor). :(
Created attachment 334267 [details] MPEG of failed boot (vga=792 ignore_loglevel scsi_mod.scan=sync) To my great regret this is the best quality I've manage to get (shooting conditions has been rather poor). :(
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