Description of problem: On PXE boot, the kernel panics before the installer gets started. Will post full error message in next comment. Version-Release number of selected component (if applicable): 2.6.18-1.2717.el5 How reproducible: Always. Hardware: IBM Thinkpad T60p processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 14 model name : Genuine Intel(R) CPU T2500 @ 2.00GHz stepping : 8 cpu MHz : 1995.097 cache size : 2048 KB fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 10 wp : yes flags : fpu tsc msr pae mce cx8 apic mtrr mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe constant_tsc pni monitor vmx est tm2 xtpr bogomips : 4991.21 00:1f.1 IDE interface: Intel Corporation 82801G (ICH7 Family) IDE Controller (re v 02) 00:1f.2 SATA controller: Intel Corporation 82801GBM/GHM (ICH7 Family) Serial ATA Storage Controller AHCI (rev 02) 00:1f.3 SMBus: Intel Corporation 82801G (ICH7 Family) SMBus Controller (rev 02) 01:00.0 VGA compatible controller: ATI Technologies Inc M56GL [ATI Mobility Fire GL V5200] 02:00.0 Ethernet controller: Intel Corporation 82573L Gigabit Ethernet Controlle r 03:00.0 Network controller: Intel Corporation PRO/Wireless 3945ABG Network Conne ction (rev 02) 15:00.0 CardBus bridge: Texas Instruments PCI1510 PC card Cardbus Controller
Error message: md: autorun ... md: ... autorun DONE. EXT2-fs: unable to read superblock isofs_fill_super: bread failed, dev=md1, iso_blknum16, block=32 No filesystem could mount root, tried: ext2 iso9660 Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(9,1)
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This looks identical to the crash that jrb got on his t60p yesterday using the 1002 tree (kernel-2.6.18-1.2704.el5). We redid the install on the engineering VLAN using the 20061012 tree, which is the same kernel as used here, and it installed correctly. I wonder if there's something unique to the corporate vlan pxe server that's causing this. As far as I know, the PXE configs are identical for both VLANs now.
I don't think it's a corp VLAN problem because: 1. Zack was able to PXE install on this same laptop with the B1 tree from the corp VLAN. 2. Zack was also able to PXE install on a different laptop with the 2717 kernel yesterday. Since it doesn't take that long to reproduce, perhaps we should backtrack through the different milestone kernels to see if we can narrow down the regression? Of course, there are a lot of patches going in daily so not sure if that will help.
This binary search approach will be time consuming. Even if we do identify which milestone build it appeared in, getting the exact patch will be a decent amount of effort as well. We may have no choice but to go that way. However, as an additional data point, Richard can you try installing off the Engineering VLAN. Jeff does Engineering VLAN == Dogfood Network? Tom
I'm traveling the rest of the week, but the laptop is sitting on my desk if someone wants to try it (hit F12 at the boot screen to bring up the boot menu). I agree the binary search is time consuming. The good news, though, is that I estimate it will be a 5 minute cycle to check a single tree. So it's not TERRIBLE, just extremely tedious :-). If no one can test it out this week, I will get to it next week.
I was able to install RHEL fine on the engineering vlan on the T60p.
which kernel?
(Forgot to add, I'm running kernel-2.6.18-1.2717.el5 )
This was a typo on the initrd line on the corporate PXE server. All fixed now. Closing this as NOTABUG.