Getting segfault when booting

ldoe3000 · Posted: Thu Jan 12, 2006 2:42 am Post subject: Getting segfault when booting

Using kernels 2.6.15 and 2.6.14-r6 I get segfaults when booting. I tried the 2005.0 LiveCD and get a seg fault when I try to chroot to /mnt/gentoo.. The last thing I did before things went south (I think it was January 6th) was an emerge, and there was a baselayout upgrade among others. I mention baselayout because I've had that cause other problems, but none this bad.

I'm at a loss here guys, any ideas about how I can diagnose and fix?
_________________
Athlon64 3500+ MSI Neo2 Platinum
2X74 WD Raptor Raid 0
2X512MB Crucial Ballistix
ATI x800XT PE (8.18.6)
SB Audigy 2 ZS
Dell 24" Widescreen LCD
Dual boot: Gentoo x86_64 2.6.13-r4 , Windows XP x64

ldoe3000 · Posted: Mon Jan 16, 2006 7:47 pm Post subject:

*bump*

The specific segfault I am getting is:

ldoe3000 · Posted: Mon Jan 16, 2006 10:02 pm Post subject:

More info, it appears to happen just after the

ldoe3000 · Posted: Mon Jan 16, 2006 10:42 pm Post subject:

more info, when I use the 2005.0 LiveCD, after mounting my partitions to /mnt/gentoo and /mnt/gentoo/boot I get the segmentation fault when I try to chroot. The message shown in a dmesg is:

jomen · Posted: Mon Jan 16, 2006 11:19 pm Post subject:

With my (really) limited knowledge...
To me it seems, your /bin/bash has been corrupted somehow - because it is the first thing to be executed, when you enter chroot - and also needed on normal boot...and the error indicates also, that bash is failing...
You could try to:
replace /bin/bash with that from the LiveCD - just copy it from the LiveCD
!!! - rename your original /bin/bash to /bin/bash_backup or something... before copying it over - just in case you need to get it back if it was not the failure!!!
Should it work then - check your CFLAGS for maybe too agressive optimizations, which might have caused this...
...it's just an idea I would try in such a case...

ldoe3000 · Posted: Tue Jan 17, 2006 12:35 am Post subject:

Good idea jomen, but it appears that it isn't bash that is crashing, but something else that bash relies on. I tried replacing with the version from the LiveCD and get the same problem. I tried downloading a binary of ksh, and while I can chroot successfully, modprobe, ls and a host of other commands cause memory faults. I noticed a glibc emerge on the last evening I was able to login, so perhaps that is causing me problems?
_________________
Athlon64 3500+ MSI Neo2 Platinum
2X74 WD Raptor Raid 0
2X512MB Crucial Ballistix
ATI x800XT PE (8.18.6)
SB Audigy 2 ZS
Dell 24" Widescreen LCD
Dual boot: Gentoo x86_64 2.6.13-r4 , Windows XP x64

ldoe3000 · Posted: Tue Jan 17, 2006 4:25 am Post subject:

Ok, I have a core dump file but can't seem to view it on my Fedora 32-bit machine.. Is there a way to view 64-bit core dump files in 32-bit Linux?
_________________
Athlon64 3500+ MSI Neo2 Platinum
2X74 WD Raptor Raid 0
2X512MB Crucial Ballistix
ATI x800XT PE (8.18.6)
SB Audigy 2 ZS
Dell 24" Widescreen LCD
Dual boot: Gentoo x86_64 2.6.13-r4 , Windows XP x64

juhah · n00b Joined: 03 Oct 2004 Posts: 46

The LiveCD should have memtest on it. Please, run memtest few times to make sure that that the ram is ok.

Next you should try different boot parameters like noapic to see if they make any difference. Please see http://www.gentoo.org/doc/en/handbook/handbook-amd64.xml?part=1&chap=2 for complete list.

ldoe3000 · Posted: Thu Jan 19, 2006 6:47 am Post subject:

I'm pretty sure it's not the memory, as I'm typing this from Windows now on the same machine.. Ah well, I'm going to call my Linux experiment over and redo my machine without the dual-boot. Windows XP x64 wins. I'll install Gentoo on my secondary machine..
_________________
Athlon64 3500+ MSI Neo2 Platinum
2X74 WD Raptor Raid 0
2X512MB Crucial Ballistix
ATI x800XT PE (8.18.6)
SB Audigy 2 ZS
Dell 24" Widescreen LCD
Dual boot: Gentoo x86_64 2.6.13-r4 , Windows XP x64

aidy · l33t Joined: 07 Apr 2005 Posts: 915

Why not just try reinstalling instead of going to WinXP64??? That's a piece of crap.