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seapotato
n00b
Joined: 28 Jan 2011
Posts: 30
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 Posted: Sat Mar 17, 2012 10:34 pm Post subject: Kernel panic when upgrading to 3.2 [SOLVED] |
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Hi all,
I've just tried updating to the 3.2 kernel and got a panic- Unable to mount root fs on unknown-block (2,0). As far as I can tell, I've got the file system and hard disk controller drivers built into the kernel, but it doesn't seem to help.
Here is the output of and my | Code: | | /usr/src/linux/.config |
file is at http://pastebin.com/embed_js.php?i=mEQL77iq
| Code: |
00:00.0 RAM memory: nVidia Corporation MCP67 Memory Controller (rev a2)
Subsystem: ASUSTeK Computer Inc. Device 16a7
00:01.0 ISA bridge: nVidia Corporation MCP67 ISA Bridge (rev a2)
Subsystem: ASUSTeK Computer Inc. Device 16a7
00:01.1 SMBus: nVidia Corporation MCP67 SMBus (rev a2)
Subsystem: ASUSTeK Computer Inc. Device 16a7
00:01.2 RAM memory: nVidia Corporation MCP67 Memory Controller (rev a2)
Subsystem: ASUSTeK Computer Inc. Device 16a7
00:01.3 Co-processor: nVidia Corporation MCP67 Co-processor (rev a2)
Subsystem: ASUSTeK Computer Inc. Device 16a7
00:02.0 USB Controller: nVidia Corporation MCP67 OHCI USB 1.1 Controller (rev a2)
Subsystem: ASUSTeK Computer Inc. Device 16a7
Kernel driver in use: ohci_hcd
00:02.1 USB Controller: nVidia Corporation MCP67 EHCI USB 2.0 Controller (rev a2)
Subsystem: ASUSTeK Computer Inc. Device 16a7
Kernel driver in use: ehci_hcd
00:04.0 USB Controller: nVidia Corporation MCP67 OHCI USB 1.1 Controller (rev a2)
Subsystem: ASUSTeK Computer Inc. Device 16a7
Kernel driver in use: ohci_hcd
00:04.1 USB Controller: nVidia Corporation MCP67 EHCI USB 2.0 Controller (rev a2)
Subsystem: ASUSTeK Computer Inc. Device 16a7
Kernel driver in use: ehci_hcd
00:06.0 IDE interface: nVidia Corporation MCP67 IDE Controller (rev a1)
Subsystem: ASUSTeK Computer Inc. Device 16a7
Kernel driver in use: pata_amd
00:07.0 Audio device: nVidia Corporation MCP67 High Definition Audio (rev a1)
Subsystem: ASUSTeK Computer Inc. Device 1339
Kernel driver in use: HDA Intel
00:08.0 PCI bridge: nVidia Corporation MCP67 PCI Bridge (rev a2)
00:09.0 IDE interface: nVidia Corporation MCP67 AHCI Controller (rev a2)
Subsystem: ASUSTeK Computer Inc. Device 16a7
Kernel driver in use: ahci
00:0a.0 Ethernet controller: nVidia Corporation MCP67 Ethernet (rev a2)
Subsystem: ASUSTeK Computer Inc. Device 1697
Kernel driver in use: forcedeth
00:0c.0 PCI bridge: nVidia Corporation MCP67 PCI Express Bridge (rev a2)
Kernel driver in use: pcieport
00:0d.0 PCI bridge: nVidia Corporation MCP67 PCI Express Bridge (rev a2)
Kernel driver in use: pcieport
00:12.0 VGA compatible controller: nVidia Corporation C67 [GeForce 7000M / nForce 610M] (rev a2)
Subsystem: ASUSTeK Computer Inc. Device 1692
Kernel driver in use: nouveau
Kernel modules: nouveau
00:18.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration
00:18.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address Map
00:18.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM Controller
00:18.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Miscellaneous Control
05:00.0 Ethernet controller: Atheros Communications Inc. AR5001 Wireless Network Adapter (rev 01)
Subsystem: Device 1a3b:1026
Kernel driver in use: ath5k
Kernel modules: ath_pci
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Last edited by seapotato on Sun Mar 18, 2012 7:06 pm; edited 1 time in total |
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BillWho
Veteran
Joined: 03 Mar 2012
Posts: 1600
Location: US
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| Posted: Sat Mar 17, 2012 11:45 pm Post subject: |
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seapotato
try adding root=/dev/sda? rootfstype=ext? to your grub kernel line - naturally replace the ? with the appropriate values
This has worked for others.... |
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Splink
Apprentice
Joined: 09 Feb 2005
Posts: 295
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| Posted: Sun Mar 18, 2012 9:36 am Post subject: |
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as you see the boot screen, press 'e' on there and edit the line.
By default grub uses /dev/ram0 for the root kernel image so you need to change this to your /boot partition.
my grub.conf is as follows for 3.2:
| Code: | title GENTOO 3.2.8
root (hd0,0)
kernel /boot/kernel root=/dev/sda2 real_root=/dev/sda2
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/dev/sda1 is my /boot folder, /dev/sda2 is my / folder which contains everything else.
_________________
It said "Requires Windows XP or better"
So I installed gentoo. |
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seapotato
n00b
Joined: 28 Jan 2011
Posts: 30
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| Posted: Sun Mar 18, 2012 10:16 am Post subject: |
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Thanks for the responses. I tried adding rootfstype=ext3 to grub so that my grub config for 3.2 now reads
| Code: |
title Gentoo Linux 3.2.1-r2
root (hd0,0)
kernel /boot/kernel-3.2.1-gentoo-r2 root=dev/sda3 rootfstype=ext3
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It still panics, but now it complains about the unknown block being (0,0) rather than (2,0). |
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Splink
Apprentice
Joined: 09 Feb 2005
Posts: 295
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| Posted: Sun Mar 18, 2012 10:56 am Post subject: |
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Ok first of all what I would do is post your fdisk configuration for your drive.
If you have a sda, sdb and sdc then grub might be thinking you have linux installed on sdc1 hence which it is referencing hd2,0.
bear in mind that /dev starts at 1 on partition types but grub uses 0 to start, so hd2,0 will actually be /dev/sdc1, so if /dev/sdc is where linux is installed then grub will just need to know which disk it is on.
If all this is ok, then grub should be able to boot. If it cant see where its /boot folder and is not even loading any part of the kernel then it is referencing a wrong partition.
Could you post your fstab out and do a fdisk -l of the disk which you have linux installed on.
It should look something like:
| Code: | fdisk /dev/sda -l
Disk /dev/sda: 320.1 GB, 320072933376 bytes
255 heads, 63 sectors/track, 38913 cylinders, total 625142448 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x97646c29
Device Boot Start End Blocks Id System
/dev/sda1 * 1 224909 112454+ 83 Linux
/dev/sda2 224910 307435904 153605497+ 83 Linux
/dev/sda3 307435905 610550324 151557210 83 Linux
/dev/sda4 610550325 625137344 7293510 82 Linux swap / Solaris
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_________________
It said "Requires Windows XP or better"
So I installed gentoo. |
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cach0rr0
Bodhisattva
Joined: 13 Nov 2008
Posts: 4123
Location: Houston, Republic of Texas
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| Posted: Sun Mar 18, 2012 11:20 am Post subject: |
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| Splink wrote: | as you see the boot screen, press 'e' on there and edit the line.
By default grub uses /dev/ram0 for the root kernel image so you need to change this to your /boot partition.
my grub.conf is as follows for 3.2:
| Code: | title GENTOO 3.2.8
root (hd0,0)
kernel /boot/kernel root=/dev/sda2 real_root=/dev/sda2
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/dev/sda1 is my /boot folder, /dev/sda2 is my / folder which contains everything else. |
just one minor nit - unless youre using an initramfs, having 'real_root' is superfluous, and 'root' is all that's necessary
real_root is for initramfs users, and it's an instruction that tells the initramfs - whose root will be a ramdisk - what to switch root to once the prep work is done
_________________
Lost configuring your system?
dump lspci -n here | see Pappy's guide | Link Stash |
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cach0rr0
Bodhisattva
Joined: 13 Nov 2008
Posts: 4123
Location: Houston, Republic of Texas
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| Posted: Sun Mar 18, 2012 11:29 am Post subject: |
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seapotato,
can you please do this, and tell me what the resultant output is
| Code: |
# mount /boot
# cd /usr/src/linux
# scripts/extract-ikconfig /boot/kernel-3.2.1-gentoo-r2 |grep SATA_AHCI
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0,0 == hdd controller support not found
so the big question is, why
2,0 is an error if you specify an initramfs, which says that no root could be found within an initramfs (i.e. youve specified root=/dev/ram0, but there's no root there)
I see your kernel config, SATA_AHCI support is in there, which is correct for your hardware, im just wondering if (maybe?) copying the kernel over didnt go as planned. That or maybe a thumb drive in the system is causing things to go wacky
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Lost configuring your system?
dump lspci -n here | see Pappy's guide | Link Stash |
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seapotato
n00b
Joined: 28 Jan 2011
Posts: 30
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| Posted: Sun Mar 18, 2012 2:27 pm Post subject: |
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/etc/fstab is
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# /etc/fstab: static file system information.
#
# noatime turns off atimes for increased performance (atimes normally aren't
# needed; notail increases performance of ReiserFS (at the expense of storage
# efficiency). It's safe to drop the noatime options if you want and to
# switch between notail / tail freely.
#
# The root filesystem should have a pass number of either 0 or 1.
# All other filesystems should have a pass number of 0 or greater than 1.
#
# See the manpage fstab(5) for more information.
#
# <fs> <mountpoint> <type> <opts> <dump/p$
# NOTE: If your BOOT partition is ReiserFS, add the notail option to opts.
/dev/sda1 /boot ext2 noauto,noatime 1 2
/dev/sda3 / ext3 noatime 0 1
/dev/sda2 none swap sw 0 0
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Output of fdisk is
| Code: |
Disk /dev/sda: 120.0 GB, 120034123776 bytes
255 heads, 63 sectors/track, 14593 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xbbc58b91
Device Boot Start End Blocks Id System
/dev/sda1 * 1 5 40131 83 Linux
/dev/sda2 6 137 1060290 82 Linux swap / Solaris
/dev/sda3 138 14593 116117820 83 Linux
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cach0rr0, when I follow your instructions, sure enough, I get an error. The output is
| Code: |
extract-ikconfig: Cannot find kernel config
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seapotato
n00b
Joined: 28 Jan 2011
Posts: 30
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| Posted: Sun Mar 18, 2012 2:40 pm Post subject: |
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| I just realized I'm an idiot and I get the error because I didn't set CONFIG_IKCONFIG=y. I'm rebuilding the kernel now and will post the output |
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seapotato
n00b
Joined: 28 Jan 2011
Posts: 30
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| Posted: Sun Mar 18, 2012 2:46 pm Post subject: |
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Here is the output of ikconfig
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CONFIG_SATA_AHCI=y
CONFIG_SATA_AHCI_PLATFORM=y
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So as far as I understand it, the kernel config is correctly set up for my hard drive, and ikconfig confirms the compiled kernel correctly built in support for my hd. Not sure what else it could be other than possibly a conflict? |
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Hu
Administrator
Joined: 06 Mar 2007
Posts: 21706
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| Posted: Sun Mar 18, 2012 5:31 pm Post subject: |
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| seapotato wrote: | | Code: | title Gentoo Linux 3.2.1-r2
root (hd0,0)
kernel /boot/kernel-3.2.1-gentoo-r2 root=dev/sda3 rootfstype=ext3
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Typically, root= specifies the absolute path to the block device. |
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seapotato
n00b
Joined: 28 Jan 2011
Posts: 30
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| Posted: Sun Mar 18, 2012 7:06 pm Post subject: |
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Thanks! I can't believe I didn't notice that. I must have read the grub config file about 5 times  |
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Installing Gentoo
