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neggard
n00b
Joined: 14 Apr 2008
Posts: 28
Location: Sweden
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 Posted: Wed Aug 12, 2009 8:57 am Post subject: [SOLVED] VFS: Cannot open root device |
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I have using genkernel and want to kompile another now.
But when I boot I got this error after a while in the boot process,
VFS: Cannot open root device "sda3" or unknown block (0,0)
Please append a correct "root=" boot option;
Kernel panic
This is my grub.conf
default 0
timeout 30
splashimage=(hd0,0)/boot/grub/splash.xpm.gz
title Gentoo Linux 2.6.29-r5
root (hd0,0)
kernel /boot/kernel-genkernel-x86_64-2.6.29-gentoo-r5 root=/dev/ram0 real_root=$
initrd /boot/initramfs-genkernel-x86_64-2.6.29-gentoo-r5
title Gentoo Linux 2.6.29-r5 egen
root (hd0,0)
kernel /boot/kernel-2.6.29-gentoo-r5 root=/dev/sda3 rootdelay=10
Is there something wrong or do I need something more in my kernel?
Last edited by neggard on Sat Aug 15, 2009 8:31 pm; edited 1 time in total |
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rndusr
Guru
Joined: 04 Dec 2005
Posts: 393
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| Posted: Wed Aug 12, 2009 1:06 pm Post subject: |
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How does your /etc/fstab look like? You can try adding real_root=/dev/sda3 as well to the kernel arguments. Sometimes that helps.
Why have you added the rootdelay option? Are you booting from USB? In that case, see if it helps with a longer delay.
Note that you can experiment with the options directly in grub, so you don't need to change the config file every time. 
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neggard
n00b
Joined: 14 Apr 2008
Posts: 28
Location: Sweden
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| Posted: Wed Aug 12, 2009 9:07 pm Post subject: |
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this is my fstab:
# 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
/dev/cdrom /mnt/cdrom auto noauto,ro 0 0
#/dev/fd0 /mnt/floppy auto noauto 0 0
/dev/sdb1 /mnt/80gig ext3 noatime 0 0
# glibc 2.2 and above expects tmpfs to be mounted at /dev/shm for
# POSIX shared memory (shm_open, shm_unlink).
# (tmpfs is a dynamically expandable/shrinkable ramdisk, and will
# use almost no memory if not populated with files)
shm /dev/shm tmpfs nodev,nosuid,noexec $
I add rootdelay because I read about it in the forum and that have help some of the users. |
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cach0rr0
Bodhisattva
Joined: 13 Nov 2008
Posts: 4123
Location: Houston, Republic of Texas
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| Posted: Wed Aug 12, 2009 10:18 pm Post subject: |
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In addition to /etc/fstab, please post the output of the following:
| Code: |
cat /proc/cpuinfo
lspci -n
ls -l /usr/src/linux
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ALSO: If you could, please post your kernel config to http://pastebin.ca and share the link with us
This error indicates you do not have support for your SATA or IDE controller built correctly into the kernel. As such the disk cannot be mounted/recognized.
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cach0rr0
Bodhisattva
Joined: 13 Nov 2008
Posts: 4123
Location: Houston, Republic of Texas
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| Posted: Wed Aug 12, 2009 10:21 pm Post subject: |
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| neggard wrote: |
I add rootdelay because I read about it in the forum and that have help some of the users. |
I normally only see people getting benefit from this when root is on an external drive, e.g. USB drive.
Your results may vary, but I don't know that you necessarily need it here.
Likely just need a new kernel. We can help with that
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neggard
n00b
Joined: 14 Apr 2008
Posts: 28
Location: Sweden
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| Posted: Thu Aug 13, 2009 9:05 am Post subject: |
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Here is all the info
cat /proc/cpuinfo
processor : 0
vendor_id : AuthenticAMD
cpu family : 16
model : 4
model name : AMD Phenom(tm) II X2 550 Processor
stepping : 2
cpu MHz : 3113.849
cache size : 512 KB
physical id : 0
siblings : 2
core id : 0
cpu cores : 2
apicid : 0
initial apicid : 0
fpu : yes
fpu_exception : yes
cpuid level : 5
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc rep_good nonstop_tsc pni monitor cx16 lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt
bogomips : 6227.69
TLB size : 1024 4K pages
clflush size : 64
cache_alignment : 64
address sizes : 48 bits physical, 48 bits virtual
power management: ts ttp tm stc 100mhzsteps hwpstate
processor : 1
vendor_id : AuthenticAMD
cpu family : 16
model : 4
model name : AMD Phenom(tm) II X2 550 Processor
stepping : 2
cpu MHz : 3113.849
cache size : 512 KB
physical id : 0
siblings : 2
core id : 1
cpu cores : 2
apicid : 1
initial apicid : 1
fpu : yes
fpu_exception : yes
cpuid level : 5
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc rep_good nonstop_tsc pni monitor cx16 lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt
bogomips : 6228.40
TLB size : 1024 4K pages
clflush size : 64
cache_alignment : 64
address sizes : 48 bits physical, 48 bits virtual
power management: ts ttp tm stc 100mhzsteps hwpstate
lspci -n
00:00.0 0600: 1002:5958
00:02.0 0604: 1002:5978
00:04.0 0604: 1002:597a
00:0a.0 0604: 1002:597f
00:11.0 0106: 1002:4390
00:12.0 0c03: 1002:4397
00:12.1 0c03: 1002:4398
00:12.2 0c03: 1002:4396
00:13.0 0c03: 1002:4397
00:13.1 0c03: 1002:4398
00:13.2 0c03: 1002:4396
00:14.0 0c05: 1002:4385 (rev 3a)
00:14.1 0101: 1002:439c
00:14.2 0403: 1002:4383
00:14.3 0601: 1002:439d
00:14.4 0604: 1002:4384
00:14.5 0c03: 1002:4399
00:18.0 0600: 1022:1200
00:18.1 0600: 1022:1201
00:18.2 0600: 1022:1202
00:18.3 0600: 1022:1203
00:18.4 0600: 1022:1204
01:00.0 0300: 10de:0615 (rev a2)
02:00.0 0106: 197b:2363 (rev 02)
02:00.1 0101: 197b:2363 (rev 02)
03:00.0 0200: 10ec:8168 (rev 03)
04:0e.0 0c00: 104c:8024
ls -l /usr/src/linux
lrwxrwxrwx 1 root root 22 Jul 2 04:22 /usr/src/linux -> linux-2.6.29-gentoo-r5
http://pastebin.ca/1527759 |
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neggard
n00b
Joined: 14 Apr 2008
Posts: 28
Location: Sweden
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| Posted: Thu Aug 13, 2009 9:37 am Post subject: |
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http://pastebin.ca/1527784
This is the .config in /usr/src/linux
the other where in /etc/kernels/ |
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h0mer`-
Apprentice
Joined: 02 Aug 2004
Posts: 215
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| Posted: Thu Aug 13, 2009 12:14 pm Post subject: |
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DEVICE_DRIVERS
->Serial ATA
->ATA SFF support
<*>ATI PATA Support
<*> JMicron PATA Support |
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cach0rr0
Bodhisattva
Joined: 13 Nov 2008
Posts: 4123
Location: Houston, Republic of Texas
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| Posted: Thu Aug 13, 2009 2:11 pm Post subject: |
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| neggard wrote: | http://pastebin.ca/1527784
This is the .config in /usr/src/linux
the other where in /etc/kernels/ |
mk, a few things
CONFIG_SATA_AHCI=m
needs to be
CONFIG_SATA_AHCI=y
CONFIG_PATA_ATIIXP=m
needs to be
CONFIG_PATA_ATIIXP=y
CONFIG_PATA_JMICRON=m
needs to be
CONFIG_PATA_JMICRON=y
Try making those changes first and foremost
Failing that, there are tonnes of items in this config that you simply do not need - highly recommend building your config from standard menuconfig rather than genkernel, and selecting ONLY the drivers you need.
The page in my sig should help with identifying em
For a mini HOWTO on working through menuconfig, have a look through my posts on this thread - https://forums.gentoo.org/viewtopic-t-787404-start-75.html
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neggard
n00b
Joined: 14 Apr 2008
Posts: 28
Location: Sweden
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| Posted: Fri Aug 14, 2009 9:57 pm Post subject: |
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This was harder than I expect.
Is there any general config file to use?
I dont want genkernal but a failsafe that you later can change to fit your system.
Should be good to have experience users to upload their config to a site and then you could download
if you have the same setup or at least same motherboard. |
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cach0rr0
Bodhisattva
Joined: 13 Nov 2008
Posts: 4123
Location: Houston, Republic of Texas
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| Posted: Fri Aug 14, 2009 10:14 pm Post subject: |
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| neggard wrote: | This was harder than I expect.
Is there any general config file to use?
I dont want genkernal but a failsafe that you later can change to fit your system.
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Realistically no, there's not really one generic config that you can use to get a working kernel.
Certain drivers conflict with each other, some cases you have two drivers that can handle a device, so building *everything* in results in either a painfully bloated, or in most cases, a completely non-functional system.
For most people I recommend following Pappy's guide and using a seed .config, building from there.
http://62.3.120.141/~pappy/
It really does take the guesswork out of configuring a bare bones kernel - the times when you see something enabled, and you're not sure what it does, but you're scared to delete it.
Truth be told, for most people there are only about a dozen or so drivers they need to have in their kernel - his guide shows you how to find out what driver is correct, and is where I got my signature from. Again, highly recommend it, as it'll greatly facilitate your kernel builds going forward.
| Quote: |
Should be good to have experience users to upload their config to a site and then you could download
if you have the same setup or at least same motherboard. |
I personally try and do this - http://whitehathouston.com/hardware
I still have a few to put up there
The problem is
a)some PC's that are identical in model number, might have different parts for whatever reason.
b)you still have to concern yourself with things such as file systems. For example, say you need XFS support, but I only build ext3 into my kernel - if you copy mine directly, and don't at least review it, your partitions formatted with XFS will be unable to mount - especially bad if your root is XFS as that'd prevent it from booting.
Such a thing would be a great starting point though, I do agree. I *will* say again though, pappy's seeds facilitate a large amount of this if you follow his guide.
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neggard
n00b
Joined: 14 Apr 2008
Posts: 28
Location: Sweden
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| Posted: Fri Aug 14, 2009 10:32 pm Post subject: |
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I should read and try the stuff on pappy.
I notice something...
when I use
make && make modules_install
I got some errors,
http://pastebin.ca/1529973 |
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cach0rr0
Bodhisattva
Joined: 13 Nov 2008
Posts: 4123
Location: Houston, Republic of Texas
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| Posted: Sat Aug 15, 2009 12:30 am Post subject: |
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failed kernel compiles make me nervous
but
| Code: |
CONFIG_INFINIBAND: │
│ │
│ Core support for InfiniBand (IB). Make sure to also select │
│ any protocols you wish to use as well as drivers for your │
│ InfiniBand hardware.
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You do not need this.
It's about the 8th or 9th from the bottom under "Device Drivers". Deselect the whole thing, save the config, see if it builds.
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neggard
n00b
Joined: 14 Apr 2008
Posts: 28
Location: Sweden
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| Posted: Sat Aug 15, 2009 8:29 pm Post subject: |
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When I'm using pappys page I got a working kernal.
Now I just have to get my screen and graphics working
Thanks for all the fast reply's and all you knowledege. |
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cach0rr0
Bodhisattva
Joined: 13 Nov 2008
Posts: 4123
Location: Houston, Republic of Texas
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| Posted: Sat Aug 15, 2009 8:30 pm Post subject: |
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Pappy++
Chalk another one up to the legend.
Please mark this thread as [SOLVED] by editing your original post. We can handle the graphics issues in another thread if need be
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pappy_mcfae
Watchman
Joined: 27 Dec 2007
Posts: 5999
Location: Pomona, California.
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| Posted: Tue Aug 18, 2009 6:26 am Post subject: |
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High five!
Blessed be!
Pappy
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