Re: [lfs-support] Cannot boot to LFS with seperate boot partition
Hello,
On Thu, Jun 21, 2012 at 09:43:00AM +0430, Yasser Zamani wrote:
Hi there,
When I reboot to LFS with following /etc/fstab and /boot/grub/grub.cfg,
after selecting the boot menu, it tells me error: file not found
This means that grub (the bootloader) hasn't found the linux kernel.
snip
# Begin /etc/fstab
# file system mount-point type options dump fsck
# order
/dev/sda6 / ext3 defaults1 1
/dev/sda7 /boot ext3 defaults1 1
snip
# Begin /boot/grub/grub.cfg
set default=0
set timeout=5
insmod ext3
set root=(hd0,7)
menuentry GNU/Linux, Linux 3.4.1-lfs-SVN-20120617 {
linux /boot/vmlinuz-3.4.1-lfs-SVN-20120617 root=/dev/sda6 ro
}
snip
Then I tried following /boot/grub/grub.cfg instead; the result was getting
two
file not founds but after pressing key something takes place on screen then
the pc halts and CAPS LOCK and NUM LOCK's LEDs are flashing!
What do these LEDs flashing mean?
This means that the kernel was found, started running and
then hung. Usually this happens when the kernel doesn't find the root
partition. It also means that you are a little closer to finding a
solution because this time grub found the linux kernel.
snip
# Begin /boot/grub/grub.cfg
set default=0
set timeout=5
insmod ext3
set root=(hd0,7)
menuentry GNU/Linux, Linux 3.4.1-lfs-SVN-20120617 {
linux /vmlinuz-3.4.1-lfs-SVN-20120617 root=/dev/sda7 ro
}
snip
Could you please help me to understanding followings:
Which one takes place at first? Processing and applying
/etc/fstab or processing /boot/grub/grub.cfg. If second one takes place at
first so how it
finds out that where it should look for /boot?
The GRand Unified Bootloader (grub) processes /boot/grub/grub.cfg first.
After the kernel has booted, the system bootscripts read /etc/fstab.
If above two question's answers can not teach me the solution, so could you
please help
me to sort this problem out?
Thanks in advance!
Let's have a look at these lines from your second try:
set root=(hd0,7)
This line is correct as it tells grub to look for your boot partition.
This next line needs a little tweaking:
linux /vmlinuz-3.4.1-lfs-SVN-20120617 root=/dev/sda7 ro
^ ^^^
| |
| |
| This is where I think the error is.
This part is good.
root=/dev/XXX should match the root in /etc/fstab. In your case this would
be /dev/sda6.
Try:
linux /vmlinuz-3.4.1-lfs-SVN-20120617 root=/dev/sda6 ro
Also, you will find editing the /boot/grub/grub.cfg easier with vim.
There is a little bit of a learning curve, so finding an online tutorial
is a good idea.
Best of luck!
ae
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[lfs-support] glibc 5.7
why are the CC= AR= RANLIB= not set for glibc? as far i can understand, glibc will be built with the hosts compiler and not with the new one build in 5.5 as the new one didn't install reachable with the PATH-variable. in 5.8 binutils and 5.9 gcc will be built with the new compiler by specifying the CC/AR/RANLIB variables. further on these variables are no longer required, as in 5.9 the compiler will be installed to be found in the path. i just built glibc with CC/AR/RANLIB set as in 5.8 and 5.9. meanwhile i've rebuild glibc in chapter 6 without any issues. is there a good reason to build glibc with the host compiler instead of building with the new one from 5.5? tobias -- http://linuxfromscratch.org/mailman/listinfo/lfs-support FAQ: http://www.linuxfromscratch.org/lfs/faq.html Unsubscribe: See the above information page
Re: [lfs-support] glibc 5.7
On 6/21/2012 5:57 AM, Tobias Gasser wrote: why are the CC= AR= RANLIB= not set for glibc? as far i can understand, glibc will be built with the hosts compiler and not with the new one build in 5.5 as the new one didn't install reachable with the PATH-variable. in 5.8 binutils and 5.9 gcc will be built with the new compiler by specifying the CC/AR/RANLIB variables. further on these variables are no longer required, as in 5.9 the compiler will be installed to be found in the path. i just built glibc with CC/AR/RANLIB set as in 5.8 and 5.9. meanwhile i've rebuild glibc in chapter 6 without any issues. is there a good reason to build glibc with the host compiler instead of building with the new one from 5.5? tobias You should probably ask the developers this one, as unless the new version says otherwise, it's still a matter of taste and knowing what you're doing. Perhaps on some systems it would wreck them royally to use the new compiler instead of the host compiler. The email list for developers should be something like lfs-...@linuxfromscratch.org. I'd check on the site first, though, as you still have to subscribe to it. Elly -- http://linuxfromscratch.org/mailman/listinfo/lfs-support FAQ: http://www.linuxfromscratch.org/lfs/faq.html Unsubscribe: See the above information page
Re: [lfs-support] glibc 5.7
On Thu, 21 Jun 2012 11:57:19 +0100 Tobias Gasser l...@ebp-gasser.ch wrote: why are the CC= AR= RANLIB= not set for glibc? To quote from the glibc page http://www.linuxfromscratch.org/lfs/view/development/chapter05/glibc.html --host=$LFS_TGT, --build=$(../glibc-2.15/scripts/config.guess) The combined effect of these switches is that Glibc's build system configures itself to cross-compile, using the cross-linker and cross-compiler in /tools. Andy -- http://linuxfromscratch.org/mailman/listinfo/lfs-support FAQ: http://www.linuxfromscratch.org/lfs/faq.html Unsubscribe: See the above information page
Re: [lfs-support] glibc 5.7
Andrew Benton schrieb: On Thu, 21 Jun 2012 11:57:19 +0100 Tobias Gasser l...@ebp-gasser.ch wrote: why are the CC= AR= RANLIB= not set for glibc? To quote from the glibc page http://www.linuxfromscratch.org/lfs/view/development/chapter05/glibc.html --host=$LFS_TGT, --build=$(../glibc-2.15/scripts/config.guess) The combined effect of these switches is that Glibc's build system configures itself to cross-compile, using the cross-linker and cross-compiler in /tools. oops. sorry for the noise and thanks! tobias -- http://linuxfromscratch.org/mailman/listinfo/lfs-support FAQ: http://www.linuxfromscratch.org/lfs/faq.html Unsubscribe: See the above information page
Re: [lfs-support] Cannot boot to LFS with seperate boot partition
Date: Thu, 21 Jun 2012 01:05:45 -0600
From: e_lio...@hotmail.com
To: lfs-support@linuxfromscratch.org
Subject: Re: [lfs-support] Cannot boot to LFS with seperate boot partition
Hello,
On Thu, Jun 21, 2012 at 09:43:00AM +0430, Yasser Zamani wrote:
Hi there,
When I reboot to LFS with following /etc/fstab and /boot/grub/grub.cfg,
after selecting the boot menu, it tells me error: file not found
This means that grub (the bootloader) hasn't found the linux kernel.
snip
# Begin /etc/fstab
# file system mount-point type options dump fsck
# order
/dev/sda6 / ext3 defaults1 1
/dev/sda7 /boot ext3 defaults1 1
snip
# Begin /boot/grub/grub.cfg
set default=0
set timeout=5
insmod ext3
set root=(hd0,7)
menuentry GNU/Linux, Linux 3.4.1-lfs-SVN-20120617 {
linux /boot/vmlinuz-3.4.1-lfs-SVN-20120617 root=/dev/sda6 ro
}
snip
Then I tried following /boot/grub/grub.cfg instead; the result was getting
two
file not founds but after pressing key something takes place on screen
then
the pc halts and CAPS LOCK and NUM LOCK's LEDs are flashing!
What do these LEDs flashing mean?
This means that the kernel was found, started running and
then hung. Usually this happens when the kernel doesn't find the root
partition. It also means that you are a little closer to finding a
solution because this time grub found the linux kernel.
snip
# Begin /boot/grub/grub.cfg
set default=0
set timeout=5
insmod ext3
set root=(hd0,7)
menuentry GNU/Linux, Linux 3.4.1-lfs-SVN-20120617 {
linux /vmlinuz-3.4.1-lfs-SVN-20120617 root=/dev/sda7 ro
}
snip
Could you please help me to understanding followings:
Which one takes place at first? Processing and applying
/etc/fstab or processing /boot/grub/grub.cfg. If second one takes place at
first so how it
finds out that where it should look for /boot?
The GRand Unified Bootloader (grub) processes /boot/grub/grub.cfg first.
After the kernel has booted, the system bootscripts read /etc/fstab.
If above two question's answers can not teach me the solution, so could you
please help
me to sort this problem out?
Thanks in advance!
Let's have a look at these lines from your second try:
set root=(hd0,7)
This line is correct as it tells grub to look for your boot partition.
This next line needs a little tweaking:
linux /vmlinuz-3.4.1-lfs-SVN-20120617 root=/dev/sda7 ro
^ ^^^
| |
| |
| This is where I think the error is.
This part is good.
root=/dev/XXX should match the root in /etc/fstab. In your case this would
be /dev/sda6.
Try:
linux /vmlinuz-3.4.1-lfs-SVN-20120617 root=/dev/sda6 ro
Thanks a lot Andrew; Now, system can find Linux kernel and boot to the root :)
But at first, it tells error: file not found and I have to press a key to
continue; do you have any idea please?
Thanks!
Also, you will find editing the /boot/grub/grub.cfg easier with vim.
There is a little bit of a learning curve, so finding an online tutorial
is a good idea.
Best of luck!
ae
--
My Blog: http://elian001.wordpress.com
--
http://linuxfromscratch.org/mailman/listinfo/lfs-support
FAQ: http://www.linuxfromscratch.org/lfs/faq.html
Unsubscribe: See the above information page
--
http://linuxfromscratch.org/mailman/listinfo/lfs-support
FAQ: http://www.linuxfromscratch.org/lfs/faq.html
Unsubscribe: See the above information page
Re: [lfs-support] Cannot boot to LFS with seperate boot partition
On Thu, 21 Jun 2012 17:04:24 +0100 Yasser Zamani yasser.zam...@live.com wrote: Now, system can find Linux kernel and boot to the root :) But at first, it tells error: file not found and I have to press a key to continue; do you have any idea please? Could you post your grub.cfg please? Andy -- http://linuxfromscratch.org/mailman/listinfo/lfs-support FAQ: http://www.linuxfromscratch.org/lfs/faq.html Unsubscribe: See the above information page
Re: [lfs-support] Cannot boot to LFS with seperate boot partition
On Jun 21, 2012 9:04 AM, Yasser Zamani yasser.zam...@live.com wrote: Thanks a lot Andrew; Now, system can find Linux kernel and boot to the root :) OK, that part is solved. But at first, it tells error: file not found and I have to press a key to continue; do you have any idea please? We need a bit more info. This is equivalent to saying 'it doesn't work, ' We can,t help without more data. -- Bruce -- http://linuxfromscratch.org/mailman/listinfo/lfs-support FAQ: http://www.linuxfromscratch.org/lfs/faq.html Unsubscribe: See the above information page
