Switch to kernel 3.6 made the system unbootable [Solved]

[msdobrescu]

Hello,

I have switched to the kernel 3.6 and now it cannot boot anymore.
It lists some modules loading then drops to some console.
My system is i7 920 + nVidia 560Ti.
I've tried to go to rescue mode, choose kernel 3.5 to boot, but still same issue.
What should I do to restore the OS (not to reinstall...)?

Thank you,
Mike

[Fitzcarraldo]

You could chroot using a LiveDVD/CD and try running kerner-switcher to revert to the kernel that worked.

[sabayonino]

You could chroot using a LiveDVD/CD and try running kerner-switcher to revert to the kernel that worked.

You mean kernel-switcher

To revert (3.5 Kernel)

Code: Select all

# kernel-switcher switch linux-sabayon:3.5

Good luck

[Fitzcarraldo]

You mean kernel-switcher

As the Japanese say, "sometimes even a monkey falls out of a tree".

[msdobrescu]

Thanks, but it did not work.
It did not change.
I have 3.5 and 3.6, both behave the same: "could not find the root block device in ."

[msdobrescu]

So, I have 3.5 and 3.6.
In both cases it asks for the root device, I give it (/dev/sda3) and it continues booting as it should.
What could I do?

[msdobrescu]

Here is my log for kernel switching:

Code: Select all

kernel-switcher switch linux-sabayon:3.6
>>  @@ Resources unlocked, let's go!
>>  @@ Calculating dependencies ...
>>  ## [R] [sabayonlinux.org] x11-drivers/nvidia-drivers-304.60#3.6.0-sabayon|0   [304.60|0|3.6.0-sabayon]
>>  ## [R] [sabayonlinux.org] sys-kernel/linux-sabayon-3.6-r1|0   [3.6-r1|0]
>>  ## [R] [sabayonlinux.org] app-emulation/virtualbox-modules-4.2.0-r1#3.6.0-sabayon|0   [4.2.0-r1|0|3.6.0-sabayon]
>>  @@ Packages needing to be installed/updated/downgraded: 3
>>  @@ Packages needing to be removed: 0
>>  @@ Download size: 0b
>>  @@ Freed disk space: 0.0b
>>  @@ You need at least: 95.9MB of free space
>>  :: (1/1) >>> 3 packages
>>    ## Package checksum matches: x11-drivers:nvidia-drivers-304.60#3.6.0-sabayon~0.tbz2
>>    ## Package checksum matches: sys-kernel:linux-sabayon-3.6-r1~0.tbz2
>>    ## Package checksum matches: app-emulation:virtualbox-modules-4.2.0-r1#3.6.0-sabayon~0.tbz2
>>  ++ (1/3) >>> x11-drivers/nvidia-drivers-304.60#3.6.0-sabayon
>>    ## Unpacking: x11-drivers:nvidia-drivers-304.60#3.6.0-sabayon~0.tbz2
>>    ## SPM: setup phase
>>    ## SPM: pre-install phase
>>    ## Installing package: x11-drivers/nvidia-drivers-304.60#3.6.0-sabayon
>>    ## [NVIDIA GPUs kernel drivers]
>>    ## Updating database: x11-drivers/nvidia-drivers-304.60#3.6.0-sabayon
>>    ## Cleaning previously installed application data.
>>    ## SPM: post-remove phase
 * Removing x11-drivers/nvidia-drivers-304.60 from moduledb.
>>    ## SPM: post-install phase
 * Updating module dependencies for 3.6.0-sabayon ...                                                                                                     [ ok ]
 * Adding module to moduledb.

 * You must be in the video group to use the NVIDIA device
 * For more info, read the docs at
 * http://www.gentoo.org/doc/en/nvidia-guide.xml#doc_chap3_sect6
 *
 * This package installs a kernel module and X driver. Both must
 * match explicitly in their version. This means, if you restart
 * X, you must modprobe -r nvidia before starting it back up
 *
>>    ## Cleaning: x11-drivers/nvidia-drivers-304.60#3.6.0-sabayon
>>  ++ (2/3) >>> sys-kernel/linux-sabayon-3.6-r1
>>    ## Unpacking: sys-kernel:linux-sabayon-3.6-r1~0.tbz2
>>    ## SPM: setup phase
 * Preparing kernel and its modules
>>    ## SPM: pre-install phase
 *
 * To avoid automounting and auto(un)installing with /boot,
 * just export the DONT_MOUNT_BOOT variable.
 *
 *
 * Assuming you do not have a separate /boot partition.
 *
>>    ## Installing package: sys-kernel/linux-sabayon-3.6-r1
>>    ## [Official Sabayon Linux Standard kernel image]
>>    ## Updating database: sys-kernel/linux-sabayon-3.6-r1
>>    ## SPM: pre-remove phase
 *
 * To avoid automounting and auto(un)installing with /boot,
 * just export the DONT_MOUNT_BOOT variable.
 *
 *
 * Assuming you do not have a separate /boot partition.
 *
>>    ## Cleaning previously installed application data.
>>    ## SPM: post-remove phase
** Removing kernel '/boot/kernel-genkernel-x86_64-3.6.0-sabayon' and initramfs '/boot/initramfs-genkernel-x86_64-3.6.0-sabayon'
** Configuring GRUB bootloader. Removing the selected kernel ...
/var/tmp/entropy/sys-kernel_linux-sabayon-3.6-r1/portage/._unmerge_/sys-kernel/linux-sabayon-3.6-r1/temp/environment: line 3780: /sbin/grub-mkdevicemap: No such file or directory
Generating grub.cfg ...
Found background: /boot/grub/default-splash.png
Found linux image: /boot/kernel-genkernel-x86_64-3.6.0-sabayon
Found initrd image: /boot/initramfs-genkernel-x86_64-3.6.0-sabayon
Found linux image: /boot/kernel-genkernel-x86_64-3.5.0-sabayon
Found initrd image: /boot/initramfs-genkernel-x86_64-3.5.0-sabayon
  No volume groups found
Found Windows 7 (loader) on /dev/sda1
done

 * You are currently booting with kernel:
 * kernel-genkernel-x86_64-3.6.0-sabayon
 *
 * Use 'eselect bzimage' in order to switch between the available ones

>>    ## SPM: post-install phase
 * Removing extents option for ext4 drives from /etc/fstab
 * Updating boot splash for /boot/initramfs-genkernel-x86_64-3.6.0-sabayon
 * Updating boot splash for /boot/initramfs-genkernel-x86_64-3.5.0-sabayon
** Adding kernel '/boot/kernel-genkernel-x86_64-3.6.0-sabayon' and initramfs '/boot/initramfs-genkernel-x86_64-3.6.0-sabayon'
** Configuring GRUB bootloader. Adding the new kernel ...
** Cannot find grub. Cannot properly configure kernel
/var/tmp/entropy/packages/amd64/5/sys-kernel_linux-sabayon-3.6-r1_0.tbz2/portage/sys-kernel/linux-sabayon-3.6-r1/temp/environment: line 3782: /sbin/grub-mkdevicemap: No such file or directory
Generating grub.cfg ...
Found background: /boot/grub/default-splash.png
Found linux image: /boot/kernel-genkernel-x86_64-3.6.0-sabayon
Found initrd image: /boot/initramfs-genkernel-x86_64-3.6.0-sabayon
Found linux image: /boot/kernel-genkernel-x86_64-3.5.0-sabayon
Found initrd image: /boot/initramfs-genkernel-x86_64-3.5.0-sabayon
  No volume groups found
Found Windows 7 (loader) on /dev/sda1
done

 * You are currently booting with kernel:
 * kernel-genkernel-x86_64-3.6.0-sabayon
 *
 * Use 'eselect bzimage' in order to switch between the available ones


 * If you are upgrading from a previous kernel, you may be interested
 * in the following document:
 *   - General upgrade guide: http://www.gentoo.org/doc/en/kernel-upgrade.xml

 * Updating module dependencies for 3.6.0-sabayon ...
ignored deprecated option -r                                                                                                                              [ ok ]
 * Please report kernel bugs at:
 * http://bugs.sabayon.org
 * The source code of this kernel is located at
 * =sys-kernel/sabayon-sources-3.6-r1.
 * Sabayon Linux recommends that portage users install
 * sys-kernel/sabayon-sources-3.6-r1 if you want
 * to build any packages that install kernel modules
 * (such as ati-drivers, nvidia-drivers, virtualbox, etc...).
>>    ## Cleaning: sys-kernel/linux-sabayon-3.6-r1
>>  ++ (3/3) >>> app-emulation/virtualbox-modules-4.2.0-r1#3.6.0-sabayon
>>    ## Unpacking: app-emulation:virtualbox-modules-4.2.0-r1#3.6.0-sabayon~0.tbz2
>>    ## SPM: setup phase
>>    ## SPM: pre-install phase
>>    ## Installing package: app-emulation/virtualbox-modules-4.2.0-r1#3.6.0-sabayon
>>    ## [Kernel Modules for Virtualbox]
>>    ## Updating database: app-emulation/virtualbox-modules-4.2.0-r1#3.6.0-sabayon
>>    ## Cleaning previously installed application data.
>>    ## SPM: post-remove phase
 * Removing app-emulation/virtualbox-modules-4.2.0-r1 from moduledb.
>>    ## SPM: post-install phase
 * Updating module dependencies for 3.6.0-sabayon ...                                                                                                     [ ok ]
 * Adding module to moduledb.
 * Starting with the 3.x release new kernel modules were added,
 * be sure to load all the needed modules.
 *
 * Please add "vboxdrv", "vboxnetflt" and "vboxnetadp" to:
 * /etc/conf.d/modules
>>    ## Cleaning: app-emulation/virtualbox-modules-4.2.0-r1#3.6.0-sabayon
>>  @@ Installation complete.
Switching to nvidia OpenGL interface... done
>> sys-kernel/linux-sabayon-3.6-r1 has been installed.
>> Attention: some external drivers cannot work across multiple kernels.
>> Please reboot your computer now !


There is an error:

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Cannot find grub. Cannot properly configure kernel
/var/tmp/entropy/packages/amd64/5/sys-kernel_linux-sabayon-3.6-r1_0.tbz2/portage/sys-kernel/linux-sabayon-3.6-r1/temp/environment: line 3782: /sbin/grub-mkdevicemap: No such file or directory


Any idea what happens?

Thank you.

[sabayonino]

uhm ...

run :

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# mount /boot && grub2-mkconfig -o /boot/grub/grub.cfg

[nachoig]

uhm ...

run :

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# mount /boot && grub2-mkconfig -o /boot/grub/grub.cfg

But it's necessary to mount with write permissions, isn't it? Like this:

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# mount -o remount,rw /boot && grub2-mkconfig -o /boot/grub/grub.cfg

[msdobrescu]

Code: Select all

mount /boot && grub2-mkconfig -o /boot/grub/grub.cfg
mount: can't find /boot in /etc/fstab


Running equo upgrade, then equo update, revealed that some more upgrades were to be done.
Now, kernel 3.6-r3 is installed.
At reboot, grub have reset in a loop, so I've reinstalled grub from the live dvd.

Something very wrong there is..