Public bug reported:
I installed Ubuntu 12.04 from scratch using the amd64 live CD. When I
booted into the system, my mouse and 3d drivers were not working. I
eventially figured out that no kernel modules were being loaded at all
(lsmod showed absolutely nothing). Looking further, I realized that even
though the installed kernel was labeled as version 3.2.0-23, it was
actually 3.2.0-24 (for example, "uname -a" showed a 24 instead of a 23).
However, all the installed modules were for 3.2.0-23, so the kernel had
no modules available to it. Here is a look at the contents of /boot
after I fixed my system by installing the *real* kernel 3.2.0-24 as an
update:
root@aeolus:/boot# ls -l vmlinuz-3.2.0-2*
-rw-r--r-- 1 root root 4965776 May 2 14:01 vmlinuz-3.2.0-23-generic
-rw------- 1 root root 4965776 Apr 25 04:51 vmlinuz-3.2.0-24-generic
root@aeolus:/boot# file vmlinuz-3.2.0-2*
vmlinuz-3.2.0-23-generic: Linux kernel x86 boot executable bzImage, version
3.2.0-24-generic (buildd@yellow) #37-Ubuntu SMP Wed Apr 25 08:4, RO-rootFS,
swap_dev 0x4, Normal VGA
vmlinuz-3.2.0-24-generic: Linux kernel x86 boot executable bzImage, version
3.2.0-24-generic (buildd@yellow) #37-Ubuntu SMP Wed Apr 25 08:4, RO-rootFS,
swap_dev 0x4, Normal VGA
Note that the two kernel files both have the same version and are, as
far as I can tell, exactly the same file.
The kernel used by the Live CD itself is perfectly fine, and all the
modules get loaded just fine. This problem only happens on the installed
system. I did not select the option to install updates during the
install process.
This could be a pretty bad bug, because it could leave people with a
system that cannot connect to any network to download and install the
kernel update that fixes it. I had to boot into the Live CD and chroot
into my system in order to update the kernel.
** Affects: ubuntu
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/993752
Title:
12.04 amd64 live CD installs the wrong kernel, yielding a broken
system
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