Public bug reported:
DKMS seems to use default (/usr/bin/gcc) GCC binary to build kernel
modules, without checking either it pointing to version of gcc used to
build kernel or not.
This can be problem when one uses update-alternatives to change default
GCC path to another GCC version. This causes modules to be built with
wrong gcc version, possibly crashing them and kernel itself (it was a
case with bbswitch module on my system).
Not only DKMS uses wrong GCC version, system also allowed to insert
modules compiled with wrong version of gcc.
davinchi@nirvana:~$ lsb_release -rd
Description: Ubuntu 12.04 LTS
Release: 12.04
# actually I updated from 11.10 to 12.04
davinchi@nirvana:~$ sudo apt-cache policy dkms
dkms:
Installed: 2.2.0.3-1ubuntu3
Candidate: 2.2.0.3-1ubuntu3
Version table:
*** 2.2.0.3-1ubuntu3 0
500 http://ru.archive.ubuntu.com/ubuntu/ precise/main amd64 Packages
100 /var/lib/dpkg/status
** Affects: dkms (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1008805
Title:
dkms uses wrong gcc version
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