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Message #93360
[Bug 1376966] Re: gpu-manager treats all files in /etc/modprobe.d as config files
What is the test case for this SRU?
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https://bugs.launchpad.net/bugs/1376966
Title:
gpu-manager treats all files in /etc/modprobe.d as config files
Status in ubuntu-drivers-common package in Ubuntu:
Fix Released
Status in ubuntu-drivers-common source package in Trusty:
Fix Committed
Bug description:
My media center computer have a single nvidia GPU connected to a TV,
and have for many years been happily using the nvidia driver.
Unfortunately the recent upgrade to version 1:0.2.91.7 broke X.
Starting lightdm would fail, delete my xorg.conf and redirect libgl
symlinks to mesa.
After some debugging I fond that this was done by gpu-manager, because
it incorrectly believes that my nvidia module is blacklisted. gpu-
manager.log contained "Is nvidia blacklisted? yes".
More debugging determined that this was happening because I have a several years old file named:
/etc/modprobe.d/blacklist.dpkg-old
which among other things contain the line "blacklist nvidia".
However that is _not_ a modprobe config file. modprobe only uses files
with a .conf extension. (See the man page modprobe.d(5)).
Unfortunately gpu-manager does not have this restriction and looks in
all files in /etc/modprobe.d by running:
grep -G "blacklist.*nvidia[[:space:]]*$" /etc/modprobe.d/*
I could work-around the bug by removing the .dpkg-old file. However this will likely break other machines as well. I found two bugs 1373968 and 1374871 about X not working after installing the latest update. However they does not contain enough information to determine if they are duplicates of this bug or not.
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References