Red Hat Bugzilla – Bug 441056
modprobe i2c-dev no longer works
Last modified: 2008-10-22 17:48:20 EDT
Description of problem:
This no longer works:
# modprobe i2c-dev
Version-Release number of selected component (if applicable):
I don't know which component. This worked in Fedora 8
that was current Dec 20, 2007, 22.214.171.124-85.fc8.x86_64.
On March 14 we installed lm_sensors 2.10.5-1.fc8.x86_64.
modprobe i2c-dev worked just great. "modprobe i2c-dev"
created a device /dev/i2c-0 which our software uses.
But after "yum update" on Apr 5, 2008, which updated my kernel to
126.96.36.199-64.fc8.x86_64, this no longer works. Now, "modprobe i2c-dev"
returns without error but no /dev/i2c-0 is created.
Steps to Reproduce:
# modprobe i2c-dev
# [ -c /dev/i2c-0 ] || echo "FAIL - not present"
/dev/i2c-0 is not present
/dev/i2c-0 is present
Possibly related to 380971 ? I tried applying the fix cited there but it did
The i2c-tools package is only present in F-9, in F-8 it does not exist so I
think you've choosen the wrong component, this is most likely a kernel bug.
Can you try booting (or installing) an older kernel (2.6.23.x) and then save the
output of dmesg and lsmod to a file, and do the same for the current kernel and
attach all 4 files?
What kind of computer is this happening on?
The information we've requested above is required in order
to review this problem report further and diagnose or fix the
issue if it is still present. Since it has been thirty days or
more since we first requested additional information, we're assuming
the problem is either no longer present in the current Fedora release, or
that there is no longer any interest in tracking the problem.
Setting status to "CLOSED: INSUFFICIENT_DATA". If you still
experience this problem after updating to our latest Fedora
release and can provide the information previously requested,
please feel free to reopen the bug report.
Thank you in advance.