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[Brad Figg <brad.figg@xxxxxxxxxxxxx>]

This bug is missing log files that will aid in diagnosing the problem.
>From a terminal window please run:

apport-collect 1417032

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1417032

Title:
  Userspace can't access i2c devices (missing i2c entries in /dev)

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  My board has an i2c bus (and devices attached to it), but the
  corresponding /dev entries are missing and userspace can't access
  these devices until the i2c-dev module is loaded:

  [flag@luxor ~]$ ls -la /sys/bus/i2c/devices/
  total 0
  drwxr-xr-x 2 root root 0 Feb  2 08:38 .
  drwxr-xr-x 4 root root 0 Feb  2 08:38 ..
  lrwxrwxrwx 1 root root 0 Feb  2 09:28 i2c-0 -> ../../../devices/pci0000:00/0000:00:01.0/0000:01:00.0/i2c-0
  lrwxrwxrwx 1 root root 0 Feb  2 09:28 i2c-1 -> ../../../devices/pci0000:00/0000:00:01.0/0000:01:00.0/i2c-1
  lrwxrwxrwx 1 root root 0 Feb  2 09:28 i2c-2 -> ../../../devices/pci0000:00/0000:00:01.0/0000:01:00.0/i2c-2
  lrwxrwxrwx 1 root root 0 Feb  2 09:28 i2c-3 -> ../../../devices/pci0000:00/0000:00:01.0/0000:01:00.0/i2c-3
  lrwxrwxrwx 1 root root 0 Feb  2 09:28 i2c-4 -> ../../../devices/pci0000:00/0000:00:01.0/0000:01:00.0/i2c-4
  lrwxrwxrwx 1 root root 0 Feb  2 09:28 i2c-5 -> ../../../devices/pci0000:00/0000:00:01.0/0000:01:00.0/i2c-5
  lrwxrwxrwx 1 root root 0 Feb  2 09:28 i2c-6 -> ../../../devices/pci0000:00/0000:00:01.0/0000:01:00.0/i2c-6
  lrwxrwxrwx 1 root root 0 Feb  2 09:28 i2c-7 -> ../../../devices/pci0000:00/0000:00:01.0/0000:01:00.0/i2c-7
  [flag@luxor ~]$ i2cdetect -l
  [flag@luxor ~]$ ls -la /dev/i2c*
  ls: cannot access /dev/i2c*: No such file or directory
  [flag@luxor ~]$

  
  [flag@luxor ~]$ sudo modprobe i2c-dev                                                                                                       
  [flag@luxor ~]$ ls -la /dev/i2c*
  crw-rw---- 1 root i2c 89, 0 Feb  2 09:33 /dev/i2c-0
  crw-rw---- 1 root i2c 89, 1 Feb  2 09:33 /dev/i2c-1
  crw-rw---- 1 root i2c 89, 2 Feb  2 09:33 /dev/i2c-2
  crw-rw---- 1 root i2c 89, 3 Feb  2 09:33 /dev/i2c-3
  crw-rw---- 1 root i2c 89, 4 Feb  2 09:33 /dev/i2c-4
  crw-rw---- 1 root i2c 89, 5 Feb  2 09:33 /dev/i2c-5
  crw-rw---- 1 root i2c 89, 6 Feb  2 09:33 /dev/i2c-6
  crw-rw---- 1 root i2c 89, 7 Feb  2 09:33 /dev/i2c-7
  [flag@luxor ~]$ i2cdetect -l
  i2c-0   unknown         Radeon i2c bit bus 0x90                 N/A
  i2c-1   unknown         Radeon i2c bit bus 0x91                 N/A
  i2c-2   unknown         Radeon i2c bit bus 0x92                 N/A
  i2c-3   unknown         Radeon i2c bit bus 0x93                 N/A
  i2c-4   unknown         Radeon i2c bit bus 0x94                 N/A
  i2c-5   unknown         Radeon i2c bit bus 0x95                 N/A
  i2c-6   unknown         Radeon i2c bit bus 0x96                 N/A
  i2c-7   unknown         Radeon i2c bit bus 0x97                 N/A
  [flag@luxor ~]$

  Since the module is not automatically loaded, and there's no clue to
  load it if i2c devices fail to work (and people might think it's a
  bug), i propose to build it statically (it adds ~8k to the
  uncompressed kernel image).

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