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When upgrading an Ubuntu 12.04 installation to the trusty hwe package I
noticed that the parallel port printer was not working anymore. The
reason is the parallel port which cannot be written to anymore. The
printer cannot be detected and even an echo "hello" > /dev/lp0 with an
occupied device message. The kernel log contains many errors "DMA write
timed out" - they do only appear in the kernel versions with which the
parallel port is not working. It is certainly related to the parport
problem.
Reverting to the raring kernel 3.8 makes the parallel port work again.
The saucy 3.11 kernel is affected by the problem to. The original
precise kernel was not working either.
The ThinkCentre Edge 72 is an Intel IvyBridge based system.
** Affects: linux (Ubuntu)
Importance: Low
Status: Incomplete
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Parallel port not working since kernel 3.11 on ThinkCentre Edge 72
https://bugs.launchpad.net/bugs/1363492
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