https://bugzilla.kernel.org/show_bug.cgi?id=29642
URL: http://www.spassets.com/forums/linux.acpi.ibm-acpi.dev
el/295015/Parallel%20port%20not%20detected%20if%20lapt
op%20(X60s)%20is%20notdocked%20at%20boot%20time
Summary: Parallel port not working when booting undocked and
docking while running
Product: ACPI
Version: 2.5
Kernel Version: 2.6.37-rc7-amd64
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Config-Hotplug
AssignedTo: acpi_config-hotp...@kernel-bugs.osdl.org
ReportedBy: simon+nos...@iodev.org
Regression: No
When booting my Thinkpad X61s undocked and (hot-)plugging it into the docking
station ("Thinkpad X6 UltraBase") while running, the parallel port does not
work.
Steps to Reproduce:
1) boot notebook without being docked
2) plug into docking station while running
Actual Results: /dev/lp0 does not exist
Expected Results: /dev/lp0 is created and can be used
Removing the parport and lp module and loading it again does not have any
effect and `dmesg` says "[ 6977.586439] lp: driver loaded but no devices found"
(no /dev/lpX device is created).
If the notebook was booted while being docked, everything works as expected and
the device exists.
This problem also occurs using the stock 2.6.32 kernel from Debian squeeze.
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