Hello,
I'm seeing this when I dock a Thinkpad X220 laptop:
[ 3129.616279] thinkpad_acpi: unknown possible thermal alarm or
keyboard event received
[ 3129.616297] thinkpad_acpi: unhandled HKEY event 0x6040
[ 3129.616298] thinkpad_acpi: please report the conditions when this
event happened to ibm-acpi-devel@lists.sourceforge.net
[ 3129.616949] thinkpad_acpi: undocked from hotplug port replicator
[ 3129.617065] ACPI: \_SB_.GDCK - undocking
[ 3144.184916] ACPI: \_SB_.GDCK - docking
[ 3144.185204] ACPI: Unable to dock!
and the monitor doesn't come up.
I'm currently running a stock Fedora kernel:
[penberg@tux ~]$ uname -a
Linux tux 3.3.8-1.fc16.x86_64 #1 SMP Mon Jun 4 20:49:02 UTC 2012
x86_64 x86_64 x86_64 GNU/Linux
but looking at drivers/platform/x86/thinkpad_acpi.c in Linus' tree, the event
is not handled there either:
TP_HKEY_EV_UNK_6040 = 0x6040, /* Related to AC change?
some sort of APM hint,
W520 */
Help!
Pekka
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