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-de...@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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/