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@xxxxxxxxxxxxxxxxxxxxx [ 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 ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ ibm-acpi-devel mailing list ibm-acpi-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/ibm-acpi-devel