Bug 12859

Summary: Special keys unusable after resume on battery - T21
Product: ACPI Reporter: Karol Lewandowski (lmctlx)
Component: Power-Sleep-WakeAssignee: acpi_power-sleep-wake
Status: CLOSED DUPLICATE    
Severity: normal    
Priority: P1    
Hardware: All   
OS: Linux   
Kernel Version: 2.6.29-rc7 Subsystem:
Regression: --- Bisected commit-id:

Description Karol Lewandowski 2009-03-12 01:12:43 UTC 
Latest working kernel version:
unknown or none

Earliest failing kernel version:
Earliest _tested_ by me failing kernel was 2.6.25

Distribution:
Debian 4.0, 5.0

Hardware Environment:
IBM Thinkpad T21

Problem Description:
IBM's special keys (Fn-X[*]) doesn't work after resume iff laptop is resumed on battery, without AC power connected. 

[*] X can be
F4 - suspend to ram,
F7 - change video output (lcd, lcd+crt, crt),
F12 - suspend to disk.

This bug is special case of http://bugzilla.kernel.org/show_bug.cgi?id=11674

In this case special keys do work if suspend and resume is on AC power (without disconnecting AC in between).

Steps to reproduce:
1. Boot laptop on AC power
2. Suspend
3. Disconnect AC power
4. Resume
Comment 1 Karol Lewandowski 2009-03-12 02:31:11 UTC 
I've just found that bug was already reported, it's not fixed yet -- bug confirmed in 2.6.29-rc7.

*** This bug has been marked as a duplicate of bug 10932 ***