Hi,
unfortunatly the issue has not been fixed in the latest upstream kernel.
The kernel version I used to test was:
$ uname -r
3.15.0-031500rc8-generic
For the test I ran acpi_listen and toggled the switch numerous times.
Out of curiosity I also checked some older kernel images:
3.11.10-03111010-generic, which is the last 3.11 iteration, is working fine:
$ acpi_listen -t 10
ibm/hotkey HKEY 00000080 00007000
and its broken with 3.12.0-031200rc1-generic, which is the first 3.12
release candiate.
I hope this helps to track it down.
** Tags added: kernel-bug-exists-upstream kernel-bug-exists-
upstream-3.12-rc1 kernel-bug-exists-upstream-3.15-rc8
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/1310248
Title:
[Lenovo Thinkpad X220] wireless switch doesn't generate an acpi event
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