Bug 56851 - Thinklight procfs not working as expected on Thinkpad x230.
Summary: Thinklight procfs not working as expected on Thinkpad x230.
Status: NEW
Alias: None
Product: Drivers
Classification: Unclassified
Component: Other (show other bugs)
Hardware: All Linux
: P1 normal
Assignee: drivers_other
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2013-04-19 15:13 UTC by guerremdq
Modified: 2016-01-12 18:46 UTC (History)
2 users (show)

See Also:
Kernel Version: 3.2.0-41
Subsystem:
Regression: No
Bisected commit-id:

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Description guerremdq 2013-04-19 15:13:50 UTC 
Thinklight procfs not working as expected on Thinkpad x230.


~ # arch 
i686
~ # uname -r
3.2.0-41-generic-pae
~ # cat /sys/devices/platform/thinkpad_acpi/leds/tpacpi\:\:thinklight/brightness
0
~ # echo 255 > /sys/devices/platform/thinkpad_acpi/leds/tpacpi\:\:thinklight/brightness 
~ # cat /sys/devices/platform/thinkpad_acpi/leds/tpacpi\:\:thinklight/brightness
0
Comment 1 Dererk 2013-06-12 16:51:53 UTC 
Update, problem still exists as for 3.10-rc4.
Comment 2 Kevin Locke 2016-01-12 18:46:20 UTC 
For reference, this is currently being discussed on the ibm-acpi-devel mailing list.[1]  Unfortunately, it looks like this is not easily fixable on the T430, which calls directly into the SMBIOS.[2]  It's unclear whether that is also the case on the X230.

1.  http://sourceforge.net/p/ibm-acpi/mailman/message/34759769/
2.  http://sourceforge.net/p/ibm-acpi/mailman/message/34760107/
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