[ltp] tpacpi bug in tpacpi::thinklight/brightness for X1 Carbon

[Evgeni Golov]

On 01/01/2014 03:22 PM, Chris Schumann wrote:
> 
>> If it still does in your kernel, echo "0x0e" > /proc/acpi/ibm/cmos
>> might be useful.  Other interesting cmos commands might be 0x0b to 0x0d.
> Not so useful:
> $ sudo echo "0x0e" > /proc/acpi/ibm/cmos
> bash: /proc/acpi/ibm/cmos: Permission denied

use either 'echo "0x0e" | sudo tee /proc/acpi/ibm/cmos'
or become root via 'sudo su -' and do the echo .. > .. then.