backlight control not working

[Neal Becker]

Rex Dieter wrote:

> On 02/18/2013 02:26 PM, Neal Becker wrote:
>> Neal Becker wrote:
>>
>>> Neal Becker wrote:
>>>
>>>> Also, I created a new test user.  He also cannot control screen brightness,
>>>> confirming it's not due to any old settings in my own account.
>>>>
>>>
>>> It looks like a lot of people have seen similar issues, here is an example:
>>>
>>> https://bbs.archlinux.org/viewtopic.php?pid=1229185
>>>
>>>
>>
>> Hey guess what?  If I set kdm as displaymanager, problem is fixed!
> 
> wierd.  so, what were you using previously?
> 
> -- rex
> 
Before I reinstalled, I had been using kdm, and I believe it worked fine.  After 
reinstalling, I had the default gdm, and it didn't work.  Then I switch to kdm, 
and now it's working again.  I didn't try to repeat to confirm it, but I'm 
pretty sure that's it.