How do I manually turn on the light
webmaster at Jamescobban.net
Mon Feb 11 09:49:51 PST 2013
On 13-02-11 08:32 AM, Alex Deucher wrote:
> On Sat, Feb 9, 2013 at 4:03 PM, James Cobban <webmaster at jamescobban.net> wrote:
>> I am running Ubuntu 12.10 on a Dell laptop with VGA compatible controller:
>> Advanced Micro Devices [AMD] nee ATI BeaverCreek [Mobility Radeon HD 6620G].
>> The Xorg driver works well except that when I close and reopen the laptop
>> and the system resumes the light is not turned on to illuminate the LCS
>> display. Can I manually turn the light on? If so how? I don't see any
>> activity on related bugs since 2010.
>> I have had to switch back to the proprietary fglrx driver despite its
>> problems because being able to close and reopen my laptop is higher priority
>> than the improved display characteristics of the Xorg driver.
> What kernel are you using? Does manually adjusting the backlight
> controls after resume fix the issue? Are you using the acpi backlight
> interface or the radeon specific backlight interface? Open a bug
> (https://bugs.freedesktop.org) and attach your xorg log and dmesg
Ubuntu 12.10 with kernel 3.5.0-23-generic. I am just running with
whatever configuration the Ubuntu "Additional Drivers" graphical tool
activates. I do not know what that is. I have no idea how to manually
adjust the backlight controls, but the light is completely off, so I
think that would be pointless. I tried using "radeontool light on" to
turn the light on, because I could see that command being issued by the
lid.sh script, but that did nothing. I am not familiar with the
capabilities of the acpi interface. I just want to turn the light on!
I would not be asking if I knew what to do. I do not believe there is an
intrinsic problem that needs a bug fix. The actual resume seems to be
working fine. For example I can telnet into the resumed system. I
think this is just a configuration error in Ubuntu for this particular
hardware. For example I get exactly the same behavior if I switch to
the fglrx driver, using the "Additional Drivers" script, and then forget
to run the "aticonfig --initial" script. So I am confident that all I
have to do is find the right command to turn the light on.
I do not know what I am doing, so just tell me what to try.
Jim Cobban webmaster at jamescobban.net
<mailto:webmaster at jamescobban.net?subject=Email%20Message>
Web-site: www.jamescobban.net <http://www.jamescobban.net/>
34 Palomino Dr.
Kanata, ON, CANADA
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