On Mon, Feb 11, 2013 at 12:49 PM, James Cobban <[email protected]> wrote: > On 13-02-11 08:32 AM, Alex Deucher wrote: > > On Sat, Feb 9, 2013 at 4:03 PM, James Cobban <[email protected]> > 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 > output. > > Alex > > 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.
radeontool won't do any good for your chip. > 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. In most cases the driver is able to resume fine and bring back the backlight. In your case it doesn't seem to be working. You might try a newer kernel. I fixed some backlight issues in either 3.6 or 3.7 IIRC. > 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. As I said, normally, it should just work. You can try adjusting the backlight manually with sysfs. To check the max brightness: cat /sys/class/backlight/[driver]/max_brightness To set a brightness level: echo [brightness] | sudo tee - /sys/class/backlight/[driver]/brightness replace [brightness] with whatever level you want to set and replace [driver] with the name of the backlight device on your system. You may have more than one so try all of them. E.g., /sys/class/backlight/radeon/, etc. Alex _______________________________________________ xorg-driver-ati mailing list [email protected] http://lists.x.org/mailman/listinfo/xorg-driver-ati
