On Thu, Oct 13, 2011 at 10:37 AM, Frederik Vogelsang <[email protected]> wrote: > 2011/10/13 Alex Deucher <[email protected]>: >> The brightness is set on the TV itself. The only thing the driver can >> really adjust is the gamma correction which is exposed via xrandr or >> xgamma if you want to adjust it. > I can turn up the brightness on the TV, but that only causes the TV's > backlight to increase. The actual dark areas stay pretty much black. I > did also already mess with xgamma but this does not improve the > situation either. > >> You might try connecting directly to >> the TV as Andy suggested, or try booting with radeon.audio=0 depending >> on how old your kernel is. > I've tried both. Neither a direct TV HDMI connection (without the AV > receiver) nor radeon.audio=0 fixed the issue. > > Another strange thing: the picture quality (also with dark areas) on > Windows with the AMD Catalyst driver is also fine. I did not have to > make any brightness changes for that system, it worked out of the box > without any settings. So it has to be specific to the Linux side. > > Any more ideas? Can anyone tell how the default brightness level is > set for digital outputs? Is it calculated or hard coded? What about an > xorg.conf setting?
Other than the gamma stuff, there is no "brightness" setting in the display hardware. Alex _______________________________________________ xorg-driver-ati mailing list [email protected] http://lists.x.org/mailman/listinfo/xorg-driver-ati
