On 31.10.2015 21:13, Pavel Machek wrote: > Hi! > > 4.3-rc7 kernel, graphics works reasonably well in 1600x1200 mode. But > my monitor is native 1920x1080, so that mode looks pretty ugly on > screen. If I go to 1920x1080, I see colored horizontal lines (often > black) as soon as there's graphics activity. > > pavel at half:~$ xrandr > Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 8192 x 8192 > VGA-0 connected 1920x1080+0+0 (normal left inverted right x axis y > axis) 478mm x 268mm > 1920x1080 60.00*+ > 1600x1200 60.00 > 1680x1050 59.95 > 1280x1024 75.02 60.02 > 1440x900 59.89 > 1024x768 75.08 60.00 > 800x600 75.00 60.32 > 640x480 75.00 60.00 > 720x400 70.08 > pavel at half:~$ xrandr --output VGA-0 --mode 1600x1200 > pavel at half:~$ xrandr --output VGA-0 --mode 1920x1080 > pavel at half:~$ xrandr --output VGA-0 --mode 1600x1200 > > > This is Acer notebook, > > 01:00.0 VGA compatible controller: Advanced Micro Devices, > Inc. [AMD/ATI] RV710/M92 [Mobility Radeon HD 4530/4570/545v] > > Ouch, and power consumption seems to be 8W too high. (25W instead of > 17W), I believe it started when I added radeon firmware, but will > check. It does not go lower even when I switch to text console. > > Any ideas?
Alex probably knows more about this, but it sounds like problems with switching the memory clocks on 3D load. Try to disable power management completely with radeon.dpm=0 on the kernel command line or nailing the hardware at a specific power level using sysfs. Power consumption would be totally awkward, but it should help nailing down the problem. Regards, Christian. > > Pavel
