Hallo,
I have armbian 3.4.109 (Jessie) on a cubietruck. It is connected to a Motorola Lapdock. I have the problem, I could not change the resolution (xfce 4) from 1920x1080.
Tried following steps:
xrandr
output: Screen 0: minimum 1920 x 1080, current 1920 x 1080, maximum 1920 x 1080 default connected 1920x1080+0+0 0mm x 0mm 1920x1080 60.00*
error Message: Failed to get size of gamma for output default
cvt 1280 800
output: # 1280x800 59.81 Hz (CVT 1.02MA) hsync: 49.70 kHz; pclk: 83.50 MHz Modeline "1280x800_60.00" 83.50 1280 1352 1480 1680 800 803 809 831 -hsync +vsync
When I try to add new entry with xrandr, I always get error messages. Once the gamma value is missing. When I add a gamma value, it sais, the Display "Screen 0" is not known:
root@cubietruck:~# xrandr --output "Screen 0" --gamma 1.0:1.0:1.0 xrandr: Failed to get size of gamma for output default warning: output Screen 0 not found; ignoring xrandr: Need crtc to set gamma on. OUTPUT from logfile:
root@cubietruck:/var/log# cat Xorg.0.log | grep gamma [ 513.429] (==) FBDEV(0): Using gamma correction (1.0, 1.0, 1.0)
root@cubietruck:/var/log# cat Xorg.0.log | grep screen [ 513.401] Kernel command line: console=tty1 root=/dev/mmcblk0p1 rootwait rootfstype=ext4 sunxi_ve_mem_reserve=0 sunxi_g2d_mem_reserve=0 sunxi_no_mali_mem_reserve sunxi_fb_mem_reserve=16 hdmi.audio=EDID:0 disp.screen0_output_mode=1920x1080p60 panic=10 consoleblank=0 enforcing=0 loglevel=1 [ 513.404] (==) No screen section available. Using defaults. [ 513.405] (==) No monitor specified for screen "Default Screen Section". [ 513.496] (II) GLX: Initialized DRISWRAST GL provider for screen 0 In the logfile the screen is specificate as "Screen 0" and the gamma set to 1.0 1.0 1.0? I tried several options with xrandr (add a new entry or change one - but it never works...
Is someone there with an advise? I have read different threads in other forums, but nothing helped. Or should I remove all desktop manager and install them again?
Regards
vexation