K.Kong
May 10th, 2014, 02:59 AM
I have installed Ubuntu 14 in virtual machines, one in Windows 8 Hyper-V and another in VirtualBox on another PC.
I let the installation run using all the defaults. The one in Hyper-V comes with only one display resolution: 1152x864. The one in VirtualBox comes with one display resolution: 640x480. Both are unsuitable for my work. I need 800x600 and occasionally 1024x768.
I tried cvt 800 700 and got the Modeline:
"800x600_60.00" 38.2 800 832 912 1024 600 603 607 624 -hsync +vsync
(xrandr on both installations always give "Failed to get size of gamma for output default". I ignored this message.)
After doing xrandr --newmode ... followed by --addmode , I get to see 800x600 in Display Settings. However, when I tried to apply, on the Hyper-V one I get: The selected configuration for displays could not be applied. required virtual size does not fit available size: requested=(800x600), minimum=(1152,864), maximum=(1152,864). (I get a similar message in the other VM but this time the limit is 640x480.) I ran xrandr -q and it gives:
xrandr: Failed to get size of gamma for output default
Screen 0: minimum 800 x 600, current 1152 x 864, maximum 1152 x 864
default connected primary 1152x864+0+0 0mm x 0mm
1152x864 0.0
800x600_60.00 59.9
What have I done wrong? What is the problem with failed to get size of gamma?
How can I change my display resolution?
Thanks.
I let the installation run using all the defaults. The one in Hyper-V comes with only one display resolution: 1152x864. The one in VirtualBox comes with one display resolution: 640x480. Both are unsuitable for my work. I need 800x600 and occasionally 1024x768.
I tried cvt 800 700 and got the Modeline:
"800x600_60.00" 38.2 800 832 912 1024 600 603 607 624 -hsync +vsync
(xrandr on both installations always give "Failed to get size of gamma for output default". I ignored this message.)
After doing xrandr --newmode ... followed by --addmode , I get to see 800x600 in Display Settings. However, when I tried to apply, on the Hyper-V one I get: The selected configuration for displays could not be applied. required virtual size does not fit available size: requested=(800x600), minimum=(1152,864), maximum=(1152,864). (I get a similar message in the other VM but this time the limit is 640x480.) I ran xrandr -q and it gives:
xrandr: Failed to get size of gamma for output default
Screen 0: minimum 800 x 600, current 1152 x 864, maximum 1152 x 864
default connected primary 1152x864+0+0 0mm x 0mm
1152x864 0.0
800x600_60.00 59.9
What have I done wrong? What is the problem with failed to get size of gamma?
How can I change my display resolution?
Thanks.