I am working in a VirtualBox 4 VM running Slackware-current. I have added an external monitor, and am attempting to set up both of them to run in their native resolutions, but am having no luck.
I am following the instructions set out at: http://ubuntuforums.org/archive/index.php/t-1689514.html
But I cannot get past the step where I add a new monitor mode, ie:
xrandr --addmode VBOX1 1600x1200_60.00 as I get an error message:
X Error of failed request: BadMatch (invalid parameter attributes) Major opcode of failed request: 151 (RANDR) Minor opcode of failed request: 18 (RRAddOutputMode) Serial number of failed request: 20 Current serial number in output stream: 21
I have gone through a number of forums, installed the latest version of VirtualBox4, and installed the Guest OS Runtime utilities.
I have also made sure that my virtual display can handle this, ie:
xrandr | grep -i maximum
minimum 64 x 64, current 800 x 600, maximum 32000 x 32000
Has anyone else encountered something similar?