xrandr: Configure crtc 2 failed

[atul]

Dear Michael,
Many thanks for the advice - will try uninstalling the ubuntu drivers now to see if it works with a plain, stock kernel.

FYI - 2 wierdness
1- I dual booted into windows (by mistake) yesterday and the USB monitor adapter was detected during boot! behaved perfectly under windows
2- from what I recall when I first installed xubuntu the USB adapter wasn't recognised till I installed the DL drivers - so I think I might be back after trying the above.
BW
Atul

[atul]

Hello Michael,

So I unstalled the DL driver - EVDI gone. But still the same error with the xubuntu display manager, with arandr and xrandr. tried xrandr --setprovideroutputsource ... but no joy.

I've put some samples of checks below in case they help you - I'd be very grateful if you can give any further advice or suggestions please.

BW
Atul

> xrandr --output DVI-I-1-3 --mode 1920x1080

xrandr: Configure crtc 2 failed

> lsmod | egrep -i 'video|evdi|radeon|udl'

uvcvideo               77824  0
videobuf2_vmalloc      16384  1 uvcvideo
videobuf2_memops       16384  1 videobuf2_vmalloc
videobuf2_v4l2         28672  1 uvcvideo
videobuf2_core         36864  2 uvcvideo,videobuf2_v4l2
v4l2_common            16384  1 videobuf2_v4l2
videodev              155648  4 uvcvideo,v4l2_common,videobuf2_core,videobuf2_v4l2
media                  24576  2 uvcvideo,videodev
udl                    28672  1
radeon               1466368  7
i2c_algo_bit           16384  1 radeon
ttm                    90112  1 radeon
drm_kms_helper        139264  2 udl,radeon
drm                   311296  8 udl,ttm,drm_kms_helper,radeon