cannot compute backend DFP timings
I try to use my ViewSonic VP201b in 1600x1200 resolution.
First I get only 1280x1024 resolution, then I found this forum and try to add modeline option to monitor section.
Now I have only 800x600 resolution and when I read Xorg.log and I found error message like title, it seems to come to when validating modeline, nvidia-bug-report-06111900-01.log line 2056.
Is there any way to get this working.