Comment 16 for bug 290156

Revision history for this message
Bryce Harrington (bryce) wrote :

Since this seems to be an EDID modeline mismatch, my guess is that this is a very monitor model-specific issue (i.e., other Hitachi monitors won't have this problem, just the specific model you have). It may even be particular to the specific monitor and graphics card combo (i.e., maybe swapping out either a different monitor or a different video card, and it works). So at this point I'm not sure it's important enough to put in the release notes, esp. since the workaround takes a bit to explain.

I could be wrong though - if there is a pattern of "Display out of range" regressions reported, then it could be something different in xserver's mode selection logic. Upstream should be able to clue us in on this, or if we can find a spate of bug reports similar to this one but with different monitors. If evidence proves to be the case, then yeah we definitely should include mention of it.

Regardless, I definitely agree this is well worth having a documented workaround/troubleshooting guide, even if it's not referenced in the release notes. I've written up a shot of it here:
https://wiki.ubuntu.com/X/Troubleshooting/Resolution . Please review and copyedit.