"kHz" should be replaced with "Hz" in the following string from cvt manpage: "refresh Provide a vertical refresh rate in kHz. The CVT standard prefers either 50.0, 60.0, 75.0 or 85.0kHz. The default is 60.0kHz."
Thanks for the report - patch submitted for review: http://patchwork.freedesktop.org/patch/9769/
Seems it has got an accidental duplicate: http://patchwork.freedesktop.org/patch/9825/
patchwork didn't associate that the first was sent for review, and after getting that review, the second was submitted to the release manager to be applied to the git master repo.
Fix is in git master now: http://cgit.freedesktop.org/xorg/xserver/commit/?id=c3180a74a4fc6304bcfe676e3285d707874a9fea and has been cherry-picked into the 1.12 branch for the 1.12.3 release as well: http://cgit.freedesktop.org/xorg/xserver/commit/?h=server-1.12-branch&id=3484ef2de50970fefe0c2580f52357ee37d3e6f3
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