K 10
svn:author
V 6
royger
K 8
svn:date
V 27
2015-04-29T12:53:41.414697Z
K 7
svn:log
V 393
vt_vga: add a timeout while waiting for vertical retrace

On one of my systems FreeBSD will fail to boot because vt_vga gets stuck
waiting for the vertical retrace if there's no monitor attached. Fix this by
adding a timeout and exiting if the vertical retrace times out.

Sponsored by: Citrix Systems R&D
Reviewed by: emaste, dumbbell
Differential Revision: https://reviews.freebsd.org/D2397

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