You are running 5.4. 5.5 will be released on or about May 1. Note, from
www.openbsd.org/55.html:
Quote:
inteldrm(4) has been updated to Linux 3.8.13.19 notably bringing Haswell stability fixes
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This may help.
If you skip 5.5 and jump to -current (beyond 5.5 and in active development for 5.6), you get additional drm and inteldrm fixes... and you don't have to wait 9 more days.