Re: HEADS UP: graphics driver fixes

[David Brownlee <abs%absd.org@localhost>]

Tested again on netbsd-7 with the latest pullups (ticket #590) with
amd64 on a Thinkpad T420s,

i915drmkms0 at pci0 dev 2 function 0: Intel Sandy Bridge Integrated
Graphics Device (rev. 0x09)
drm: Memory usable by graphics device = 2048M
drm: Supports vblank timestamp caching Rev 2 (21.10.2013).
drm: Driver supports precise vblank timestamp query.
i915drmkms0: interrupting at ioapic0 pin 16 (i915)
drm: Wrong MCH_SSKPD value: 0x16040307
drm: This can cause pipe underruns and display issues.
drm: Please upgrade your BIOS to fix this.
drm: GMBUS [i915 gmbus dpb] timed out, falling back to bit banging on pin 5
intelfb0 at i915drmkms0
i915drmkms0: info: registered panic notifier
intelfb0: framebuffer at 0xffff80008df51000, size 1600x900, depth 32,
stride 6400
wsdisplay0 at intelfb0 kbdmux 1: console (default, vt100 emulation),
using wskbd0

Visual artifacts in firefox (similar to what others have reported).
With a (much) earlier version of -7 these went away with 'Option
"AccelMethod" "SNA"', but the only way to eliminate them in this
version was Option "NoAccel"

Otherwise all stable :)

David