Re: kern/49285 drmkms on pineview (intel)

[Patrick Welche <prlw1%cam.ac.uk@localhost>]

The following reply was made to PR kern/49285; it has been noted by GNATS.

From: Patrick Welche <prlw1%cam.ac.uk@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: 
Subject: Re: kern/49285 drmkms on pineview (intel)
Date: Fri, 9 Jan 2015 13:36:18 +0000

 RCS file: /cvsroot/src/sys/external/bsd/drm2/dist/drm/i915/intel_opregion.c,v
 ----------------------------
 revision 1.8
 date: 2014-11-25 03:31:12 +0000;  author: nonaka;  state: Exp;  lines: +3 -1;  commitid: 8xGBfzWM13gq2wZx;
 avoid NULL pointer dereference when acpivga isn't attached.
 ----------------------------
 
 fixed the panic.
 (This is an odd setup as GFX0 doesn't define the functions necessary for
 acpivga to attach.)
 
 The status now is that success in correct resolution detection seems to
 be dependent on the type of monitor, but playing spot the difference hasn't
 been very successful ("working" and "broken" monitors both have 1920x1080,
 and use the same connectors / setup) - the "working" one also happens to
 be a touch screen (iiyama Prolite T2250MTS) and is more recent than the
 "broken" one (what sort of "new" "monitor" protocols are there?)
 
 Given a "working" monitor, with SNA, X runs with the correct
 resolution, but most fonts (including xdm login screen) are corrupt.
 
         Option       "RENDER" "Disable"
 
 avoids the font corruption, so the box is now usable, though there are
 still artefacts, which look rather like http://gnats.netbsd.org/49547.
 (This is yesterday's -current/amd64)