Hitchhiker's Guide to Openbsd

11.2.3 - armish
No X servers, only X clients. 
11.2.4 - hp300
/usr/X11R6/README
 for hp300. 
11.2.5 - hppa
No X server, only X clients. 
11.2.6 - i386
/usr/X11R6/README
 for i386. 
Set 
machdep.allowaperture=2
in 
/etc/sysctl.conf
. 
http://www.openbsd.org/faq/faq11.html (3 of 14)9/4/2011 10:02:17 AM

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11 - The X Window System
For the vast majority of users, X on i386 auto-configures successfully, so no further configuration is 
needed. IF further configuration is needed, use the 
X -configure
 process 
below
. 
11.2.7 - landisk
No X servers, only X clients. 
11.2.8 - loongson
No configuration needed. 
11.2.9 - luna88k
No X servers, only X clients. 
11.2.10 - macppc
/usr/X11R6/README
 for macppc. 
Set 
machdep.allowaperture=2
in 
/etc/sysctl.conf
. 
Supported Macintosh PPC systems can be run in one of two different ways: "accelerated" and 
"framebuffer" (unaccelerated). 
In the "framebuffer" mode, the system will be running with 8 bits per pixel, and the video resolution is 
controlled by the Macintosh environment, so you will probably want to keep a small MacOS section on 
your disk to adjust these settings. This mode has the advantage of "Just Working", however it can be 
frustratingly inflexible (for example, altering resolution may require booting MacOS). 
If your Macintosh has an ATI-based video system, it can run using an accelerated X server, which gives 
better performance and more control in the OpenBSD environment. The NVIDIA video cards in some 
macppc systems will also work in many cases. The README file has details on configuring the 
accelerated driver, start by using the sample file there. 
While the README file details using the standard Apple one-button mouse with X, unless you are 
using a laptop, it is highly recommended that you just buy a modern third-party USB mouse with three 
or more buttons. 
CRT iMacs and X
http://www.openbsd.org/faq/faq11.html (4 of 14)9/4/2011 10:02:17 AM

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11 - The X Window System
iMacs have a very unusual (in this day) CRT, in that it has a fixed horizontal scan frequency. Attempting 
to use a horizontal sweep speed outside a very narrow range will cause the monitor to not light up. The 
following lines, added to xorg.conf in the 
Section "Monitor"
area seem to make a lot of CRT-
based iMacs in the 333MHz to 500MHz range (and possibly more!) work well: 
HorizSync 60.0 - 60.0
VertRefresh 43.0 - 117.0 
You may wish to restrict the lower limit of 
VertRefresh
to values that you are more likely to find 
acceptable, for example 70.