maintainer-feedback requested: [Bug 198459] x11-servers/xorg-server: Fails to detect most video cards on sparc64 in 11.0-CURRENT

[bugzilla-noreply at freebsd.org]

gmbroome at vcu.edu has reassigned Bugzilla Automation <bugzilla at FreeBSD.org>'s
request for maintainer-feedback to x11 at FreeBSD.org:
Bug 198459: x11-servers/xorg-server: Fails to detect most video cards on
sparc64 in 11.0-CURRENT
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=198459



--- Description ---
xorg-server 1.14 on sparc64 in 11.0-CURRENT (r279210) fails to utilize some
graphics drivers.

Steps to reproduce: install 11.0-CURRENT on sparc64 with either an ATI Radeon
or Mach64 card and install the xorg-server and approprate drivers.  Run `Xorg
-configure` and attempt to launch an X server with the generated configuration.

Actual results: X server fails to launch; Xorg.0.log excerpts shown below.

Expected results: an X server launches and displays on the primary monitor.

Hardware: Sun Blade 1000

Software: Stock 11.0-CURRENT, GENERIC kernel, listed revision, ports built with
default options on 2014-March-04 with up-to-date tree.

x11-drivers/xf86-video-ati-ums and x11-drivers/xf86-video-mach64 both give
errors during `Xorg -configure` (mach64 example here, ati is identical except
for the driver name):

(EE) Unable to map mmio aperture.  Permission denied (13)
(WW) MACH64: Mach64 in slot 0:2:0 could not be detected!

When attempting to launch X.org with the generated xorg.conf, the server fails
to launch with message:

(EE) no screens found(EE)

Notes:
 - Card tested with ATI UMS driver = Sun XVR-100
 - Card tested with Mach64 driver = Sun PGX64

Troubleshooting steps taken:
 - Tried with both syscons and vt; the results are the same in each case
 - Tried rolling back to xorg-server 1.12.4 (including rebuild of drivers);
results are the same
 - Tried rolling back to xorg-server 1.7.7 (including reduild of drivers); the
server finds devices properly, but still fails to set up MMIO with the
"permission denied" error

Possibly related:
 - xf86-video-scfb allows the X server to start when using VT (not syscons),
but gives only a black screen.	The server restarts after a short time with a
memory error.  Exact message can be provided if needed.