Trying to use Radeon driver on Apple eMac

Mon Dec 8 11:01:26 PST 2008

I'm struggling to get the Radeon driver to work on my eMac G4's Radeon
7500 card (the fbdev driver works fine at 1024x768 with no
acceleration).  On both Fedora 8 and Fedora 10 with default xorg.conf,
the screen is blank (the CRT doesn't glow or anything).  I have a CRT
monitor that supports up to 1280x960.  The eMac also has a video out
port.  I suspect that video may show up on an external monitor, but I
can't test that until my adapter arrives.

With an unmodified configuration, Xorg accepts clients and the
/var/log/Xorg.0.log looks good.  However, the screen is blank.  I
suspect this may be bogus modelines.  I tried a modeline I grabbed
from fbset in the working radeonfb Linux terminal:

$ fbset -x
Mode "1024x768"
    # D: 99.197 MHz, H: 72.090 kHz, V: 89.001 Hz
    DotClock 99.198
    HTimings 1024 1072 1168 1376
    VTimings 768 769 772 810
    Flags    "+HSync" "+VSync"
EndMode

I tried adding this mode through xrandr as follows:

$ xrandr --newmode  "1024x768j" 99.198 1024 1072 1168 1376 768 769 772
810 +HSync +VSync

$ xrandr --addmode DVI-0 1024x768j

$ xrandr

Screen 0: minimum 320 x 200, current 1024 x 768, maximum 2048 x 1024

DVI-1 disconnected (normal left inverted right x axis y axis)

DVI-0 connected 1024x768+0+0 (normal left inverted right x axis y
axis) 0mm x 0mm

   1024x768       59.9*+

   800x600        60.3

   640x480        59.9

   1024x768j      89.0

S-video disconnected (normal left inverted right x axis y axis)

$ xrandr --output DVI-0 --mode 1024x768j

xrandr: Configure crtc 0 failed

Just trying to xrandr to a different resolution fails:

$ xrandr -s 800x600

Failed to change the screen configuration!

And VT-switching to 7 (where Xorg is running) results in Xorg
segfaulting whether I do any of the above or not:

xauth:  creating new authority file /home/joey/.serverauth.19680

X.Org X Server 1.5.3

Release Date: 5 November 2008

X Protocol Version 11, Revision 0

Build Operating System: Linux 2.6.18-92.1.10.el5 ppc

Current Operating System: Linux cello 2.6.27.5-117.fc10.ppc #1 Tue Nov
18 11:50:30 EST 2008 ppc

Build Date: 16 November 2008  08:30:07PM

Build ID: xorg-x11-server 1.5.3-5.fc10

	Before reporting problems, check http://wiki.x.org

	to make sure that you have the latest version.

Markers: (--) probed, (**) from config file, (==) default setting,

	(++) from command line, (!!) notice, (II) informational,

	(WW) warning, (EE) error, (NI) not implemented, (??) unknown.

(==) Log file: "/var/log/Xorg.0.log", Time: Mon Dec  8 13:33:24 2008

(==) Using config file: "/etc/X11/xorg.conf"

** snip **

Leaving Restore TV

** Message: another SSH agent is running at: /tmp/ssh-igRxa19911/agent.19911

Window manager warning: Failed to read saved session file
/home/joey/.config/metacity/sessions/1042b409dc9a775ef7122876120873685600000199110021.ms:
Failed to open file
'/home/joey/.config/metacity/sessions/1042b409dc9a775ef7122876120873685600000199110021.ms':
No such file or directory

Backtrace:

0: /usr/bin/X(xorg_backtrace+0x50) [0x100ffb90]

1: /usr/bin/X(xf86SigHandler+0x68) [0x10082ec8]

2: [0x100364]

3: [0x48002000]

4: /usr/lib/xorg/modules/drivers//radeon_drv.so(radeon_update_dri_buffers+0x8c)
[0xe815ffc]

5: /usr/lib/xorg/modules/drivers//radeon_drv.so(RADEONEnterVT+0xb4) [0xe7e4d94]

6: /usr/lib/xorg/modules//libxaa.so [0xe6e2dc8]

7: /usr/bin/X [0x1009cf70]

8: /usr/bin/X [0x1008cf68]

9: /usr/bin/X(xf86Wakeup+0x4dc) [0x10083e2c]

10: /usr/bin/X(WakeupHandler+0x84) [0x10045d44]

11: /usr/bin/X(WaitForSomething+0x210) [0x100fc570]

12: /usr/bin/X(Dispatch+0xf8) [0x100412e8]

13: /usr/bin/X(main+0x43c) [0x1002261c]

14: /lib/libc.so.6 [0xfe0ebc4]

15: /lib/libc.so.6 [0xfe0ed80]

Fatal server error:

Caught signal 11.  Server aborting

** snip **

waiting for X server to shut down

I tried adding my magic modeline via xorg.conf, but Xorg doesn't seem
to be taking it.  Here is my xorg.conf:

# Xorg configuration created by system-config-display

Section "ServerLayout"

	Identifier     "single head configuration"

	Screen      0  "Screen0" 0 0

	InputDevice    "Keyboard0" "CoreKeyboard"

EndSection

Section "InputDevice"

	Identifier  "Keyboard0"

	Driver      "kbd"

	Option	    "XkbModel" "pc105"

	Option	    "XkbLayout" "us"

	Option	    "XkbVariant" "dvorak"

EndSection

Section "Device"

	Identifier  "Videocard0"

	Driver      "radeon"

	#Option      "Accel" "off"

	Option      "AccelMethod" "XAA"

	Option      "AccelDFS"    "0"

	Option      "AGPMode"     "4"

	Option      "AGPFastWrite" "0"

	Option      "GARTSize" "64"

	Option      "EnablePageFlip" "1"

	Option      "ColorTiling" "1"

	#Option      "TVDACLoadDetect" "TRUE"

	#Option      "TVStandard" "ntsc"

	#Option      "monitor-S-video" "TV-monitor"

	#Option      "DPMS" "0"

	#Option	    "UseFBDev" "true"

EndSection

Section "Monitor"

	Identifier "eMac Monitor"

	Option "DDC" "False"

	HorizSync 71-73

	VertRefresh 78-80

	#Modeline "1024x768_89.00"  99.07  1024 1088 1200 1376  768 769 772
809  -HSync +Vsync

	Modeline "1024x768" 99.198 1024 1072 1168 1376 768 769 772 810 +HSync +VSync

           #This is the magic modeline I got from fbset -x

EndSection

Section "Screen"

	Identifier "Screen0"

	Device     "Videocard0"

	Monitor "eMac Monitor"

	DefaultDepth     16

	SubSection "Display"

		Viewport   0 0

		Depth     16

		Modes "1024x768"

	EndSubSection

EndSection

This time, xrandr says:

Screen 0: minimum 320 x 200, current 1024 x 768, maximum 2048 x 1024

DVI-1 disconnected (normal left inverted right x axis y axis)

DVI-0 connected 1024x768+0+0 (normal left inverted right x axis y
axis) 0mm x 0mm

   1024x768       59.9*+

   800x600        60.3

   640x480        59.9

S-video disconnected (normal left inverted right x axis y axis)

(note that my modeline is missing)

My Xorg.0.log for this attempt is at
http://www.funsitelots.com/pub/Xorg.0.log_emacG4

How can I get Xorg to accept my modeline so I can see if this one will work?