Re: xinerama on Miata w/ 2 Elsa Gloria Synergy 8's on Debian testing?
I've had partial luck with dual head alphas running on XP1000s and
dpw433/500/600 under Xfree.
(Jay Estabrook provided many useful patches and comments to get me to
this point. Hope he is well.)
Dual head didn't work fully till the 4.2 Xfree release because of problems
initializing the second display adapter. Anyway...
Xfree 3.6 - no second head support
Xfree 4.0.1 - sort of works in 8 bit pseudocolor mode with "DacSpeed
220" and "VideoRam 8192" added to the device sections and
using a tweaked Modeline. The "sort of works" part is
because there is a vertical column of snow about 10 pixels
wide about 256 pixels from the left screen edge. Looking at
the driver source code, the dac speed is intentionally
derated on the second head, but I think this must have been a
bug. Forcing it to 220 seems to be OK.
The tweaked mode line (shown bellow) seems to minimize the
snow effect).
In true color mode you see three copies of the desired image
shifted horizontally by about 200 pixels.
I think all this trouble is caused by the second card not
being initialized correctly.
Xfree 4.2 - seems to work completely in true color mode. In pseudo color
mode had a problem because Xfree 4.2 has a different default
color map (with only 10 free cells) that messed up all my
applications.
Here are the interesting parts of the XF86Config-4 I used under 4.0.1
Section "ServerLayout"
Identifier "Dualhead"
Screen "Screen 1"
Screen "Screen 2" RightOf "Screen 1"
EndSection
Modeline "1280x1024" 110 1280 1328 1512 1712 1024 1025 1028 1054
############################## Head 1
Section "Device"
Driver "glint"
Identifier "Permedia2 (1)"
BusID "PCI:00:12:0"
DacSpeed 220
VideoRam 8192
Option "NoAccel"
EndSection
Section "Screen"
Identifier "Screen 1"
Device "Permedia2 (1)"
Monitor "Marconi Monitor"
## Option "overclock_mem"
DefaultDepth 8
SubSection "Display"
Depth 8
Modes "1280x1024"
EndSubSection
SubSection "Display"
Depth 24
Modes "1280x1024"
EndSubSection
EndSection
############################## Head 2
Section "Device"
Driver "glint"
Identifier "Permedia2 (2)"
BusID "PCI:00:13:0"
DacSpeed 220
VideoRam 8192
Option "NoAccel"
EndSection
Section "Screen"
Identifier "Screen 2"
Device "Permedia2 (2)"
Monitor "Marconi Monitor"
## Option "overclock_mem"
DefaultDepth 8
SubSection "Display"
Depth 8
Modes "1280x1024"
EndSubSection
SubSection "Display"
Depth 24
Modes "1280x1024"
EndSubSection
EndSection
--
+------------------------------+--------------------------------------+
| Don Russell | email: don.russell@cle.philips.com |
| Philips Medical Systems | Voice: (440)-483-5726 |
| 595 Miner Road | Fax: (440) 483-5728 |
| Cleveland, Ohio, USA 44143 | |
+------------------------------+--------------------------------------+
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