Hi all,
I have a via CN10000EG board with a CN700 graphics chip and am trying to use it
with openchrome for PAL tv-out. Primarily I want to be able to overscan to
remove a big black border, but more generally I've noticed that some of the
supposed supported modes are not available so I think this may be a more
general problem with my setup.
The openchrome driver is the 0.2.904 from the downloads page, and xvmc etc are
working, so the driver is at least mostly installed correctly.
My understanding, from much googling, is that the correct modelines are
available in the driver and have to be selected by setting:
Modes "640x480Over"
in the screen/Display section of xorg.conf, where I currently have:
Modes "640x480"
However, if I use this setting I get "No screens found". This is true for
"720x576Over" and "720x576NoScale" as well. Looking in /var/log/Xorg.log I see:
~$ grep "Over" /var/log/Xorg.0.log
(II) CHROME(0): Not using mode "800x600Over" (no mode of this name)
(II) CHROME(0): Not using mode "720x576Over" (no mode of this name)
(II) CHROME(0): Not using mode "640x480Over" (no mode of this name)
~$ grep -i "NoScale" /var/log/Xorg.0.log
(II) CHROME(0): Not using mode "720x576NoScale" (no mode of this name)
~$ grep -i "ModeLine" /var/log/Xorg.0.log (and the lines before added, they
might be relevant)
(**) CHROME(0): *Built-in mode "640x480": 0.0 MHz, 37861.1 kHz, 73.3 Hz
(II) CHROME(0): Modeline "640x480"x73.3 0.00 640 0 0 0 480 0 0 0 (37861.1
kHz)
(**) CHROME(0): *Built-in mode "720x576": 0.0 MHz, 35855.8 kHz, 60.6 Hz
(II) CHROME(0): Modeline "720x576"x60.6 0.00 720 0 0 0 576 0 0 0 (35855.8
kHz)
(**) CHROME(0): *Built-in mode "800x600": 0.0 MHz, 48077.4 kHz, 72.7 Hz
(II) CHROME(0): Modeline "800x600"x72.7 0.00 800 0 0 0 600 0 0 0 (48077.4
kHz)
(**) CHROME(0): Built-in mode "720x540"
(**) CHROME(0): Built-in mode "720x480": 0.0 MHz, 29799.6 kHz, 60.5 Hz
(II) CHROME(0): Modeline "720x480"x60.5 0.00 720 0 0 0 480 0 0 0 (29799.6
kHz)
The relevant sections of xorg.conf are at the end. I'm confused as to why the
X can't find the "640x480Over" etc. I can see they are defined in
via_vt162x.h, everywhere but the VT1625 tables (which I have). So I tried
replacing the "640x480" modeline with the VT1623 tables modeline in the two
tables, which alas changes nothing. I also tried changing the via_mode.h in
the same way.
All those 0's in the "built-in" section above are suspicious. I wonder if none
of the modes defined in the via_vt162x.h are being found, and X is using some
internal fall back?
Does anyone have any idea how to go about fixing this, or at least finding more
out about where it is going wrong?
Thanks
Dan
Xorg.conf snippet (Some of it is obviously unnecessary - I was trying things
for the unichrome driver):
Section "Monitor"
Identifier "TV"
HorizSync 24.0 - 80.0
VertRefresh 50.0 - 74.0
# Set for 16:9 display
DisplaySize 400 225
#Refresh Rate 60Hz
ModeLine "720x480" 26.7 720 736 808 896 480 481 484 497
ModeLine "720x576" 32.7 720 744 816 912 576 577 580 597
ModeLine "848x480" 31.5 848 864 952 1056 480 481 484 497
ModeLine "856x480" 31.7 856 872 960 1064 480 481 484 497
EndSection
Section "Device"
Identifier "VIA"
Driver "openchrome"
Option "SWCursor" "on"
Option "TVOutput" "S-Video"
Option "ActiveDevice" "TV"
Option "VBEModes" "true" # Comment in for TV-out
EndSection
Section "Screen"
Identifier "Default Screen"
Device "VIA"
Monitor "TV"
DefaultDepth 16
SubSection "Display"
Viewport 0 0
Depth 24
Modes "640x480" "720x576" "800x600" "800x600Over"
"720x576Over" "720x576NoScale" "640x480Over"
EndSubSection
SubSection "Display"
Depth 16
Modes "640x480" "720x576" "800x600" "800x600Over"
"720x576Over" "720x576NoScale" "640x480Over"
EndSubSection
EndSection
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