[Openchrome-users] Not enough bandwidth?

[Xavier Bachelot]

Floris Bruynooghe wrote:
> Hello
> 
> I was trying to get the openchrom dirver to work (from trunk) on a
> K8M890 but seem to run into a problem:
> 
> [...]
> (II) CHROME(0): ViaValidMode: Validating 1680x1050 (147140)
> (II) CHROME(0): ViaModePrimaryVGAValid
> (II) CHROME(0): Required bandwidth is not available. (423370592 > 74000000)
> (II) CHROME(0): Not using default mode "1680x1050" (mode clock too high)
> [...]
> 
> After a lot of similar things it falls back to 640x480 which is really
> not very nice.  Before that it rejects a lot of modes due to out of
> range v and h syncs etc, but they all look fine.  However then it
> starts to do bandwidth checks and rejects everything appart from the
> 640x480.
> 
> When using the propriatry via driver however, it can do 1680x1050 so
> the bandwidth must be there?  Any hints on what could be wrong?  Here
> some config extracts:
> 
> #Modules: i2c, bitmap, dcc, dri, extmod, freetype, glx, int10, vbe
> 
> Section "Device"
>         Identifier      "OpenChrome"
>         Driver          "openchrome"
>         BusID           "PCI:1:0:0"
> EndSection
> 
> # The monitor is actually a Samsun SyncMaster 225BW
> Section "Monitor"
>         Identifier      "openchrome"
>         Option          "DPMS"
> EndSection
> 
> Section "Screen"
>         Identifier      "Openchrome Screen"
>         Device          "OpenChrome"
>         Monitor         "openchrome"
>         DefaultDepth    24
>         SubSection "Display"
>                 Depth   24
>                 Modes   "1680x1050"
>         EndSubSection
> EndSection
> 
> 
> Lastly a warning, I don't really know much about video and how
> everything is supposed to work (but I like X to have many terminals
> and emaces viewable at the same time...).  But any help will be
> greatly appreciated.
> 
> Regards
> Floris
> 
The configuration looks fine, but no one can tell what is really 
happening without the full xorg logs.

Regards,
Xavier