[Openchrome-devel] [Bug 94863] No signal at VGA (crt-tube) connected to DVI port of VX900

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94863

--- Comment #46 from HuangRan <huangranbj at 126.com> ---
Hi Kevin,

  I suggest we open another thread to discuss DVI interface issue to avoid the
confliction with current John's thread for VGA port.

Thanks,
Frank

(In reply to HuangRan from comment #45)
> Hi John, 
> 
>    Sorry that I put more information on DVI test result here which is not
> related to  this VGA(crt-tube) issue.
> 
> 
> Hi Kevin,
> 
>    We give a test with OpenChrome UMS 0.4.0 driver on T510/T5555/C90LE/V90LE
> thin clients for DVI-I and DVI-D ports(C90LE and V90LE do not have DVI-D
> port) and get following results:
> 
>                  DVI-I            DVI-D
> T510              fail             suc
> T5555             fail             suc
> C90LE             fail              X 
> V90LE             suc               X
> 
>    From the result we tested, it shows for DVI-D port for T510/T5555, the
> UMS driver is working fine; By contrast, for T510/T5555 DVI-I port, the UMS
> driver is failed to work. The possible reason is that DVI-I uses a external
> TMDS transmitter Silicon Image Sil164 which current UMS driver does not
> support.
>    For V90LE and C90LE, the result is very interesting because they both
> uses VT1632 as the external TMDS transmitter, but the result is totally
> different.
> 
> Thanks,
> Frank

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