07-11-2012 04:28 AM - edited 03-17-2019 11:27 PM
Hi all,
Customer is using Lenovo T420/T420S/X220 in the company, but are experiencing problems when trying to share a presentation on their C-systems through the presentation cable.
Has anyone seen or heard anything regarding this before?
//Johan
07-11-2012 04:39 AM
Some more information what exaclty happens would be helpful here. There might always some systems or resolutions which do not work at all or not optimal.
Did they try to use a different resolution? Often 1024x768 is working quite well, locally and for the remote site.
Also did you try to use the display port (digital) instead of the vga (analog) port?
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07-11-2012 04:46 AM
The presentation is not showing up at all when you plug in the presentation cable. They have tried the same computers on their MXP systems and there they are working ok.
C-system is set to resolution auto.
Sounds like a sync issue, but don't want them to force the output to a specific resolution just yet.
//Johan
07-11-2012 05:34 AM
It could be a bad cable. I had a presentation cable issue on one of our C20's. Do you have another cable you could try?
~Doug
07-11-2012 05:43 AM
Unfortunately this is happening on all c-systems with these specific Lenovo version above, but presentation is working fine on other pc manufacturers / modells.
// Johan
07-11-2012 05:49 AM
Hi Johan,
The first thing to check is if the DVI signal is being received by the codec, you can check this by running the following command :
xstatus //dvi
*s Video Input DVI 2 Connected: False
*s Video Input DVI 2 SignalState: Unknown
** end
If this is what you're seeing that means that there is no signal from the cable. Check the following in the configuration :
xConfiguration Video Input DVI 2 Type:
Ideally, this is kept at AutoDetect. However, you can try to toggle to different options and see if you're able to get any signals.
Regards,
Mubashshir Akhtar
07-11-2012 05:51 AM
Thanks!
Will try check with customer how this goes.
Regards,
Johan
07-11-2012 05:54 AM
Also, you can enable the debug by running the following command in the API:
log output on
Once you do that, as soon as you connect the DVI to VGA cable to your laptop, you should see output like this on the API :
601503.06 VIDEOLC-0 I: VLC_readySignalSourceEvent port:DVI-I 2: unsupported signal
601503.33 VIDEOLC-0 I: VLC_readySignalSourceEvent port:DVI-I 2: have signal
601503.34 MediaStreamController I: MV::getVCSetting getOutputPortStatus initialized 1
601503.35 MediaStreamController I: MV::getVCSetting localHwCookieHint_ 24 w 1920 h 1200
601503.35 MediaStreamController I: MV::getVCSetting getOutputPortStatus initialized 0
601503.35 MediaStreamController I: MV::getVCSetting localHwCookieHint_ 32 w 704 h 576
601503.35 VIDEOCTRL-0 I: multicore encoder for (composer,641)
This would confirm that the signal is getting detected.
Regards,
Mubashshir Akhtar
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