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Windows 8 and Cisco C40

We are connecting 3 locations.  2 locations have the C40 and the 3rd has an Edge75 (or 85). They all connect using a bridge.  They recently purchased new Windows 8 laptops.  When they plug the laptop into the C40 and press presentation, the image is displayed for a split second and then goes away.  If I remove all but the presenter from the conference and then display the presentation, it works and then I can add the others in via the web console of the bridge.  If they utilize their "old" Windows 7 laptops, it works fine.  Any ideas why the Windows 8 laptops are not consistantly displaying the image?

The Setup:

C40 (with 2 monitors) (TC5.0.1.275220)

C40 (with 2 monitors) (TC5.0.1.275220)

Edge 75 (with 1 monitor) (unknown version)

VCS Expressway (x7.2.2)

VCS Control (x7.2.2)

MCU4510 (v4.4)

  • TelePresence

Windows 8 and Cisco C40

Hi Dennis,

While I don't know how to fix your problem, I saw the same thing a while ago.

Windows 8 laptop plugged into a C40 while not in a call, they could bring the presentation up fine on the big screen, but as soon as they were in a call and tried to send the presentation, it didn't recognise it.  Can't remember if it was a point to point call or via MCU (8710).  The C-Series were both running some revision of TC5.1.X.

We didn't spend much time troubleshooting, just changed to an XP laptop and it worked.  Could be a resolution thing?

VIP Green

Windows 8 and Cisco C40

Hi Dennis,

This may be more related to the type of laptop you're using, or that you're using an older software version on the C40s..

I have windows 8 laptops here (HP ProBook) that are used with our C60 (TC6.3.0) without a problem.  MCU 4.4(3.57).

Maybe an upgrade from TC5.0.1 to a more recent software version would help (ie TC5.1.8 or TC6.x).  If you haven't got a service contract to enable you to get the updated firmware, see this Cisco Security Advisory which enables you to get a "free" upgrade to TC6.1 to fix the vulnerabilities in earlier software.



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