Display not detected under 10.6.4

[paulyg]

Hello! I'm using a Kensington adapter with my MacBook Pro (Core 2 Duo) running OS 10.6.4 and, whichever version of the DisplayLink driver I install, the additional display is not detected. I've tried it plugged directly into a USB port and through a hub, with a DVI or VGA monitor attached and nothing seems to make a difference. I can see that the DisplayLink driver is installed (I've currently got 1.6b2 installed) when I look in Extensions in System Profiler.

The adapter works fine with the same machine if I book into Windows Vista, so I know there's not a hardware problem. I've completely run out of ideas to make it run under Mac OS X, though. Anybody have any suggestions? Or are there any diagnostics I can run?

Paul.

[paulyg]

Have just spotted the debug tool. Output attached.

Paul.

[Carlo]

It's strange, it looks like the drivers are not loaded: they do not appear in the ioregistry. But there are a few lines logged anyway.
It seems that we never tried to connect to a display: no logs have been created.
Unfortunately the snippet of system.log in the profile is not very useful because Chrome swamped it with errors.
You could send me the compressed /var/log/system.log file (use shift-command-g to reach that folder from the Finder) for the complete story.

[paulyg]

Here's the system.log file.

[Carlo]

Ok it's official, the driver is not loading. There is no clue about why so the solution is the usual.. repair the disk permissions with Disk Utility and install again the DisplayLink software.

[paulyg]

Repaired permissions, reinstalled and it's now working!

Thanks so much for your help - much appreciated.

Paul.

[siksik6]

Hi,

I have exactly the same issue, but unfortunately a repair permissions did not fix my issue :(

I attach my system information in the hope it proves useful.

thanks

Mark

[Carlo]

In this case part of the driver can't be started. Might be an installation problem: I see many installations failed in the past with inconsistent errors.
The last installation did not have issues but it seems that something is still wrong. I'd try again: uninstall, repair permissions, reboot, install.

Hi,

I have exactly the same issue, but unfortunately a repair permissions did not fix my issue :(

I attach my system information in the hope it proves useful.

thanks

Mark

[siksik6]

Hi,

thanks for the reply.

It actually randomly started working yesterday without be doing anything other than rebooting.

This morning it stopped working, so I performed the above steps, and now working again. If it doesn't stay working, I'm going to have to send this product back - no way should it be this unreliable.