USB dropping out every time Mac wakes from Sleep

[Chrisbbarnes]

My Mac Pro 2.1 has been dropping out all the USB devices ever since an update to 10.6.8. Every time I wake my Mac up from sleep the USB devices seams to not have any power to them. Microphone and isight work but no lights. UPS does not work. I have to restart my machine before I can get them back working. Contacted Apple Care support (although now out of phone time help period). They have never heard of this problem before and want to charge me $60 to try thing that might not fix the problem. I did try the restart with "option, command and P & R buttons pressed whilst boot up, but it did not fix.

Does any on else have any suggestions on how to fix this anoying problem?

 

[Chrisbbarnes]

No USB power to PCI express cards UPDATE

Today I did a clean install of S.L. up 10.6.7 (on a new drive). All was fine with my USB devices and they all worked when I woke my Mac Pro from sleep. So I then started to carry out a software update (with avoiding 10.6.8, thinking this was the cause of my problem). Well, I went down the list and updated one by one until I installed "Remote Desktop Client". Then after putting my Mac to sleep and then waking up again... No Power to USB (ones from PCI express cards).
I think I have solved part of my problem. So next (not today) I will start again and avoid "R.D.C." update. You never know, I might even get as far as updating to 10.6.8. It may be R.D.C. after all.

I will keep you all posted.