Monitor flickering with T500 with accell dual-link-dp adapter

I have an HP LP3065 30 inch external monitor, 2560x1600, that I'd like to drive off my T500. I am now on my second accell display-port to dual link dvi adapter and am still getting periodic blackouts of the monitor which last less than a second. At first I thought it was due to insufficient power to the adapter provided through the usb port, as has been reported in various places, so I got a high powered usb hub with ac adapter. Didn't help. Accell said it must be a lenovo problem and that they had "reported" the issue to lenovo. I exchanged the adapter for a new one on the off chance it might be a manufacturing issue but the new one is just the same. Has anyone gotten this configuration to work properly? If so, what dp-dual link dvi adapter are you using? Any special adjustments to your settings? I have the ATI Mobility Radeon 3650 card. All drivers are current as is the BIOS.
Solved!
Go to Solution.

Hi greigite,
Welcome to the Lenovo forum!
Is the Accell B087B-002B the adapter you are using? I haven't used such an adaper, but it looks very nice. It gets excellent reviews on Amazon, though at least one reviewer recommended connecting it to a powered USB hub to eliminate display flickering. You've done that already -- suppose you could try a different powered USB hub on the off chance that the first one is defective, but that seems unlikely.
You might have a look at the power-saving features of your ATI video card. I think you can right-click on your desktop to start "ATI Catalyst Control Center" (if not, think you can find it in the Start menu). One of the panels of CCC lets you adjust power saving profiles, and whether to reduce the vertical refresh rate below the usual 60 Hz. You could try turning the vertical refresh rate reduction feature off, and maybe try some different power-saving profiles.
How often does the flickering occur? Like, once every 20 minutes, or less often?
Best regards,
Frank
Results of Your Ideal Business-Class Laptop survey, concluded 2009-07-29.
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http://www8.hp.com/us/en/contact-hp/ww-phone-assist.html
Thank you for posting on the HP Forums. Have a great day!
MechPilot
I work on behalf of HP
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Björn Herrmann wrote:
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Monitor flickering with T500 with accell dual-link-dp adapter