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Old 02-07-2013, 03:51 AM   #1
CSparrow
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Default Win7 + Nvidia + Toshiba Dynadock - Flickering display

Hi

Have an Acer Travelmate 8481G Ultrabook with Windows 7 Pro.
Has a built in Nvidia GT 520M.
Have a Toshiba Dynadock V (PA3778A-1PRP) (DisplayLink device)
Am intermitantley getting flickering on the screen.
Only lasts for a second or two.
Happens about 8 times per day.
Is happening on several systems all same as above.

Have just installed the DisplayLink 7.1 M1 driver
Same problem.

On one unit am running the latest Nvidia driver 310.90 suit GT 520M Notebook.
Others have the original Acer/Nvidia driver. (28/1/12 - 8.17.12.9555)

Did notice in device manager the DisplayLink driver details 4/9/12 - 7.0.41409.0
Is this correct for 7.1M1?

We know it is the fault of the Dynadock / DisplayLink as we have resetup one unit without a Dynadock and worked fine for several weeks.

When will this fault be corrected?
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Old 02-07-2013, 11:21 AM   #2
Wim
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Need the logs just after it happens, and also if there are any events from dwm.exe in the event manager.

Wim
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Old 02-12-2013, 06:33 AM   #3
CSparrow
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Logs as per request

Have discovered something

When running diagnostics on KFUltrabook mentions USB 3.0 driver may be issue (logs supplied)

Have updated firmware and driver on another unit (TBUltrabook)
Then made sure running latest 310.90 nvidia driver
Also then updated displaylink driver to 7.1M1
Now I have a different fault
Constant screen flashing (rename file to remove .zip off end of file)
(see logs and video)
If you disconnect the dynadock the display will stop flashing

Windows event logs show pretty much nothing
Attached Files
File Type: zip KFULTRABOOK_20130212_153959.zip (424.3 KB, 0 views)
File Type: zip TBULTRABOOK_20130212_180226.zip (631.6 KB, 1 views)
File Type: zip TBUltrabook Flashing Screen.MOV.zip (1.23 MB, 1 views)
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Old 02-13-2013, 10:12 AM   #4
Wim
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It looks like the OS is constantly changing the display settings for some reason. That is all I can see in the logs, as they only capture the last changes.

Could you:
  • Disable the DisplayLink service
  • Delete everything out of c:\program files\displaylink core software\debug\
  • Enable Advanced logging from the DisplayLink support tool
  • Start the displaylink service
  • Let it flash and capture the logs

Once you've captured the logs, stop the service and disable advanced logging, otherwise it will start to fill your disk up!

Thanks

Wim
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Old 02-14-2013, 04:58 AM   #5
CSparrow
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as per request

advanced logs
Attached Files
File Type: zip TBULTRABOOK_20130214_164755.zip (1.14 MB, 1 views)
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Old 02-15-2013, 09:56 AM   #6
chrom
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same problem with Lenovo X1 Carbon USB 3.0 with Lenovo USB 3.0 Doc and 2 monitors
+ quality degradation if web sites have flash on it. OS Win7-Ent 64bit

Last edited by chrom; 02-15-2013 at 10:01 AM.
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Old 02-27-2013, 01:59 AM   #7
CSparrow
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Am wondering how you are going with this?
ETA for new version of driver with a fix?
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Old 02-27-2013, 04:10 PM   #8
Wim
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Yes - We understand the problem, and it's due to the way Windows 8 gives us the screen pixels.

We have a possible fix for the quality issues on Windows 8, and it should be included in the next release.

Wim
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Old 02-28-2013, 10:35 PM   #9
CSparrow
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This is Windows 7 not Windows 8

When do you expect to make available the next release?
(1 week, 1 month, ???)
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Old 04-04-2013, 02:31 AM   #10
CSparrow
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Default New driver 7.2 M0 - Same fault - Flashing screen

I see that their is a new DisplayLink driver available version 7.2 M0

I have just installed this version of driver and have the same fault
Screen is constantly flashing (same as previous posted video footage)

Tried with the latest Nvidia 314.22 driver
Same fault

This is a Windows 7 Pro 32bit laptop
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