Memory leak in latest driver
 

Hello DisplayLink,

I have diagnosed a memory leak in the dlcdcncm6_x64.sys driver which causes my 8 gig of rams on my laptop to rapidly be allocated and then the system crashes.

I have attached the usual log files as well as a dump file from the wdk tool poolmon, which shows the tag "NBLP" to be allocating memory and never realeasing it. It seems to has side effects as not all of the pool is taken up by this driver.

Follow-up
 

Any news ?

Hi,

I've raised this internally for investigation.

Thanks,
James

Hi,

Can you let me know if this happens if the dock is connected to a USB 2.0 port?

Thanks,
James

Hi James,

I did a quick test over usb 2 and the problem still arrises. My Non-Paged pool was at 218 megs and after transferring a 700 meg file, it went up to 1.3 gigs. Besically, it`s like the buffers used to copy the data from the nework card to os are never released.

I am a software developer if i can assist with anything special.

Since i have declared the problem, i have upgraded to Windows 8.1 rtm and the problem tstill arises.

Hi,

Thanks for the info.

Aside from the applications listed that the support tool captures (in the Installed_Programs.txt file) are there any other applications installed?

Do you have any filter drivers installed?
Can you provide details of any networking related software you have installed?

If possible can you provide the logs from your Windows 8.1 install as well?

Thanks,
James

Here are the log files for the Windows 8.1 setup.

I do development work so my installed software is basically
Visual Studio 2013
Visual Studio 2012
Office 2013
SQL Server 2012

and a few utilities...

no special filter drivers installed

I've PMed you about this. Could you check your inbox.

Thanks

Wim

Same here
 

Windows 8 Samsung S9, latest driver memory leak for me too, it consumes 8GB after a few hours, more quickly sometimes.

Targus ACP71USZ

I reverted from 7.4M0 to 7.3M1 and the problem disappeared. I got a warning about wrong version in the displaylink hardware when I downgraded, but it works ok.

We shared a dev Ethernet driver with tuath and this has fixed the memory leak. Will be included in our next driver update, 7.4 M1, later this month.

Wim

Ethernet problem with downgraded drivers
 

However I seem to have severe ethernet performance problems using the 7.4M0 firmware and the 7.3M1 software.

I have disconnected the ethernet temporarily, but if you can give me access to the Beta or accelerate the release process it would be appreciated.

thanks,
Edwin

Same here
 

Same issue here - Windows 8.1 and np pool is being completely depleted during network usage. Any chance of getting access to the fixed driver for ethernet before the end of the month?

Hi,

R7.4 M2 is now available - can you try this version?

Thanks,
James

R7.4m2
 

That seems to have resolved the memory leak for me