DisplayLink Forum - View Single Post - graphics performance drop after system sleep

patrickdempsey · 09-29-2011, 11:34 PM

I am certainly having the same issue on version 3 and 4 of the beta.

After the Macbook goes to sleep (with the DisplayLink Beta 4 for the 1.7 installed), it is then slow on scrolling/zooming graphics upon resuming from sleep. The Activity Monitor isn't being overtaxed...I have the fully maxed out Macbook Air 1.8 with 4GB ram and the % of CPU usage never going much above 12% when scrolling in Safari.

It is strange because it seems to primarily impact Safari and Chrome's ability to scroll smoothly and quickly. PDFs and Word documents are also impacted in their scrolling, albeit less than web pages. Moving windows around on the screen and playing movies does not appear to be impacted at all. Ironically, scrolling on a page with an actively playing flash video fixes the problem...and it is also fixed when I pause the flash video...but it goes back to the same jerky and slow web scrolling when I go back to a regular webpage. For example, scrolling up and down when 720p flash video from Vimeo or Youtube is being played in the browser window is butter smooth...but going back to the home page of Vimeo or Youtube makes the jerky/slow scroll/zoom return immediately.

The problem persists even after disconnecting the displaylink and even when on the Macbook's native screen only.

The problem is fully resolved by a reboot.

After another sleep session, the problem returns with the same symptoms as listed above.

If I uninstall the Displaylink Driver, the problem never appears, even after sleep sessions. The problem returns upon reinstalling the Displaylink driver.

This leads me to believe that it is definitely being cause by the Displaylink driver. It is not a CPU resource issue or even a purely graphics resource issue because the problem is temporarily resolved by scrolling on a page that has active playback of flash video. Don't know much about this type of technology, but it would seem that resources are being directed AWAY from scrolling unnecessarily after sleep when this driver is installed.

I can do a video and send it in of the symptoms if requested...the problem can be replicated 100% of the time under the conditions above.

Patrick Dempsey
Processor 1.8 GHz Intel Core i7
Memory 4 GB 1333 MHz DDR3
Graphics Intel HD Graphics 3000 384 MB
Software Mac OS X Lion 10.7.1 (11B2118)

09-29-2011, 11:34 PM	#17
patrickdempsey Junior Member Join Date: Sep 2011 Posts: 6	Having the Same Problem on Macbook Air I am certainly having the same issue on version 3 and 4 of the beta. After the Macbook goes to sleep (with the DisplayLink Beta 4 for the 1.7 installed), it is then slow on scrolling/zooming graphics upon resuming from sleep. The Activity Monitor isn't being overtaxed...I have the fully maxed out Macbook Air 1.8 with 4GB ram and the % of CPU usage never going much above 12% when scrolling in Safari. It is strange because it seems to primarily impact Safari and Chrome's ability to scroll smoothly and quickly. PDFs and Word documents are also impacted in their scrolling, albeit less than web pages. Moving windows around on the screen and playing movies does not appear to be impacted at all. Ironically, scrolling on a page with an actively playing flash video fixes the problem...and it is also fixed when I pause the flash video...but it goes back to the same jerky and slow web scrolling when I go back to a regular webpage. For example, scrolling up and down when 720p flash video from Vimeo or Youtube is being played in the browser window is butter smooth...but going back to the home page of Vimeo or Youtube makes the jerky/slow scroll/zoom return immediately. The problem persists even after disconnecting the displaylink and even when on the Macbook's native screen only. The problem is fully resolved by a reboot. After another sleep session, the problem returns with the same symptoms as listed above. If I uninstall the Displaylink Driver, the problem never appears, even after sleep sessions. The problem returns upon reinstalling the Displaylink driver. This leads me to believe that it is definitely being cause by the Displaylink driver. It is not a CPU resource issue or even a purely graphics resource issue because the problem is temporarily resolved by scrolling on a page that has active playback of flash video. Don't know much about this type of technology, but it would seem that resources are being directed AWAY from scrolling unnecessarily after sleep when this driver is installed. I can do a video and send it in of the symptoms if requested...the problem can be replicated 100% of the time under the conditions above. Patrick Dempsey Processor 1.8 GHz Intel Core i7 Memory 4 GB 1333 MHz DDR3 Graphics Intel HD Graphics 3000 384 MB Software Mac OS X Lion 10.7.1 (11B2118)