Wake from sleep issue with 2010 Mac Pro and el Capitan

[camner]

After upgrading to El Capitan (10.11.2) my 2010 Mac Pro (Radeon 5770 card) has trouble waking from sleep. The machine wakes but there is no video signal (I'm using 2 monitors with the mini DVI ports). It is somewhat inconsistent, but the longer the machine is asleep the more likely it is to have a problem. The keyboard and mouse seem responsive.

Any others experiencing this and have found a workaround?

 

[star-affinity]

Hmm… I have the same issue with NVIDIA GTX 970 graphics in Sierra: https://forums.macrumors.com/thread...getting-video-when-waking-from-sleep.2032769/

I thought the problem was related to the Web Drivers for the NVIDIA graphics card, but maybe it isn't? I have to put in the AMD card that came with my computer and see… If still happens, it seems it's up to Apple to fix.

 

[h9826790]

In my experience, sleep in El Capitan not working very well, but Sierra works flawlessly. You may consider further upgrade to Sierra.

 

[star-affinity]

In my experience, sleep in El Capitan not working very well, but Sierra works flawlessly. You may consider further upgrade to Sierra.

I'm on Sierra (10.12.3) and the problem is there too for me.

Edit:

I've found out my wake issue is related to waking the computer from another Mac using Apple Remote Desktop.