Hello,
This issue seems sporadic and hard to reproduce every time. I am using a CSV-5300H connected to a R9 290 card, running a total of 6 monitors.
· 1x Display via an HDMI cable to HDMI port on the card.
· 2x Display via DVI cables to DVI ports on the card.
· 3x Display via HDMI cables to HDMI ports on the MST hub.
Originally, I would lose monitors with an error stating that the maximum number of monitors has been exceeded on the display port. At this time, I am not longer receiving this message, though i am still having the sleep issue (very repeatable). It is my understanding that this was an issue that was fixed in previous revisions of Catalyst (current version is 14.12).
If I put the computer to sleep (SSD and monitors), the display port monitors will not wake up. Once the computer is restarted, the monitors are restored. If the computer is not immediately restarted (within 5 minutes), I must cycle the power to the hub. The monitors are connected directly with an HDMI cable.
I have also been in contact with AMD. So far, they are thinking this may be an issue with the MST hub. Possibly a firmware update??
As a side note, it might be in Club 3D's interest to get on this AMD Recommended Devices list:
http://support.amd.com/en-us/recommended/dpcapable
Any help is appreciated!