Quote from: lbr on July 29, 2014, 07:52:04 AM

Quote from: MrJay on July 29, 2014, 07:30:45 AM

I checked the box for Modify Registry and ran the app, restarted the machine and still had one of the cards showing a 43 error code. I then checked the box for Modify Registry and Force, ran the app and also merged the reg file manually then restarted and all cards were working. I should have restarted first without merging the reg file to test properly but it had been a long day so sorry for the poor testing there.

Hm.. maybe I do have some bugs in 'Modify Registry'.. Or not.. Sadly I've not implemented reporting mod results back to me so I could find what exactly is going on.. Anyway, will check.

Quote from: MrJay on July 29, 2014, 07:30:45 AM

Headless, I was running windows 7 x64 with 6x Sapphire Tri-x 290's and mining Monero but kept getting lockups with any of Claymore's miners past 3.4 so I decided to give windows 8.1 a try. I have four of these rigs but testing on two of them, if I remove the monitor and then teamviewer in, all I get is a black screen. This issue was present before the mod and I have read a few people stating the exact same thing - http://www.reddit.com/r/litecoinmining/comments/1wdawz/headless_windows_81_290x/ - With windows 7 I was restricted to a 640x480 teamviewer window, but at least I could see the desktop and there was just enough space to use the machine, windows 8.1 I get nothing. I have ordered a few of these - http://www.amazon.co.uk/gp/product/B00C9UB9OK/ref=oh_details_o00_s00_i01?ie=UTF8&psc=1 - as the cards only have dvi-d, hdmi and display port and all of the dvi converters I have are dvi-i > vga. Fingers crossed.

Yeah.. 640x480 also pisses me off. I've solved it by plugging dummy display emulator - into one of the cards ; )
This restriction comes from some mess about display detection logic and unlikely to be fixed ever.
http://social.technet.microsoft.com/Forums/windows/en-US/8a9b5aa7-fe33-4e6d-b39b-8ac80a21fdc2/disable-monitor-off-detection-how?forum=w7itprogeneral
Long and sad story how certain software and hardware manufacturers could not or didn't want to make things 'right'.

Try -
setx DISPLAY ":0"
and reboot, without this my Windows Server rigs don't work headless and both TeamViewer and some VNC servers show black screen.

Thanks for the link to the hdmi dummy plug, if these others that I have bought don't work I will try them and I'll give the setx command a go, will let you know how that works out.