mathis Posted July 21, 2012 Share Posted July 21, 2012 Hi! I am running a 3-port (DVI, HDMI, VGA) ATi 6770 card which is flashed to a 5770 in order to run on Lion. Two displays are connected to the DVI and the HDMI port. All is working great up to the point where I put the machine to sleep. After waking up there is no signal coming out of the HDMI port. System Information still shows the monitor and there still are windows on that desktop but the display stays dead. What I tried already is setting the AtiPorts key to 3 in boot.plist. Edit: Even after unplugging (gets detected, only one display attached) and replugging (gets detected again) the output on the port is just black Any help/ideas/tips are greatly appreciated. If you need any files (dsdt etc) just say so. The machine is a Gigabyte g41mt-d3v mainboard, core2duo processor and a 1Gb ATi 6770(5770) graphics card. Thanks! Link to comment Share on other sites More sharing options...
jonisign Posted July 27, 2012 Share Posted July 27, 2012 I have the same problem... Except display port doesn't work either... Link to comment Share on other sites More sharing options...
jonisign Posted July 28, 2012 Share Posted July 28, 2012 any update on this? Link to comment Share on other sites More sharing options...
jamdox Posted July 30, 2012 Share Posted July 30, 2012 Big fat bump on this one! I'm having a similar problem with my MSI R5770. I only have one monitor on displayoport and it stops working after waking from sleep, although plugging in the DVI cable enables it to work again. Does anyone with a reference layout 5770 have this problem? If so, it could just be a 10.8 glitch. Link to comment Share on other sites More sharing options...
jonisign Posted July 31, 2012 Share Posted July 31, 2012 Same problem with an XFX 5850... maybe it's an issue with all 5700/5800 cards? Link to comment Share on other sites More sharing options...
jamdox Posted August 1, 2012 Share Posted August 1, 2012 Word over at tonymac is that this is an old issue that has been dealt with ###### and in greater depth ###### Let's see what happens? 1 Link to comment Share on other sites More sharing options...
jonisign Posted August 1, 2012 Share Posted August 1, 2012 Looks like someone fixed it over there! Let's see if we can get a more detailed explanation for how to do it ourselves? Thanks again for the tipoff! Link to comment Share on other sites More sharing options...
who_s_there Posted October 28, 2012 Share Posted October 28, 2012 I had a similar issue with my new i7-3770 and ATI HD 5770. Sleep was OK but at wake up screen stays black. I've finally found the solution : In order for OSX to control perfectly the graphics card (and not the internal HD4000), I needed to set PciRoot=1 on /Extra/org.chameleon.Boot.plist May be that could help you guys Link to comment Share on other sites More sharing options...
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