mincingleprechaun Posted October 1, 2009 Share Posted October 1, 2009 So I've been harping on trying to get a full 2560x1600 out of my 30" monitor since I successfully installed OSX. I've tried lots of fixes and different methods always with some success being able to get QE/CI and 1920x1200 but never the full res. One of the DVI's would reliably deliver 1920x1200 and the other a black screen that was "alive" meaning black but not in powersave mode. Tonight I decided to connect a second monitor that I had sitting around just to see if I could get dual monitors happening and do some experiments. Hey, it worked! I had 1920x1200 on one and the other 1280x1024 or something like that. For laughs I tried swapping the connectors so that monitor 1 was now monitor 2 and vice-versa. When the computer booted I got what I kind of expected. The small monitor was working but the 30" went black right after the blue screen and stayed that way. I left the computer for awhile and came back into the room and the monitors had gone to sleep. Both had amber power indicators to show they were in powersave mode. I grabbed the mouse and both monitors flickered and the little one came to life as I expected... and then suddenly the 30" monitor was shining brightly at me with my extended desktop in glorious 2560x1600 resolution. For some reason waking the monitor from sleep brought it to life. I changed the powersave mode to put the monitor to sleep in 1 minute, shut down, disconnected the second (smaller) monitor and rebooted. The machine rebooted and the screen turned black shortly after the blue screen appeared. After about one minute the montior went to sleep and the blue power lamp turned amber. I moved the mouse and it came out of sleep to be fully functioning. Yahoo! My advice to the black screen suffering among us is to boot to the desktop if you can, set your power management setting for the monitor to sleep after one minute and see if you can get your black monitor to come to life. I will happily answer any question that I can about how I got this working. Link to comment https://www.insanelymac.com/forum/topic/189890-finally-2560x1600-and-a-way-past-the-black-screen-problem-with-my-hd4870/ Share on other sites More sharing options...
feng'a Posted October 2, 2009 Share Posted October 2, 2009 just saw this thread. this worked for me, except I did it a slightly easier way. i went into expose and programmed the bottom left corner to sleep display on demand, and did what you did (except in my case I moved the mouse to the bottom left... left it for about 4-5 seconds) wiggled the mouse, and presto... 2560x1600x32 in all its glory! thanks for the tip. Link to comment https://www.insanelymac.com/forum/topic/189890-finally-2560x1600-and-a-way-past-the-black-screen-problem-with-my-hd4870/#findComment-1287614 Share on other sites More sharing options...
bm2 Posted October 3, 2009 Share Posted October 3, 2009 I saw this thread, after replying to your original. I'll quote the reply, since it has a more permanent solution: I have a 3008WFP running through an XFX 4890, on a ud5 board. I definitely had to play detective, on a number of issues. My 4890 has two dvi ports. Here's what I found: * Dual link only works out of port-2; port-1 is single link only, for now. * Chameleon/pc_efi10 needs the option "Graphics Mode"="2560x1600x32", or the display is black, after startup ...without that option set, recovery from this state requires either putting the display to sleep via control+shift+eject, or unplugging/re-plugging it in * With a dual-link screen active (port-2), plugging an additional screen into port-1 port invokes a kernel panic, under 10.6 * Evoenabler is required, to run in 64-bit mode -- aty_init and efi strings both fail here, in different ways ...Evoenabler is only configured for the 4890, by default. It can be modified for the 4870 as well, though Link to comment https://www.insanelymac.com/forum/topic/189890-finally-2560x1600-and-a-way-past-the-black-screen-problem-with-my-hd4870/#findComment-1288210 Share on other sites More sharing options...
feng'a Posted October 3, 2009 Share Posted October 3, 2009 I saw this thread, after replying to your original. I'll quote the reply, since it has a more permanent solution: and a permanent solution that works thanks for that modified my Chameleon 2 com.apple.boot.plist file with the Graphics mode thing and it worked beautifully. I've been meaning to do that for a million years and this just forced me to heh Link to comment https://www.insanelymac.com/forum/topic/189890-finally-2560x1600-and-a-way-past-the-black-screen-problem-with-my-hd4870/#findComment-1288480 Share on other sites More sharing options...
mincingleprechaun Posted October 5, 2009 Author Share Posted October 5, 2009 and a permanent solution that works thanks for that modified my Chameleon 2 com.apple.boot.plist file with the Graphics mode thing and it worked beautifully. I've been meaning to do that for a million years and this just forced me to heh And all at once it's behind me! I had a little trouble because I accidentally left a ">" off one of the "Graphics mode" tags. It would still boot but without the graphics mode and it wouldn't let me mount the EFI to fix it after the fact. I have another OSX install that I use for experimenting and I was able to mount /Volumes/EFI and modify the com.apple.Boot.plist from that install. I just made sure I was mounting the right EFI partition. It worked perfectly. I finally have a fully functioning OSX install with all my onboard hardware fully functioning. I guess I can now start thinking about 10.6. I might do that in November or December. I think I will just get some work done and not fool with it for awhile. Thanks for the info! Link to comment https://www.insanelymac.com/forum/topic/189890-finally-2560x1600-and-a-way-past-the-black-screen-problem-with-my-hd4870/#findComment-1289963 Share on other sites More sharing options...
stuntmanz Posted November 15, 2009 Share Posted November 15, 2009 I have the same problem too, but my resolution is 1680x1024. After installing the kext and after restart I have the normal res. But after another restart there is only black screen. I tried this solution with setting the sleep corner, but when I set it there was a message saying to hold down the power. And after restart I got the white screen and the restart of my machine. Although, thanks for the solution! Link to comment https://www.insanelymac.com/forum/topic/189890-finally-2560x1600-and-a-way-past-the-black-screen-problem-with-my-hd4870/#findComment-1331457 Share on other sites More sharing options...
crashnburn_in Posted November 27, 2009 Share Posted November 27, 2009 Which PCIe / PCI Express / PCI X card (s) have driver support for 2560 x 1600 resolution on a Leopard or Snow Leopard? It could be any brand. NVidia, ATI or other. Preferably it can fit an Advanced Dock for T61. As I understand it, I will need a full-height, half-length PCIe video card. Please advise. Thanks. Link to comment https://www.insanelymac.com/forum/topic/189890-finally-2560x1600-and-a-way-past-the-black-screen-problem-with-my-hd4870/#findComment-1343827 Share on other sites More sharing options...
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