Hello!
I've got a very annoying problem. I had a Sapphire HD 5770 and wanted it to connect with my BENQ BL2400 with DisplayPort (no adapters/converters what so ever involved, just DP->DP). Before I connected to display with DVI but then I wanted to setup two additional displays which both only support DVI and because the BENQ doesn't support HDMI the only other way to have three displays connect to the graphics card was using the DisplayPort. I therefore bought a DP cable which works nicely on my Dell laptopbut didn't display anything with the Sapphire HD 5770. Because both cable and BENQ worked fine with my laptop, I assumed that the DP-Out on the HD5770 was broken and exchanged the card with a Sapphire HD 6870 hoping that everything would work fine. Back home, the new card is now having exactly the same problem: BlackScreen/"No DP-Signal" on the display or sometimes it works but has a lot of graphic errors (flicker, bars...).
The problems start as soon as the ATI-Drivers load (both Windows 7 64bit and ArchLinux with newest Catalyst). Before the drivers start up, the output is just fine, no errors.
I would really really appreciate any help, I don't want to return the second card too, telling the reseller again that DP is broken on that card.
Thanks a lot in advance!
I've got a very annoying problem. I had a Sapphire HD 5770 and wanted it to connect with my BENQ BL2400 with DisplayPort (no adapters/converters what so ever involved, just DP->DP). Before I connected to display with DVI but then I wanted to setup two additional displays which both only support DVI and because the BENQ doesn't support HDMI the only other way to have three displays connect to the graphics card was using the DisplayPort. I therefore bought a DP cable which works nicely on my Dell laptopbut didn't display anything with the Sapphire HD 5770. Because both cable and BENQ worked fine with my laptop, I assumed that the DP-Out on the HD5770 was broken and exchanged the card with a Sapphire HD 6870 hoping that everything would work fine. Back home, the new card is now having exactly the same problem: BlackScreen/"No DP-Signal" on the display or sometimes it works but has a lot of graphic errors (flicker, bars...).
The problems start as soon as the ATI-Drivers load (both Windows 7 64bit and ArchLinux with newest Catalyst). Before the drivers start up, the output is just fine, no errors.
I would really really appreciate any help, I don't want to return the second card too, telling the reseller again that DP is broken on that card.
Thanks a lot in advance!
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