https://bugs.freedesktop.org/show_bug.cgi?id=59703
--- Comment #12 from Alex Deucher <[email protected]> --- (In reply to comment #8) > > DRM/KMS with 2560x1440 monitors on DP->DVI adapters doesn't work correctly. > The monitors were detected with the wrong resolution (1024x768) even after I > hardwired them on the kernel command line with video=DP-1:2560x1440-24@60e > video=DP-2:2560x1440-24@60e. This is material for another bug report. > > However the monitor detection/mode switching code in the Atom BIOS is broken > in general for DP outputs. Not even the BIOS switches modes correctly when > these monitors are connected. I had a long and fruitless exchange with AMD > tech support about this. Now the monitors are still not detected reliably > but switching to a text console and back gets them all up after a couple of > tries. What kind of DP->DVI adapters are you using? Make sure they are active adapters that support dual link since your monitors require dual-link DVI and passive DP->DVI adapters only support single link. Also, most active adapters also only support single link DVI; you need to make sure you specifically got dual-link capable active adapters. If they are active adapters, make sure they are properly powered. You might also want to try alternate adapters as a lot of cheap ones don't work very well. -- You are receiving this mail because: You are the assignee for the bug.
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