<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_RESOLVED bz_closed" title="RESOLVED INVALID - radeonsi & glamor: No acceleration" href="https://bugs.freedesktop.org/show_bug.cgi?id=59703#c12">Comment # 12</a> on <a class="bz_bug_link bz_status_RESOLVED bz_closed" title="RESOLVED INVALID - radeonsi & glamor: No acceleration" href="https://bugs.freedesktop.org/show_bug.cgi?id=59703">bug 59703</a> from <a class="email" href="mailto:agd5f@yahoo.com" title="Alex Deucher <agd5f@yahoo.com>"> Alex Deucher</a> <pre>(In reply to <a href="show_bug.cgi?id=59703#c8">comment #8</a>) > > 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.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>