<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - [SKL] 5k tiled display issues (dual DP)" href="https://bugs.freedesktop.org/show_bug.cgi?id=95207#c20">Comment # 20</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - [SKL] 5k tiled display issues (dual DP)" href="https://bugs.freedesktop.org/show_bug.cgi?id=95207">bug 95207</a> from <a class="email" href="mailto:bugs@bzatek.net" title="Tomas Bzatek <bugs@bzatek.net>"> Tomas Bzatek</a> <pre>I have a AMD FirePro W2100 here for testing. Using radeon drm driver results in EXACTLY the same kind of image corruption as with i915. Modelines are detected properly with the drm-displayid-timings branch. However, proprietary fglrx driver works nicely (being just utterly slow in 2D). Modelines reported by fglrx are basically equal to my previous findings. Xorg.log attached for inspiration. So what are we missing? Is the panel expecting perfectly synchronized both outputs? (meaning the particular frame data being sent at the exact moment on both outputs) Is there a driver option to force that? Is it some extra flag in the DP protocol? Anything else to try?</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> <li>You are on the CC list for the bug.</li> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>