<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - WQHD Displayport only 27 Hz" href="https://bugs.freedesktop.org/show_bug.cgi?id=93343#c8">Comment # 8</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - WQHD Displayport only 27 Hz" href="https://bugs.freedesktop.org/show_bug.cgi?id=93343">bug 93343</a> from <a class="email" href="mailto:snoover@gmail.com" title="Pierre Stander <snoover@gmail.com>"> Pierre Stander</a> <pre>Hello, I would like to also confirm this bug, with some extra information. The problem was resolved (for me) by booting with the kernel command line parameter radeon.audio=0. I have a muti-boot system: a) booting: Win10/ Ubuntu14.04-LTS/ Ubuntu16.04-LTS. b) Cypress PRO [Radeon HD 5850] in crossfire, both are identical XFX cards. c) DELL U2515H (Native 2560x144) connect via DisplayPort The problem only manifests under Ubuntu16.04-LTS, other OS boots work correctly. Ubuntu 14.04 info: Kernel: 3.13.0-86-generic Radeon Driver: [drm] Initialized radeon 2.36.0 20080528 Ubuntu 16.04 info: Kernel: 4.4.0-34-generic Radeon Driver: [drm] Initialized radeon 2.43.0 20080528 Kind Regards Pierre</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>