https://bugs.freedesktop.org/show_bug.cgi?id=106191
Bug ID: 106191 Summary: Failure to recognize DisplayPort signal Product: DRI Version: DRI git Hardware: x86-64 (AMD64) OS: Linux (All) Status: NEW Severity: major Priority: medium Component: DRM/Radeon Assignee: dri-devel@lists.freedesktop.org Reporter: francois.jacques@gmail.com
Created attachment 139004 --> https://bugs.freedesktop.org/attachment.cgi?id=139004&action=edit callstack from DRM/radeon
DRM/radeon fails with in drm_dp_link_rate_to_bw_code
Driver fails to negotiate video resolution with DP-connected monitor, on any of 4 DP ports. Controller can drive monitor at 2048x1080 through HDMI adapter. Straight DP cable only works in console (low-res)
Disconnecting power cable from monitor for 5 minutes trick doesn't help ;)
Video controller: FirePro v8800 ChipID 0x6888 (see hardware.txt for details, 4 DPs) DP monitor: Dell U2717DA Workstation: HP xw8600 Kernel messages with backtrace: see var_log_messages_excerpt.txt Max res supported by monitor: 1440p (see Xorg.0.log)