https://bugzilla.kernel.org/show_bug.cgi?id=100871 Bug ID: 100871 Summary: radeon fails to initialize one DisplayPort monitor Product: Drivers Version: 2.5 Kernel Version: v3.19-7478-g796e1c55717e Hardware: All OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: Video(DRI - non Intel) Assignee: drivers_video-dri@xxxxxxxxxxxxxxxxxxxx Reporter: cra@xxxxxxx Regression: No Ever since Fedora 21 was updated to kernel-4.x, the radeon drm driver fails to initialize one DisplayPort monitor of a multi-monitor setup. Setup is four mini-DP ports on [AMD/ATI] Cedar GL [FirePro 2460], two Dell U2410 monitors connected via DP, and two Dell 2001FP monitors connected via DVI using DP-to-DVI adapters. 01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Cedar GL [FirePro 2460] (prog-if 00 [VGA controller]) Subsystem: Advanced Micro Devices, Inc. [AMD/ATI] Device 2002 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+ Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0, Cache Line Size: 64 bytes Interrupt: pin A routed to IRQ 29 Region 0: Memory at e0000000 (64-bit, prefetchable) [size=256M] Region 2: Memory at f7e20000 (64-bit, non-prefetchable) [size=128K] Region 4: I/O ports at e000 [size=256] Expansion ROM at f7e00000 [disabled] [size=128K] Capabilities: <access denied> Kernel driver in use: radeon Kernel modules: radeon I did a git bisect between Linux v3.19-6676-g1fa185ebcbce and v3.19-7478-g796e1c55717e and found: # bad: [e55bca26188e45f209597abf986c87cc5a49894a] radeon/audio: enable DP audio git bisect bad e55bca26188e45f209597abf986c87cc5a49894a # first bad commit: [e55bca26188e45f209597abf986c87cc5a49894a] radeon/audio: enable DP audio commit e55bca26188e45f209597abf986c87cc5a49894a Author: Slava Grigorev <slava.grigorev@xxxxxxx> Date: Fri Dec 12 17:01:42 2014 -0500 radeon/audio: enable DP audio Reviewed-by: Christian König <christian.koenig@xxxxxxx> Signed-off-by: Slava Grigorev <slava.grigorev@xxxxxxx> Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx> See also https://bugzilla.redhat.com/show_bug.cgi?id=1232562 -- You are receiving this mail because: You are watching the assignee of the bug. _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel