https://bugzilla.kernel.org/show_bug.cgi?id=102811

Bug ID: 102811 Summary: [BISECTED] [radeon] Monitor loses HDMI video signal - blank screen after boot Product: Drivers Version: 2.5 Kernel Version: 4.1 Hardware: x86-64 OS: Linux Tree: Mainline Status: NEW Severity: high Priority: P1 Component: Video(DRI - non Intel) Assignee: drivers_video-dri@kernel-bugs.osdl.org Reporter: sweeneygj@gmx.com Regression: No

Created attachment 184821 --> https://bugzilla.kernel.org/attachment.cgi?id=184821&action=edit bisect log to locate problem patch

M/B: MA488TD-M EVO Monitor: Hanns-G HS241HPBEEW01

Monitor connected via HDMI only.

In 4.1 boot up progresses until display manager login at which point the monitor loses signal - 'No Signal Input. Check Video cable'.

4.0.9 works fine.

Bisect log attached.

Good boot finds HDMI connector:

Aug 13 09:20:10 gaia kernel: [ 4.959062] [drm] Radeon Display Connectors Aug 13 09:20:10 gaia kernel: [ 4.959066] [drm] Connector 0: Aug 13 09:20:10 gaia kernel: [ 4.959067] [drm] VGA-1 Aug 13 09:20:10 gaia kernel: [ 4.959069] [drm] DDC: 0x7e40 0x7e40 0x7e44 0x7e44 0x7e48 0x7e48 0x7e4c 0x7e4c Aug 13 09:20:10 gaia kernel: [ 4.959070] [drm] Encoders: Aug 13 09:20:10 gaia kernel: [ 4.959071] [drm] CRT1: INTERNAL_KLDSCP_DAC1 Aug 13 09:20:10 gaia kernel: [ 4.959072] [drm] Connector 1: Aug 13 09:20:10 gaia kernel: [ 4.959073] [drm] HDMI-A-1 Aug 13 09:20:10 gaia kernel: [ 4.959074] [drm] HPD3 Aug 13 09:20:10 gaia kernel: [ 4.959076] [drm] DDC: 0x7e50 0x7e50 0x7e54 0x7e54 0x7e58 0x7e58 0x7e5c 0x7e5c Aug 13 09:20:10 gaia kernel: [ 4.959077] [drm] Encoders: Aug 13 09:20:10 gaia kernel: [ 4.959078] [drm] DFP3: INTERNAL_KLDSCP_LVTMA Aug 13 09:20:10 gaia kernel: [ 5.038659] [drm] fb mappable at 0xD0359000 Aug 13 09:20:10 gaia kernel: [ 5.038661] [drm] vram apper at 0xD0000000 Aug 13 09:20:10 gaia kernel: [ 5.038662] [drm] size 8294400 Aug 13 09:20:10 gaia kernel: [ 5.038663] [drm] fb depth is 24 Aug 13 09:20:10 gaia kernel: [ 5.038664] [drm] pitch is 7680

Bad boot finds DVI-D connector:

Aug 12 22:10:53 gaia kernel: [ 5.107030] [drm] Radeon Display Connectors Aug 12 22:10:53 gaia kernel: [ 5.107034] [drm] Connector 0: Aug 12 22:10:53 gaia kernel: [ 5.107035] [drm] VGA-1 Aug 12 22:10:53 gaia kernel: [ 5.107037] [drm] DDC: 0x7e40 0x7e40 0x7e44 0x7e44 0x7e48 0x7e48 0x7e4c 0x7e4c Aug 12 22:10:53 gaia kernel: [ 5.107038] [drm] Encoders: Aug 12 22:10:53 gaia kernel: [ 5.107040] [drm] CRT1: INTERNAL_KLDSCP_DAC1 Aug 12 22:10:53 gaia kernel: [ 5.107041] [drm] Connector 1: Aug 12 22:10:53 gaia kernel: [ 5.107042] [drm] DVI-D-1 Aug 12 22:10:53 gaia kernel: [ 5.107043] [drm] HPD1 Aug 12 22:10:53 gaia kernel: [ 5.107045] [drm] DDC: 0x7e50 0x7e50 0x7e54 0x7e54 0x7e58 0x7e58 0x7e5c 0x7e5c Aug 12 22:10:53 gaia kernel: [ 5.107046] [drm] Encoders: Aug 12 22:10:53 gaia kernel: [ 5.107047] [drm] DFP3: INTERNAL_KLDSCP_LVTMA Aug 12 22:10:53 gaia kernel: [ 5.186593] [drm] fb mappable at 0xD0359000 Aug 12 22:10:53 gaia kernel: [ 5.186595] [drm] vram apper at 0xD0000000 Aug 12 22:10:53 gaia kernel: [ 5.186596] [drm] size 8294400 Aug 12 22:10:53 gaia kernel: [ 5.186597] [drm] fb depth is 24 Aug 12 22:10:53 gaia kernel: [ 5.186598] [drm] pitch is 7680