From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugzilla-daemon@freedesktop.org
Subject: [Bug 73530] Asus U38N: Black screen with Radeon driver in Linux
Date: Thu, 14 May 2015 18:34:33 +0000
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Date: Thu, 14 May 2015 18:34:33 +0000
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https://bugs.freedesktop.org/show_bug.cgi?id=73530
--- Comment #94 from Nicolas Werner ---
(In reply to Alex Deucher from comment #93)
> Created attachment 115778 [details] [review]
> debuging patch
>
> Your dpcd is indeed getting corrupted somehow. I can't see how though. The
> attached patch (please drop your hardcode to 2 patch when you apply this
> one) should workaround the issue by re-fetching the dpcd when required, but
> doesn't fix the root cause. Please attach the dmesg output with this patch
> applied as well. I'd like to see how often it's getting corrupted.
Interestingly this doesn't work, I get the same blackscreen as usually:
[ 5.946595] [drm] radeon_dp_getdpcd
[ 5.946601] [drm] DPCD: 11 0a 84 01 00 0b 01 01 02 00 00 00 00 00 00
[ 5.978557] [drm] fb mappable at 0xD047B000
[ 5.978563] [drm] vram apper at 0xD0000000
[ 5.978565] [drm] size 8294400
[ 5.978567] [drm] fb depth is 24
[ 5.978569] [drm] pitch is 7680
[ 5.978789] fbcon: radeondrmfb (fb0) is primary device
[ 5.978881] [drm:radeon_dp_set_link_config] *ERROR* corrupt dpcd, updating
[ 5.979556] [drm] radeon_dp_set_link_config, 540000, 1
[ 5.979558] [drm] DPCD: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 7.118887] [drm] radeon_dp_set_rx_power_state, 0
[ 7.118889] [drm] DPCD: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 7.118891] [drm:radeon_dp_set_rx_power_state] *ERROR* corrupt dpcd,
updating
[ 8.254349] [drm:radeon_dp_link_train] *ERROR* corrupt dpcd, updating
[ 8.255018] [drm] radeon_dp_link_train
[ 8.255019] [drm] DPCD: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 8.255020] [drm] dp_info dpcd: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 8.255022] [drm] radeon_dp_set_rx_power_state, 0
[ 8.255023] [drm] DPCD: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 8.255024] [drm:radeon_dp_set_rx_power_state] *ERROR* corrupt dpcd,
updating
[ 8.255326] [drm] radeon_dp_getdpcd
[ 8.255326] [drm] DPCD: 11 0a 02 00 00 00 00 00 00 00 00 00 00 00 00
[ 8.263438] [drm:radeon_dp_link_train_cr] *ERROR* clock recovery tried 5
times
[ 8.263440] [drm:radeon_dp_link_train_cr] *ERROR* clock recovery failed
[ 8.662772] radeon 0000:00:01.0: fb0: radeondrmfb frame buffer device
[ 8.691450] [drm] Initialized radeon 2.40.0 20080528 for 0000:00:01.0 on
minor 0
[ 11.436860] [drm] radeon_dp_getdpcd
[ 11.436866] [drm] DPCD: 11 0a 84 01 00 0b 01 01 02 00 00 00 00 00 00
[ 11.467143] [drm] radeon_dp_getdpcd
[ 11.467151] [drm] DPCD: 11 0a 84 01 00 0b 01 01 02 00 00 00 00 00 00
[ 11.530015] [drm] radeon_dp_getdpcd
[ 11.530021] [drm] DPCD: 11 0a 84 01 00 0b 01 01 02 00 00 00 00 00 00
[ 11.558174] [drm] radeon_dp_getdpcd
[ 11.558182] [drm] DPCD: 11 0a 84 01 00 0b 01 01 02 00 00 00 00 00 00
--
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You are the assignee for the bug.
--1431628473.115a1.18565
Date: Thu, 14 May 2015 18:34:33 +0000
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Comment # 94
on bug 73530
from Nicolas Werner
(In reply to Alex Deucher from comment #93)
> Created attachment 115778 [details] [review] [review]
> debuging patch
>
> Your dpcd is indeed getting corrupted somehow. I can't see how though. The
> attached patch (please drop your hardcode to 2 patch when you apply this
> one) should workaround the issue by re-fetching the dpcd when required, but
> doesn't fix the root cause. Please attach the dmesg output with this patch
> applied as well. I'd like to see how often it's getting corrupted.
Interestingly this doesn't work, I get the same blackscreen as usually:
[ 5.946595] [drm] radeon_dp_getdpcd
[ 5.946601] [drm] DPCD: 11 0a 84 01 00 0b 01 01 02 00 00 00 00 00 00
[ 5.978557] [drm] fb mappable at 0xD047B000
[ 5.978563] [drm] vram apper at 0xD0000000
[ 5.978565] [drm] size 8294400
[ 5.978567] [drm] fb depth is 24
[ 5.978569] [drm] pitch is 7680
[ 5.978789] fbcon: radeondrmfb (fb0) is primary device
[ 5.978881] [drm:radeon_dp_set_link_config] *ERROR* corrupt dpcd, updating
[ 5.979556] [drm] radeon_dp_set_link_config, 540000, 1
[ 5.979558] [drm] DPCD: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 7.118887] [drm] radeon_dp_set_rx_power_state, 0
[ 7.118889] [drm] DPCD: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 7.118891] [drm:radeon_dp_set_rx_power_state] *ERROR* corrupt dpcd,
updating
[ 8.254349] [drm:radeon_dp_link_train] *ERROR* corrupt dpcd, updating
[ 8.255018] [drm] radeon_dp_link_train
[ 8.255019] [drm] DPCD: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 8.255020] [drm] dp_info dpcd: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 8.255022] [drm] radeon_dp_set_rx_power_state, 0
[ 8.255023] [drm] DPCD: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 8.255024] [drm:radeon_dp_set_rx_power_state] *ERROR* corrupt dpcd,
updating
[ 8.255326] [drm] radeon_dp_getdpcd
[ 8.255326] [drm] DPCD: 11 0a 02 00 00 00 00 00 00 00 00 00 00 00 00
[ 8.263438] [drm:radeon_dp_link_train_cr] *ERROR* clock recovery tried 5
times
[ 8.263440] [drm:radeon_dp_link_train_cr] *ERROR* clock recovery failed
[ 8.662772] radeon 0000:00:01.0: fb0: radeondrmfb frame buffer device
[ 8.691450] [drm] Initialized radeon 2.40.0 20080528 for 0000:00:01.0 on
minor 0
[ 11.436860] [drm] radeon_dp_getdpcd
[ 11.436866] [drm] DPCD: 11 0a 84 01 00 0b 01 01 02 00 00 00 00 00 00
[ 11.467143] [drm] radeon_dp_getdpcd
[ 11.467151] [drm] DPCD: 11 0a 84 01 00 0b 01 01 02 00 00 00 00 00 00
[ 11.530015] [drm] radeon_dp_getdpcd
[ 11.530021] [drm] DPCD: 11 0a 84 01 00 0b 01 01 02 00 00 00 00 00 00
[ 11.558174] [drm] radeon_dp_getdpcd
[ 11.558182] [drm] DPCD: 11 0a 84 01 00 0b 01 01 02 00 00 00 00 00 00
You are receiving this mail because:
- You are the assignee for the bug.
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