| Summary: | Screen flashing and dmesg flooded with *ERROR* [CONNECTOR:65:eDP-1] Link Training failed at link rate = 270000, lane count = 2 when psr enabled | ||||||||||||||||
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| Product: | DRI | Reporter: | kitestramuort | ||||||||||||||
| Component: | DRM/Intel | Assignee: | Intel GFX Bugs mailing list <intel-gfx-bugs> | ||||||||||||||
| Status: | RESOLVED MOVED | QA Contact: | Intel GFX Bugs mailing list <intel-gfx-bugs> | ||||||||||||||
| Severity: | enhancement | ||||||||||||||||
| Priority: | low | CC: | dhinakaran.pandiyan, intel-gfx-bugs, jose.souza | ||||||||||||||
| Version: | unspecified | ||||||||||||||||
| Hardware: | x86-64 (AMD64) | ||||||||||||||||
| OS: | Linux (All) | ||||||||||||||||
| Whiteboard: | Triaged, ReadyForDev | ||||||||||||||||
| i915 platform: | BDW | i915 features: | display/backlight, display/eDP, display/PSR, power/runtime PM, power/suspend-resume | ||||||||||||||
| Attachments: |
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Created attachment 141930 [details]
dmesg log
PSR on BDW isn't supported currently. But, here's something you can try on top of drm-tip (https://cgit.freedesktop.org/drm-tip) https://patchwork.freedesktop.org/series/50654/ As documentation for future BDW enablement, it'd be great if you also attach the output of edid-decode /sys/class/drm/card0-eDP-1/edid and /sys/kernel/debug/dri/0/i915_edp_psr_status -DK Created attachment 141941 [details]
screen edid
Created attachment 141942 [details]
psr-status
With drm-tip and your patches the errors are gone, but the flashing still occurs albeit very occasionally. I guess PSR is still inactive on Broadwell though. Do you know if this platform is supposed to reach PC10? All I could get to is PC7, maybe due to lack of PSR support? Hi Could you attach dmesg logs when running with the drm-tip & patches? Please don't forget to increase the log level(drm.debug=0x1e). Thanks Created attachment 141964 [details]
dmesg log (drm-tip + patches)
There is a lot of short pulses from your eDP but no PSR or other errors detected. Before you dump this log did you got any flashing? no flashing before this dump. There is some flashing after the first time the display comes back from blanking for inactivity. I'll try and capture a new dmesg when flashing occurs So, this time the screen didn't come back from blanking. I had to force reboot. journalctl -b -1 attached. There's an *ERROR* [CRTC:39:pipe A] flip_done timed out Created attachment 141965 [details]
log of screen locking after blanking
The problem is '*ERROR* [CRTC:39:pipe A] flip_done timed out' but there is no clue of what caused that in your logs. Try to reproduce with this kernel parameters: drm.debug=0x1e log_buf_len=4M Hum this may not be 100% related to PSR and there is reports of flip_done timeout with PSR disabled too in BDW: https://bugs.freedesktop.org/show_bug.cgi?id=107732 You are reporter of the issue currently having low priority. Do you still see issue. If so, please spesify clearly what is impact to you. -- GitLab Migration Automatic Message -- This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity. You can subscribe and participate further through the new bug through this link to our GitLab instance: https://gitlab.freedesktop.org/drm/intel/issues/170. |
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Created attachment 141929 [details] dmesg output If I enable psr with i915.enable_psr=1 the syslog is flooded by the message below and the screen blanks intermittently for a second or so. *ERROR* [CONNECTOR:65:eDP-1] Link Training failed at link rate = 270000, lane count = 2 No such message is logged when psr is disabled and no flashing occurs. This is on a Thinkpad T450s, Core i5-5300U, kernel 4.19.0-rc6, Arch Linux.