Created attachment 145788 [details]
journalctl -b (boot log, drm.debug=0x1e log_buf_len=1)
OS: Arch linux
After update to 5.3.x kernel external monitor on VGA port not working
[drm:hsw_fdi_link_train [i915]] *ERROR* FDI link training failed!
[drm:intel_set_pch_fifo_underrun_reporting [i915]] *ERROR* uncleared pch fifo underrun on pch transcoder A
[drm:cpt_irq_handler [i915]] *ERROR* PCH transcoder A FIFO underrun
Arch linux thread
Created attachment 145792 [details] [review]
[PATCH] drm/i915: Fix PCH reference clock for FDI on HSW/BDW
Please test whether this fixes it.
Yes, that's it. This fixed problem.
(In reply to Andrija from comment #3)
> Yes, that's it. This fixed problem.
Cool. Keeping the bug open until the fix lands in our tree.
Author: Ville Syrjälä <firstname.lastname@example.org>
Date: Tue Oct 22 21:56:43 2019 +0300
drm/i915: Fix PCH reference clock for FDI on HSW/BDW
Thanks for the bug report and testing.
Do you know in which linux version this patch will be apllied?
(In reply to Andrija from comment #6)
> Do you know in which linux version this patch will be apllied?
Drm-tip (https://cgit.freedesktop.org/drm-tip) will have the latest changes.
Jani, we are now at 5.4rc6 so I suppose we missed 5.5 and goes to 5.6? Or how this goes?