Bug#944092: linux-image-5.3.0-1-amd64: i915 gpu hang, system freezes for seconds every few minutes

[Philipp Marek <philipp@marek.priv.at>]

With 5.10.0-6-amd64 I don't have this message anymore;
when resuming there's a few seconds wait before the screensaver
login window comes up, and I get these messages in kern.log:

	[145941.159088] i915 0000:00:02.0: [drm] *ERROR* Link Training 
Unsuccessful
	[145941.367056] i915 0000:00:02.0: [drm] *ERROR* Link Training 
Unsuccessful
	[145941.588149] i915 0000:00:02.0: [drm] *ERROR* Link Training 
Unsuccessful
	[145941.806389] i915 0000:00:02.0: [drm] *ERROR* Link Training 
Unsuccessful
	[145941.836878] i915 0000:00:02.0: [drm] *ERROR* CPU pipe B FIFO 
underrun
	[145942.021809] i915 0000:00:02.0: [drm] *ERROR* Link Training 
Unsuccessful
	[145942.236937] i915 0000:00:02.0: [drm] *ERROR* Link Training 
Unsuccessful

Perhaps that's related.