[Bug 108462] two external screens permanently go blank on HP EliteBook Folio G1

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=108462

--- Comment #64 from Johannes Berg <johannes at sipsolutions.net> ---
I'm almost done doing a long and tiring config bisect now, using Steven's
awesome script tools/testing/ktest/config-bisect.pl ...

But one thing I just noticed, on the drm-tip kernel I got this WARN_ON a lot?

[  289.339478] WARNING: CPU: 2 PID: 2200 at
drivers/gpu/drm/i915/intel_pm.c:4395 skl_allocate_pipe_ddb+0xa2f/0xb60 [i915]
[  289.339481] ---[ end trace f63ed9bc71cfc7ae ]---
[  289.339496] ------------[ cut here ]------------
[  289.339498] WARN_ON(wm->wm[level].min_ddb_alloc > total[PLANE_CURSOR])


it's possible, however, that this occurred because I set the watermark levels
as per a comment above...

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