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FreeBSDDesktop / kms-drm

the DRM part of the linuxkpi-based KMS
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Virtual console does not redraw #151

Open johalun opened 5 years ago

johalun commented 5 years ago

Typed characters does not show up on screen until one switch VT back and forth ones. Only occurs on rare hardware or on rare occasion..

valpackett commented 5 years ago

When? If it's after switching from a graphical display server, it might be just the vt being left in the mode that doesn't echo..

johalun commented 5 years ago

Apparently the only variable is drm-v4.16 (OK) vs drm-v5.0 (has this bug). I suspect the drm fb helper.

johalun commented 5 years ago

This happens before even starting X, when loading drm driver at virtual console.

valpackett commented 5 years ago

I have a Kaby Lake device now, am seeing this. Switching to a new vt does redraw the screen..

valpackett commented 5 years ago

Interesting: looks like this maybe does not happen with fastboot enabled? (need to retest, I'm actually not sure)

(But fastboot breaks backlight on my new laptop (on Linux too, it's a known thing) haha)

and sometimes quitting from a GUI display server restores refresh too

javashin commented 5 years ago

fastboot is fixed on 5.2.X the backlight issue

javashin commented 5 years ago

also mpv cant play any video on the KMS Drm console its useless too slow , maybe is this related ?

valpackett commented 5 years ago

no, this is about vt (virtual terminal), userspace applications that use DRM are fine

javashin commented 5 years ago

yes on Vt kms drm >> after load kldload i915kms and use on the same console tty vt no X > mpv -vo=drm foo.mp4 = very slow reproduction of video media , too slow means unusable. unwatchable

wulf7 commented 4 years ago

Setting compat.linuxkpi.i915_enable_psr boot loader parameter to 0 workarounds at least "VT redraw" issue to me. fastboot does not work with suspend/resume on my laptop. P.S. 'does not work' means VT redraw is stopped after wakeup