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Date:      Sat, 8 Aug 2020 14:56:54 +0200
From:      Thomas Zander <thomas.e.zander@googlemail.com>
To:        Niclas Zeising <zeising+freebsd@daemonic.se>
Cc:        Nils Johannsen <NilsJohannsen@gmx.de>, freebsd-stable@freebsd.org
Subject:   Re: drm i915kms on 12.1-STABLE (r363237)
Message-ID:  <CAFU734w_mpRv8TQug5ULtn9hjjYUkzEAh6tzyrxQ24EfxfRshQ@mail.gmail.com>
In-Reply-To: <9ee4b0b9-50bf-c7cb-9581-bf8b5374a718@daemonic.se>
References:  <trinity-791e2a27-1366-4a54-8299-7a37177ad755-1594979358043@3c-app-gmx-bs05> <9ee4b0b9-50bf-c7cb-9581-bf8b5374a718@daemonic.se>

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On Tue, 21 Jul 2020 at 12:53, Niclas Zeising
<zeising+freebsd@daemonic.se> wrote:

> On 2020-07-17 11:49, Nils Johannsen wrote:
>
> > yesterday I installed 12.1-STABLE [1] with kernel version `uname -K` 1201519 on my ThinkPad E490 with 'Intel UHD Graphics 620' [2].
> > But if I install the 'drm-fbsd12.0-kmod' and load the driver `kldload /boot/modules/i915kms.ko` it will only show a black screen until I manually poweroff the notebook.
> > See the `/var/log/messages` [3] below. The 'drm-fbsd12.0-kmod' from pkg [4] behaves the sames as if I build it manually from ports. On 12.1-RELEASE it worked just fine.
>
> You need to upgrade to 13-CURRENT and use drm-devel-kmod.

I don't think this is the root cause. I am seeing the exact same issue
after upgrading a Sandy Bridge machine with on-chip-GPU to a recent
-STABLE. Worked perfectly fine before with the abandonware-i915kms in
base as well as with drm-legacy-kmod. Now both are showing a mere
black screen, just like Nils reported. Maybe the recent MFCs of
linuxkpi stuff broke something. I'll build some kernels and modules
and see if I find the issue. Meanwhile, if it's been discovered (and
fixed) already, let me know.

Riggs



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