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Date:      Tue, 07 Apr 2026 11:21:45 +0000
From:      bugzilla-noreply@freebsd.org
To:        ports-bugs@FreeBSD.org
Subject:   [Bug 291239] Kernel panic when running most wayland WMs (nvidia)
Message-ID:  <bug-291239-7788-fDH4AjOmZl@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-291239-7788@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=291239

Adriaan de Groot <adridg@freebsd.org> changed:

           What    |Removed                     |Added
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                 CC|                            |adridg@freebsd.org

--- Comment #5 from Adriaan de Groot <adridg@freebsd.org> ---
I can confirm this on FreeBSD 15-STABLE, stable/15-n282761-3d85a2a7a8a9, with
self-compiled nvidia ports:


nvidia-driver-580-580.142      NVIDIA graphics driver userland
nvidia-drm-66-kmod-580-580.142.1500507 NVIDIA DRM Kernel Module
nvidia-drm-kmod-580-580.142    NVIDIA DRM kernel module
nvidia-kmod-580-580.142.1500507 NVIDIA graphics driver kernel module

The kernel modules are loaded:

 5    1 0xffffffff8376c000    14a88 nvidia-drm.ko
11    2 0xffffffff83a00000  606b378 nvidia.ko
15    1 0xffffffff83867000   1662f8 nvidia-modeset.ko

My graphics card is an older GTX 950 (no longer supported after nvidia drivers
version 580):

vgapci0@pci0:43:0:0:    class=0x030000 rev=0xa1 hdr=0x00 vendor=0x10de
device=0x1402 subvendor=0x1462 subdevice=0x3208
    vendor     = 'NVIDIA Corporation'
    device     = 'GM206 [GeForce GTX 950]'
    class      = display
    subclass   = VGA

Relevant settings in /etc (I have no EnableGpuFirmware setting at all):

kld_list="vboxdrv nvidia-drm"
hw.nvidiadrm.modeset=1


Starting KDE Plasma 6 from the text console after logging in:
- as X11 environment, with `startx` works fine
- as Wayland, after a few layers to `/usr/local/bin/startplasma-wayland`,
panics

The panic looks to me just like the one in this PR, but I'd be happy to dig
deeper. Swapping out the nvidia card for an AMD card gets me a working KDE
Plasma 6 Wayland session.

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