[drm] Got stolen memory base 0x8a800000, size 0x2000000

[Steven Friedrich]

How can I fix or avoid this?

I do see some odd graphic corruption overlayed on my consoles.

What will I lose if I turn DRM off by not using :
drm-fbsd12.0-kmod-4.16.g20201016_1 DRM modules for the linuxkpi-based KMS
components
drm-kmod-g20190710_1 Metaport of DRM modules for the linuxkpi-based
KMS components
drm_info-2.2.0_1 Small utility to dump info about DRM devices
libdrm-2.4.104,1 Userspace interface to kernel Direct Rendering
Module services
s



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[Pete Wright]

On 2/19/21 2:23 AM, Steven Friedrich wrote:
> How can I fix or avoid this?
>
> I do see some odd graphic corruption overlayed on my consoles.
>
> What will I lose if I turn DRM off by not using :
> drm-fbsd12.0-kmod-4.16.g20201016_1 DRM modules for the linuxkpi-based KMS
> components
> drm-kmod-g20190710_1 Metaport of DRM modules for the linuxkpi-based
> KMS components
> drm_info-2.2.0_1 Small utility to dump info about DRM devices
> libdrm-2.4.104,1 Userspace interface to kernel Direct Rendering
> Module services
> s

You will not have hardware accelerated graphics is using Xorg if the
drm-kmod is not present, which may or may be an issue depending on your
use-case.  It may also effect power management as well, for example on
my laptop if I don't load the kmod for my Nvidia GPU I get much worse
battery life.  So that would be something to look out for.

To help you fix this it would be helpful to provide the following:
1. FreeBSD release (uname -a)
2. Graphics hardware (Intel i915 vs AMD)
3. Additional logging/debugging information.  For example if you can
provide more context of the error in your logs, and if there are repro
steps.

Cheers,
-pete

--
Pete Wright
pe...@nomadlogic.org
@nomadlogicLA

[Steven Friedrich]

Thanks for the reply, Pete.
After I sent that email, I figured out how to make my signature reflect my
uname output.
I have a i7-8700 with integrated UHD-630 graphics.
I have no idea where t look, beyond dmesg, for ,re info regarding this
"stolen" memory. It happens everytime I boot. No logs in /var/log by drm.

root@FreeBSD(pts/1):/var/log # grep -i stolen *
dmesg.today:[drm] Got stolen memory base 0x8a800000, size 0x2000000
dmesg.yesterday:[drm] Got stolen memory base 0x8a800000, size 0x2000000
dmesg.yesterday:[drm] Got stolen memory base 0x8a800000, size 0x2000000
messages:Feb 19 06:00:17 FreeBSD kernel: [drm] Got stolen memory base
0x8a800000, size 0x2000000
messages:Feb 19 05:04:41 FreeBSD kernel: [drm] Got stolen memory base
0x8a800000, size 0x2000000
messages:Feb 19 16:42:41 FreeBSD kernel: [drm] Got stolen memory base
0x8a800000, size 0x2000000
messages:Feb 19 16:59:01 FreeBSD kernel: [drm] Got stolen memory base
0x8a800000, size 0x2000000
messages:Feb 19 18:23:36 FreeBSD kernel: [drm] Got stolen memory base
0x8a800000, size 0x2000000

--
FreeBSD FreeBSD 12.2-RELEASE-p3 FreeBSD 12.2-RELEASE-p3 r369283 Special amd64

[Steven Friedrich]

Here's a better version of the original report:
real memory = 17179869184 (16384 MB)
avail memory = 16294457344 (15539 MB)
unknown: memory range not supported
pci0: <memory, RAM> at device 20.2 (no driver attached)

[drm] Got stolen memory base 0x8a800000, size 0x2000000

Here's the device as reported by pciconf -lv:
none1@pci0:0:20:2: class=0x050000 card=0x72708086 chip=0xa36f8086
rev=0x10 hdr=0x00
vendor = 'Intel Corporation'
device = 'Cannon Lake PCH Shared SRAM'
class = memory
subclass = RAM

After I invoke sddm, and start a plasma5 session, upon exiting sddm, my
consoles have corruption at the top of the screens. It doesn't scrolll off.
Remains until reboot. Another X11 session causes it to recur.

--
FreeBSD FreeBSD 12.2-RELEASE-p3 FreeBSD 12.2-RELEASE-p3 r369283 Special amd64

HP-Slimline 290-p0014 Desktop
Using integrated UHD Graphics 630
Built drm from /usr/ports/drm-kmod