graphics on amd radeon vega

[Michael Schuster]

On Wed, Dec 30, 2020 at 2:01 PM Vasily Postnicov <shamaz.mazum at gmail.com>
wrote:

> Does sysctl -a | grep exp_hw_support show anything?
>

indeed it does:
$ sysctl -a | grep exp_hw_support
hw.amdgpu.exp_hw_support: 0
compat.linuxkpi.amdgpu_exp_hw_support: 0
$

> Usual way to tweak kernel parameters is via sysctl.
>

from looking at other settings, I would guess I need to put this in
/boot/loader.conf to make this persistent across reboot ... correct?
(again, sorry if that's an FAQ - feel free to point me to documentation
about this)

> But this is linux stuff so it can be anything else.
>
> If sysctl does not help, you can recompile the whole driver changing
> int amdgpu_exp_hw_support = 0;
> to
> int amdgpu_exp_hw_support = 1;
> in drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
>

I already found that, though I wanted to keep that as a very last resort :-)

thx
Michael

>
> ср, 30 дек. 2020 г., 15:17 Michael Schuster <michaelsprivate at gmail.com>:
>
>> On Tue, Dec 29, 2020 at 3:35 PM Oskar Sharipov <oskarsh at riseup.net>
>> wrote:
>>
>> > On Tue, Dec 29, 2020 at 05:04:38PM +0300, Vasily Postnicov wrote:
>> > > 13-CURRENT supports that chip. See
>> > >
>> >
>> https://github.com/freebsd/drm-kmod/blob/drm_v5.4.62_4/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
>> > >
>> > > > {0x1002, 0x15d8, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
>> CHIP_RAVEN|AMD_IS_APU}
>> >
>> > Oh, wow. Then I will consider could I try CURRENT now or wait
>> > until it released. Thank you!
>> >
>>
>> when I Install this version on current as of today, I see this in
>> /var/log/messages:
>>
>> Dec 30 13:11:56 hbeast kernel: [drm] amdgpu kernel modesetting enabled.
>> Dec 30 13:11:56 hbeast kernel: drmn0: <drmn> on vgapci0
>> Dec 30 13:11:56 hbeast kernel: [drm] This hardware requires experimental
>> hardware support.
>> Dec 30 13:11:56 hbeast kernel: See modparam exp_hw_support
>> Dec 30 13:11:56 hbeast kernel: device_attach: drmn0 attach returned 19
>> sorry if this is an FAQ, but I couldn't find an answer: how do I
>> enable/modify "modparam exp_hw_support"?
>>
>> thx
>> Michael
>>
>> --
>> Michael Schuster
>> http://recursiveramblings.wordpress.com/
>> recursion, n: see 'recursion'
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>

-- 
Michael Schuster
http://recursiveramblings.wordpress.com/
recursion, n: see 'recursion'