graphics on amd radeon vega

[Michael Schuster]

On Wed, Dec 30, 2020 at 2:54 PM Vasily Postnicov <shamaz.mazum at gmail.com>
wrote:

> Cannot say for sure where you need to place that. Its either
> /boot/loader.conf or /etc/sysctl.conf
>
> The second sets sysctls later in the boot process. And it can not set
> tunables, of course.
>
> I suggest you figure it yourself)
>

will do, many thanks!
Michael

>
> ср, 30 дек. 2020 г., 16:25 Michael Schuster <michaelsprivate at gmail.com>:
>
>>
>>
>> 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'
>>
>

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