very slow - WCPU

Pete Wright pete at
Thu Jun 18 23:54:54 UTC 2020

On 6/18/20 2:45 PM, ajtiM via freebsd-questions wrote:
> On Wed, 17 Jun 2020 17:19:51 -0700
> Pete Wright <pete at> wrote:
>> On 6/17/20 4:44 PM, ajtiM via freebsd-questions wrote:
>>> Hi!
>>> For whatever reason after few last updates I cannot use FreeCAD
>>> (WCPU 99,7%), Cura (3D printing) - WCPU time is good for
>>> cura-engine but Python 3.7 is 100.22% and Blender stop working
>>> because "Error! Unsupported graphics card or driver. A graphics
>>> card and driver with support for OpenGL 3.3 or higher is required.
>>> The program will now close."
>> Can you provide information on which graphics card you are using, and
>> if you have installed/configured the appropriate drivers?  That will
>> most likely help people here better answer you question.
>> cheers,
>> -pete
> I am sorry:
> vgapci0 at pci0:1:0:0:	class=0x030000 card=0x00b5106b
> chip=0x944a1002 rev=0x00 hdr=0x00 vendor     = 'Advanced Micro Devices,
> Inc. [AMD/ATI]' device     = 'RV770/M98L [Mobility Radeon HD 4850]'
>      class      = display
>      subclass   = VGA
> hdac0 at pci0:1:0:1:	class=0x040300 card=0xaa30106b chip=0xaa301002
> rev=0x00 hdr=0x00 vendor     = 'Advanced Micro Devices, Inc. [AMD/ATI]'
>      device     = 'RV770 HDMI Audio [Radeon HD 4850/4870]'
>      class      = multimedia
>      subclass   = HDA
> I have installed FreeBSD (just FreeBSD) on iMac 11,1 and tha last when
> I used KMS drivers was FreeBSD 11.1 after that just black screen.
> And because that I am using scfb driver and I didn't have a problem
> with FreeBSD, Cura nad Blender and stopped as I wrote with the last
> updates.
> Should help if I downgrade qt5-opengl, please?

So the issues you are seeing is because you are using the scfb driver 
which is a software only driver.  So it would be expected to see really 
poor performance of 3d applications, as well as others which require 
hardware acceleration failing to start.

i am not sure about the status of DRM on apple hardware but there might 
be someone on this or the freebsd-x11@ list who can let you know if 
hardware acceleration is supported.


Pete Wright
pete at

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