Re: Using RX460 (2nd graphics) instead of R7 (1st graphics)

[吴锴]

it depends on which graphic card would be chosen as the /dev/dri/card1 device while system booting and these is no soft switch yet.

sometimes exchange the PCIE slot in mainboard of two cards will do the trick. 

在 2018年12月7日星期五 UTC+8下午6:18:24，not actual earth写道：

Hi everyone,

Fisrst, I have laptop with dual graphics (R7 and RX460) without any option to disable R7 in BIOS.

Is possible for android to use only RX460 instead of R7? Because when using R7, some 3d game very laggy.

Thanks before,

Sorry for my bad english, any suggestion will be appreciated. 

[吴锴]

my mistake , card0 actually

在 2018年12月7日星期五 UTC+8下午8:58:35，吴锴写道：

[not actual earth]

sadly, this is laptop. I can't do anything..

[Mitchel Stewart]

I dont know if this will work, but you can try to use the info here to disable the display note, make sure you use the ":d" on the display you wish to disable. Wish you luck

 https://groups.google.com/forum/#!topic/android-x86/jSF3RnADnqA

[not actual earth]

Already tried this, and not work :(

[Mauro Rossi]

On Saturday, December 8, 2018 at 6:37:30 AM UTC+1, not actual earth wrote:

Already tried this, and not work :(

It all depends on the drm card nodes

/dev/dri/card0 is used by gralloc implementation, but you would want to use /dev/dri/card1,

or have just one /dev/dri/card0 

Since RX460 is not a CIK part you could try to add this to boot cmdline:

radeon.cik_support=0 amdgpu.cik_support=0

[not actual earth]

Already tried, but still same, no changes.

[Mauro Rossi]

Hi,

On Saturday, December 8, 2018 at 4:25:11 PM UTC+1, not actual earth wrote:

Already tried, but still same, no changes.

Then it is confirmed that the current stack does not support multiple GPUs unless you can blacklist them

If they cannot be blacklisted/disabled in kernel or switched,

I honestly do not know what to do about it

Mauro

[not actual earth]

Look like when I try to boot with 4.9 kernel, the 2nd VGA just detected (see log.txt from Bliss), but I got display glitch when I use it.

[not actual earth]

Here is the log.txt from Bliss-x86_64 that has display glitch bug, and second log.txt are from PhoenixOS-x86_64 that successfully boot.

[not actual earth]

Today I try PrimeOS 0.3.1 with 4.9.142 kernel, and my RX460 detected :D, but still got display glitch.. :(