Fenixin OP , 3 hours ago

Thanks for the answer.

Just checked with lspci -v and it says radeon:

<span style="color:#323232;">03:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Cape Verde PRO [Radeon HD 7750/8740 / R7 250E] (prog-if 00 [VGA controller])
</span><span style="color:#323232;">        Subsystem: PC Partner Limited / Sapphire Technology Cape Verde PRO [Radeon HD 7750/8740 / R7 250E]
</span><span style="color:#323232;">        Flags: bus master, fast devsel, latency 0, IRQ 28, NUMA node 0
</span><span style="color:#323232;">        Memory at d0000000 (64-bit, prefetchable) [size=256M]
</span><span style="color:#323232;">        Memory at fbf80000 (64-bit, non-prefetchable) [size=256K]
</span><span style="color:#323232;">        I/O ports at e000 [size=256]
</span><span style="color:#323232;">        Expansion ROM at 000c0000 [disabled] [size=128K]
</span><span style="color:#323232;">        Capabilities: [48] Vendor Specific Information: Len=08 <?>
</span><span style="color:#323232;">        Capabilities: [50] Power Management version 3
</span><span style="color:#323232;">        Capabilities: [58] Express Legacy Endpoint, MSI 00
</span><span style="color:#323232;">        Capabilities: [a0] MSI: Enable+ Count=1/1 Maskable- 64bit+
</span><span style="color:#323232;">        Capabilities: [100] Vendor Specific Information: ID=0001 Rev=1 Len=010 <?>
</span><span style="color:#323232;">        Capabilities: [150] Advanced Error Reporting
</span><span style="color:#323232;">        Capabilities: [270] Secondary PCI Express
</span><span style="color:#323232;">        Kernel driver in use: radeon
</span><span style="color:#323232;">        Kernel modules: radeon, amdgpu
</span>

Is that the one it’s supposed to be active?

About the allocate thing, I think that is a number and not an index in an array. I think that you can allocate as many gpus you want:

https://sh.itjust.works/pictrs/image/7681bc38-2962-45c3-96c5-bdea2fc7ace5.png

I’ve seen that same menu in screenshots and I’m supposed to be able to choose something different from zero.