On Wed, Nov 9, 2022 at 6:09 PM Patrick O'Callaghan <pocallaghan@xxxxxxxxx> wrote: > > I've replaced my ageing Nvidia card with a more recent and much faster > AMD GPU. However when I boot the system, the default display still > shows as the built-in Intel chip, even though AMD modules are loaded: > > $ sudo lsmod|grep -i amd > amdgpu 10153984 1 > iommu_v2 24576 1 amdgpu > gpu_sched 49152 1 amdgpu > drm_ttm_helper 16384 1 amdgpu > drm_buddy 20480 2 amdgpu,i915 > drm_display_helper 180224 2 amdgpu,i915 > ttm 94208 3 amdgpu,drm_ttm_helper,i915 > > (Nvidia modules are not loaded). > > Inxi shows: > > $ inxi -G > Graphics: > Device-1: Intel IvyBridge GT2 [HD Graphics 4000] driver: i915 v: kernel > Device-2: AMD Ellesmere [Radeon RX 470/480/570/570X/580/580X/590] > driver: amdgpu v: kernel > Display: x11 server: X.Org v: 1.20.14 with: Xwayland v: 22.1.3 driver: X: > loaded: amdgpu,modesetting unloaded: fbdev,vesa dri: crocus gpu: i915 > resolution: 1920x1080~60Hz > OpenGL: renderer: Mesa Intel HD Graphics 4000 (IVB GT2) v: 4.2 Mesa > 22.1.7 > > Switcherooctl shows both GPUs: > > $ switcherooctl list > Device: 0 > Name: Intel® HD Graphics 4000 > Default: yes > Environment: DRI_PRIME=pci-0000_00_02_0 > > Device: 1 > Name: Advanced Micro Devices, Inc. [AMD®/ATI] Ellesmere > [Radeon RX 470/480/570/570X/580/580X/590] (Radeon RX 580) > Default: no > Environment: DRI_PRIME=pci-0000_01_00_0 > > I should mention that both GPUs are connected through an HDMI switch to > a single monitor. I've used this successfully in the past to get PCI > passthrough on Windows VMs for gaming. > > I haven't touched anything else. I tried unplugging the i915 and > rebooting (after removing the HDMI switch and connecting the monitor > directly), but simply got a blank screen (in fact three dots at the top > left). In order to disable i915 altogether, I used an option in bios/efi firmware. (I have an NVIDIA card and want to use it always/for any application.) > Is there some grub magic I need to do? I assumed this would be > automatic but it seems not. If the intention is to use either i915 or the AMD card depending on the application that is AMD Dynamic Switchable Graphics, I would suggest looking at https://wiki.archlinux.org/title/PRIME#Gnome_integration https://wiki.archlinux.org/title/PRIME https://wiki.archlinux.org/title/ATI https://wiki.archlinux.org/title/AMDGPU greg _______________________________________________ users mailing list -- users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/users@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam, report it: https://pagure.io/fedora-infrastructure/new_issue
