Video drivers no loading on 22.04

After trying to get hardware acceleration working for ffmpeg, I've messed up my installation. I no longer get a GUI and video drivers aren't showing as in use. Trying to re-install packages I think I'm now only making it worse! I did try X -configure, but assume that's not going to work until there's a driver loaded.

Installation is Ubuntu 22.04, all should be up to date.

uname -aLinux server 6.5.0-18-generic #18~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Wed Feb  7 11:40:03 UTC 2 x86_64 x86_64 x86_64 GNU/Linux

There's an onboard intel GPU (that I did have working to provide ffmpeg hardware acceleration before a recent apt upgrade) and a PCIe AMD card.

  *-display UNCLAIMED              description: VGA compatible controller       product: Oland [Radeon HD 8570 / R5 430 OEM / R7 240/340 / Radeon 520 OEM]       vendor: Advanced Micro Devices, Inc. [AMD/ATI]       physical id: 0       bus info: pci@0000:01:00.0       version: 87       width: 64 bits       clock: 33MHz       capabilities: pm pciexpress msi vga_controller bus_master cap_list       configuration: latency=0       resources: memory:d0000000-dfffffff memory:ef300000-ef33ffff ioport:e000(size=256) memory:c0000-dffff  *-display UNCLAIMED       description: Display controller       product: HD Graphics 530       vendor: Intel Corporation       physical id: 2       bus info: pci@0000:00:02.0       version: 06       width: 64 bits       clock: 33MHz       capabilities: pciexpress msi pm cap_list       configuration: latency=0       resources: memory:ee000000-eeffffff memory:c0000000-cfffffff ioport:f000(size=64)  *-graphics       product: EFI VGA       physical id: 1       logical name: /dev/fb0       capabilities: fb       configuration: depth=32 resolution=800,600

GRUB_CMDLINE_LINUX_DEFAULT="systemd.unified_cgroup_hierarchy=false quiet splash"

If I try modprobe i915 I currently get modprobe: ERROR: could not insert 'i915': Unknown symbol in module, or unknown parameter (see dmesg)

dmesg shows

[ 3668.482231] drm_display_helper: Unknown symbol cec_transmit_attempt_done_ts (err -2)[ 3668.482354] drm_display_helper: Unknown symbol cec_s_phys_addr (err -2)[ 3668.482399] drm_display_helper: Unknown symbol cec_s_conn_info (err -2)[ 3668.482426] drm_display_helper: Unknown symbol cec_s_phys_addr_from_edid (err -2)[ 3668.482780] drm_display_helper: Unknown symbol cec_unregister_adapter (err -2)[ 3668.482921] drm_display_helper: Unknown symbol cec_allocate_adapter (err -2)[ 3668.483044] drm_display_helper: Unknown symbol cec_fill_conn_info_from_drm (err -2)[ 3668.483067] drm_display_helper: Unknown symbol cec_received_msg_ts (err -2)[ 3668.483165] drm_display_helper: Unknown symbol cec_register_adapter (err -2)

I'm not sure what driver the AMD card should be using.

Any suggestions to avoid a complete OS re-install gratefully received.