When I rebooted my computer into Fedora this morning, it’s not talking to my right monitor. I don’t think it’s a hardware issue, because the BIOS sees both monitors, but when it boots, the monitor says it’s not getting a signal. When I go into settings to look at the display(s), the OS thinks that it only has one monitor. Any ideas?

[Afternoon update]

Apparently it was due to a kernel update. I backed up to the previous kernel and it seems to be working now.

[November 4th update]

Well, I’ve updated kernels several times, and this weekend I upgraded from Fedora 40 to Fedora 41. The problem persists. The OS is clearly having trouble seeing the second monitor. Do I need to replace the video card? How should I diagnose this?

[Bumped]

[Veterans’ Day update]

Well, I got no response from the Fedora Forum. This is what I get when I ixni:

inxi -Fzx

System:
Kernel: 6.11.6-300.fc41.x86_64 arch: x86_64 bits: 64 compiler: gcc
v: 2.43.1-2.fc41
Console: pty pts/0 Distro: Fedora Linux 41 (Workstation Edition)
Machine:
Type: Desktop Mobo: Micro-Star model: X570-A PRO (MS-7C37) v: 3.0
serial: UEFI: American Megatrends LLC. v: H.K0 date: 04/27/2023
CPU:
Info: 6-core model: AMD Ryzen 5 3600 bits: 64 type: MT MCP arch: Zen 2
rev: 0 cache: L1: 384 KiB L2: 3 MiB L3: 32 MiB
Speed (MHz): avg: 3596 min/max: 550/4208 boost: enabled cores: 1: 3596
2: 3596 3: 3596 4: 3596 5: 3596 6: 3596 7: 3596 8: 3596 9: 3596 10: 3596
11: 3596 12: 3596 bogomips: 86403
Flags: avx avx2 ht lm nx pae sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3 svm
Graphics:
Device-1: Advanced Micro Devices [AMD/ATI] Caicos [Radeon HD 6450/7450/8450
/ R5 230 OEM] vendor: XFX Pine driver: radeon v: kernel arch: TeraScale-2
bus-ID: 2e:00.0 temp: 62.0 C
Display: unspecified server: X.Org v: 24.1.4 with: Xwayland v: 24.1.4
driver: X: loaded: radeon unloaded: fbdev,modesetting,vesa dri: r600
gpu: radeon resolution: 1920×1080~60Hz
API: OpenGL v: 4.5 vendor: mesa v: 24.2.6 glx-v: 1.4 direct-render: yes
renderer: AMD CAICOS (DRM 2.50.0 / 6.11.6-300.fc41.x86_64 LLVM 19.1.0)
API: EGL Message: EGL data requires eglinfo. Check –recommends.
Audio:
Device-1: C-Media CMI8738/CMI8768 PCI Audio driver: snd_cmipci v: kernel
bus-ID: 2a:00.0
Device-2: Advanced Micro Devices [AMD/ATI] Caicos HDMI Audio [Radeon HD
6450 / 7450/8450/8490 OEM R5 230/235/235X OEM] vendor: XFX Pine
driver: snd_hda_intel v: kernel bus-ID: 2e:00.1
Device-3: Advanced Micro Devices [AMD] Starship/Matisse HD Audio
vendor: Micro-Star MSI X570-A PRO driver: snd_hda_intel v: kernel
bus-ID: 30:00.4
API: ALSA v: k6.11.6-300.fc41.x86_64 status: kernel-api
Server-1: PipeWire v: 1.2.6 status: off
Network:
Device-1: Realtek RTL8111/8168/8211/8411 PCI Express Gigabit Ethernet
vendor: Micro-Star MSI X570-A PRO driver: r8169 v: kernel port: d000
bus-ID: 27:00.0
IF: enp39s0 state: up speed: 100 Mbps duplex: full mac:
Drives:
Local Storage: total: 2.05 TiB used: 1.08 TiB (52.5%)
ID-1: /dev/nvme0n1 vendor: Patriot model: Viper M.2 VPN100
size: 238.47 GiB temp: 27.9 C
ID-2: /dev/sda vendor: Western Digital model: WD20EZAZ-00L9GB0
size: 1.82 TiB temp: 31 C
Partition:
ID-1: / size: 231.3 GiB used: 38.79 GiB (16.8%) fs: btrfs
dev: /dev/nvme0n1p3
ID-2: /boot size: 973.4 MiB used: 515.7 MiB (53.0%) fs: ext4
dev: /dev/nvme0n1p2
ID-3: /boot/efi size: 598.8 MiB used: 19.3 MiB (3.2%) fs: vfat
dev: /dev/nvme0n1p1
ID-4: /home size: 1.79 TiB used: 1.04 TiB (58.0%) fs: ext4 dev: /dev/sda1
Swap:
ID-1: swap-1 type: zram size: 8 GiB used: 0 KiB (0.0%) dev: /dev/zram0
Sensors:
System Temperatures: cpu: 52.2 C mobo: N/A gpu: radeon temp: 62.0 C
Fan Speeds (rpm): N/A
Info:
Memory: total: 32 GiB available: 31.26 GiB used: 21.5 GiB (68.8%)
Processes: 479 Uptime: 5h 22m Init: systemd target: graphical (5)
Packages: 16 note: see –rpm Compilers: gcc: 14.2.1 Shell: Bash v: 5.2.32
inxi: 3.3.36

I’ve seen some people say that they solved the problem by upgrading Nvidia drivers, but would that work for a Radeon? Or should I upgrade Radeon drivers? Which one?