I’ve since some days the same issue/symptoms with a different configuration. My Dell Optiplex 3070 has a built in Coffee-Lake GPU and in addition I use since years a second GPU from AMD. My inxi data are:
System:
Kernel: 6.17.1-0-MANJARO arch: x86_64 bits: 64 compiler: gcc v: 15.2.1
clocksource: tsc avail: acpi_pm
parameters: BOOT_IMAGE=/boot/vmlinuz-6.17-x86_64
root=UUID=7bc67a3c-9b33-479c-b74e-5fb4ef1e532a rw quiet apparmor=1
security=apparmor resume=UUID=7f827f88-5e1a-44c5-a730-fd3837cd104f
udev.log_priority=3
Desktop: Xfce v: 4.20.1 tk: Gtk v: 3.24.48 wm: xfwm4 v: 4.20.0
with: xfce4-panel tools: light-locker vt: 7 dm: LightDM v: 1.32.0
Distro: Manjaro base: Arch Linux
Machine:
Type: Desktop System: Dell product: OptiPlex 3070 v: N/A
serial: <superuser required> Chassis: type: 3 serial: <superuser required>
Mobo: Dell model: 07WP95 v: A00 serial: <superuser required> part-nu: 0930
uuid: <superuser required> UEFI: Dell v: 1.26.0 date: 02/29/2024
Battery:
Message: No system battery data found. Is one present?
Memory:
System RAM: total: 16 GiB available: 15.43 GiB used: 2.15 GiB (13.9%)
Message: For most reliable report, use superuser + dmidecode.
Array-1: capacity: 32 GiB slots: 2 modules: 2 EC: None
max-module-size: 16 GiB note: est.
Device-1: DIMM1 type: DDR4 detail: synchronous size: 8 GiB speed:
spec: 2666 MT/s actual: 2400 MT/s volts: curr: 1 width (bits): data: 64
total: 64 manufacturer: 04CD000080CE part-no: F4-2666C19-8GNT serial: N/A
Device-2: DIMM2 type: DDR4 detail: synchronous size: 8 GiB speed:
spec: 2666 MT/s actual: 2400 MT/s volts: curr: 1 width (bits): data: 64
total: 64 manufacturer: 04CD000080CE part-no: F4-2666C19-8GNT serial: N/A
PCI Slots:
Permissions: Unable to run dmidecode. Root privileges required.
CPU:
Info: model: Intel Core i3-9100 bits: 64 type: MCP arch: Coffee Lake
gen: core 9 level: v3 note: check built: 2018 process: Intel 14nm family: 6
model-id: 0x9E (158) stepping: 0xB (11) microcode: 0xF6
Topology: cpus: 1x dies: 1 clusters: 4 cores: 4 smt: <unsupported> cache:
L1: 256 KiB desc: d-4x32 KiB; i-4x32 KiB L2: 1024 KiB desc: 4x256 KiB
L3: 6 MiB desc: 1x6 MiB
Speed (MHz): avg: 800 min/max: 800/4200 scaling: driver: intel_pstate
governor: powersave cores: 1: 800 2: 800 3: 800 4: 800 bogomips: 28800
Flags: 3dnowprefetch abm acpi adx aes aperfmperf apic arat
arch_capabilities arch_perfmon art avx avx2 bmi1 bmi2 bts clflush
clflushopt cmov constant_tsc cpuid cpuid_fault cx16 cx8 de ds_cpl dtes64
dtherm dts epb ept ept_ad erms est f16c flexpriority flush_l1d fma fpu
fsgsbase fxsr ht hwp hwp_act_window hwp_epp hwp_notify ibpb ibrs ida
intel_pt invpcid lahf_lm lm mca mce md_clear mmx monitor movbe mpx msr
mtrr nonstop_tsc nopl nx pae pat pbe pcid pclmulqdq pdcm pdpe1gb pebs pge
pln pni popcnt pse pse36 pti pts rdrand rdseed rdtscp rep_good sdbg sep
smap smep ss ssbd sse sse2 sse4_1 sse4_2 ssse3 stibp syscall tm tm2
tpr_shadow tsc tsc_adjust tsc_deadline_timer vme vmx vnmi vpid x2apic
xgetbv1 xsave xsavec xsaveopt xsaves xtopology xtpr
Vulnerabilities:
Type: gather_data_sampling mitigation: Microcode
Type: ghostwrite status: Not affected
Type: indirect_target_selection status: Not affected
Type: itlb_multihit status: KVM: VMX disabled
Type: l1tf mitigation: PTE Inversion; VMX: conditional cache flushes, SMT
disabled
Type: mds mitigation: Clear CPU buffers; SMT disabled
Type: meltdown mitigation: PTI
Type: mmio_stale_data mitigation: Clear CPU buffers; SMT disabled
Type: old_microcode status: Not affected
Type: reg_file_data_sampling status: Not affected
Type: retbleed mitigation: IBRS
Type: spec_rstack_overflow status: Not affected
Type: spec_store_bypass mitigation: Speculative Store Bypass disabled via
prctl
Type: spectre_v1 mitigation: usercopy/swapgs barriers and __user pointer
sanitization
Type: spectre_v2 mitigation: IBRS; IBPB: conditional; STIBP: disabled;
RSB filling; PBRSB-eIBRS: Not affected; BHI: Not affected
Type: srbds mitigation: Microcode
Type: tsa status: Not affected
Type: tsx_async_abort status: Not affected
Type: vmscape mitigation: IBPB before exit to userspace
Graphics:
Device-1: Intel CoffeeLake-S GT2 [UHD Graphics 630] vendor: Dell
driver: i915 v: kernel arch: Gen-9.5 process: Intel 14nm built: 2016-20
ports: active: DP-1 empty: DP-2, HDMI-A-1, HDMI-A-2, HDMI-A-3
bus-ID: 00:02.0 chip-ID: 8086:3e91 class-ID: 0300
Device-2: Advanced Micro Devices [AMD/ATI] Navi 24 [Radeon RX 6400/6500
XT/6500M] vendor: Sapphire driver: N/A alternate: amdgpu arch: RDNA-2
code: Navi-2x process: TSMC n7 (7nm) built: 2020-22 pcie: gen: 4
speed: 16 GT/s lanes: 16 bus-ID: 03:00.0 chip-ID: 1002:743f class-ID: 0300
Display: x11 server: X.Org v: 21.1.18 compositor: xfwm4 v: 4.20.0 driver:
X: loaded: modesetting alternate: fbdev,vesa dri: iris gpu: i915
display-ID: :0.0 screens: 1
Screen-1: 0 s-res: 2560x1440 s-dpi: 96 s-size: 678x382mm (26.69x15.04")
s-diag: 778mm (30.64")
Monitor-1: DP-1 model: Dell U2520D serial: <filter> built: 2020 res:
mode: 2560x1440 hz: 60 scale: 100% (1) dpi: 118 gamma: 1.2 chroma: red:
x: 0.686 y: 0.310 green: x: 0.271 y: 0.663 blue: x: 0.149 y: 0.059 white:
x: 0.314 y: 0.329 size: 553x311mm (21.77x12.24") diag: 634mm (25")
ratio: 16:9 modes: 2560x1440, 2048x1280, 1920x1200, 2048x1080, 1920x1080,
1920x1080i, 1600x1200, 1600x900, 1280x1024, 1152x864, 1280x720, 1024x768,
800x600, 720x576, 720x480, 640x480, 720x400
API: EGL v: 1.5 hw: drv: intel iris platforms: device: 0 drv: iris
device: 1 drv: swrast gbm: drv: iris surfaceless: drv: iris x11: drv: iris
inactive: wayland
API: OpenGL v: 4.6 compat-v: 4.5 vendor: intel mesa v: 25.2.3-arch1.2
glx-v: 1.4 direct-render: yes renderer: Mesa Intel UHD Graphics 630 (CFL
GT2) device-ID: 8086:3e91 memory: 15.06 GiB unified: yes
Info: Tools: api: eglinfo,glxinfo de: xfce4-display-settings
x11: xdpyinfo, xprop, xrandr
Audio:
Device-1: Intel Cannon Lake PCH cAVS vendor: Dell driver: snd_hda_intel
v: kernel alternate: snd_soc_avs,snd_sof_pci_intel_cnl bus-ID: 00:1f.3
chip-ID: 8086:a348 class-ID: 0403
Device-2: Advanced Micro Devices [AMD/ATI] Navi 21/23 HDMI/DP Audio
driver: snd_hda_intel v: kernel pcie: gen: 4 speed: 16 GT/s lanes: 16
bus-ID: 03:00.1 chip-ID: 1002:ab28 class-ID: 0403
API: ALSA v: k6.17.1-0-MANJARO status: kernel-api with: aoss
type: oss-emulator tools: alsactl,alsamixer,amixer
Server-1: PipeWire v: 1.4.8 status: active with: 1: pipewire-media-session
status: active 2: pw-jack type: plugin tools: pw-cat,pw-cli
Server-2: PulseAudio v: 17.0-43-g3e2bb status: active with:
1: pulseaudio-alsa type: plugin 2: pulseaudio-jack type: module
tools: pacat,pactl,pavucontrol
Network:
Device-1: Realtek RTL8111/8168/8211/8411 PCI Express Gigabit Ethernet
vendor: Dell driver: r8168 v: 8.055.00 modules: r8169 pcie: gen: 1
speed: 2.5 GT/s lanes: 1 port: 3000 bus-ID: 04:00.0 chip-ID: 10ec:8168
class-ID: 0200
IF: enp4s0 state: up speed: 1000 Mbps duplex: full mac: <filter>
IP v4: <filter> type: dynamic noprefixroute scope: global
broadcast: <filter>
IP v6: <filter> type: dynamic noprefixroute scope: global
IP v6: <filter> type: dynamic noprefixroute scope: global
IP v6: <filter> type: noprefixroute scope: link
Info: services: NetworkManager,systemd-timesyncd
WAN IP: <filter>
Bluetooth:
Message: No bluetooth data found.
Logical:
Message: No logical block device data found.
RAID:
Message: No RAID data found.
Drives:
Local Storage: total: 1.36 TiB used: 818.33 GiB (58.6%)
SMART Message: Unable to run smartctl. Root privileges required.
ID-1: /dev/nvme0n1 maj-min: 259:0 vendor: Samsung model: SSD 980 PRO 500GB
size: 465.76 GiB block-size: physical: 512 B logical: 512 B speed: 63.2 Gb/s
lanes: 4 tech: SSD serial: <filter> fw-rev: 2B2QGXA7 temp: 29.9 C
scheme: GPT
ID-2: /dev/sda maj-min: 8:0 vendor: Samsung model: SSD 860 EVO 1TB
size: 931.51 GiB block-size: physical: 512 B logical: 512 B speed: 6.0 Gb/s
tech: SSD serial: <filter> fw-rev: 3B6Q scheme: GPT
Optical-1: /dev/sr0 vendor: PLDS model: DVD+-RW DU-8A5LH rev: 6D1M
dev-links: cdrom
Features: speed: 24 multisession: yes audio: yes dvd: yes
rw: cd-r,cd-rw,dvd-r state: running
Partition:
ID-1: / raw-size: 456.66 GiB size: 448.43 GiB (98.20%)
used: 181.14 GiB (40.4%) fs: ext4 dev: /dev/nvme0n1p2 maj-min: 259:2
label: N/A uuid: 7bc67a3c-9b33-479c-b74e-5fb4ef1e532a
ID-2: /boot/efi raw-size: 300 MiB size: 299.4 MiB (99.80%)
used: 39.9 MiB (13.3%) fs: vfat dev: /dev/nvme0n1p1 maj-min: 259:1
label: NO_LABEL uuid: D433-1BC5
ID-3: /mnt/Bigdata raw-size: 931.51 GiB size: 915.82 GiB (98.32%)
used: 637.16 GiB (69.6%) fs: ext4 dev: /dev/sda1 maj-min: 8:1
label: Samsung860Evo uuid: 0ca23a1c-af43-4411-984f-6579e9bb8065
Swap:
Kernel: swappiness: 60 (default) cache-pressure: 100 (default) zswap: yes
compressor: zstd max-pool: 20%
ID-1: swap-1 type: partition size: 8.8 GiB used: 0 KiB (0.0%) priority: -2
dev: /dev/nvme0n1p3 maj-min: 259:3 label: N/A
uuid: 7f827f88-5e1a-44c5-a730-fd3837cd104f
Unmounted:
Message: No unmounted partitions found.
USB:
Hub-1: 1-0:1 info: hi-speed hub with single TT ports: 16 rev: 2.0
speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 chip-ID: 1d6b:0002
class-ID: 0900
Hub-2: 1-1:2 info: Texas Instruments ports: 6 rev: 2.1
speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 chip-ID: 0451:8442
class-ID: 0900
Device-1: 1-1.5:4 info: Texas Instruments type: HID
driver: hid-generic,usbhid interfaces: 1 rev: 2.0
speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 chip-ID: 0451:82ff
class-ID: 0300
Device-2: 1-1.6:5 info: Texas Instruments type: billboard driver: N/A
interfaces: 1 rev: 2.0 speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0
chip-ID: 0451:82ee class-ID: 1100
Device-3: 1-3:3 info: Dell KB216 Wired Keyboard type: keyboard,HID
driver: hid-generic,usbhid interfaces: 2 rev: 1.1
speed: 1.5 Mb/s (183 KiB/s) lanes: 1 mode: 1.0 power: 100mA
chip-ID: 413c:2113 class-ID: 0300
Device-4: 1-5:6 info: Dell Laser Mouse MS3220 type: mouse,HID
driver: hid-generic,usbhid interfaces: 3 rev: 2.0 speed: 12 Mb/s (1.4 MiB/s)
lanes: 1 mode: 1.1 power: 100mA chip-ID: 413c:250e class-ID: 0300
Hub-3: 2-0:1 info: super-speed hub ports: 8 rev: 3.1
speed: 10 Gb/s (1.16 GiB/s) lanes: 1 mode: 3.2 gen-2x1 chip-ID: 1d6b:0003
class-ID: 0900
Hub-4: 2-3:2 info: Texas Instruments ports: 4 rev: 3.2
speed: 5 Gb/s (596.0 MiB/s) lanes: 1 mode: 3.2 gen-1x1 chip-ID: 0451:8440
class-ID: 0900
Sensors:
System Temperatures: cpu: 42.0 C pch: 42.0 C mobo: N/A
Fan Speeds (rpm): N/A
Repos:
Packages: 2344 pm: pacman pkgs: 2330 libs: 542 tools: pamac pm: flatpak
pkgs: 0 pm: snap pkgs: 14
Active pacman repo servers in: /etc/pacman.d/mirrorlist
1: https://mirror.alpix.eu/manjaro/stable/$repo/$arch
Processes:
CPU top: 5 of 244
1: cpu: 9.6% command: firefox pid: 2263 mem: 314.2 MiB (1.9%)
2: cpu: 8.4% command: firefox pid: 1810 mem: 421.2 MiB (2.6%)
3: cpu: 1.8% command: Xorg pid: 1216 mem: 87.6 MiB (0.5%)
4: cpu: 0.7% command: xfce4-terminal pid: 2506 mem: 58.5 MiB (0.3%)
5: cpu: 0.6% command: xfwm4 pid: 1713 mem: 65.3 MiB (0.4%)
Memory top: 5 of 244
1: mem: 421.2 MiB (2.6%) command: firefox pid: 1810 cpu: 8.4%
2: mem: 314.2 MiB (1.9%) command: firefox pid: 2263 cpu: 9.6%
3: mem: 139.4 MiB (0.8%) command: firefox pid: 2139 cpu: 0.2%
4: mem: 117.8 MiB (0.7%) command: xfdesktop pid: 1747 cpu: 0.1%
5: mem: 107.0 MiB (0.6%) command: firefox pid: 2189 cpu: 0.1%
Info:
Processes: 244 Power: uptime: 7m states: freeze,mem,disk suspend: deep
avail: s2idle wakeups: 0 hibernate: platform avail: shutdown, reboot,
suspend, test_resume image: 6.15 GiB services: upowerd,xfce4-power-manager
Init: systemd v: 257 default: graphical tool: systemctl
Compilers: clang: 20.1.8 gcc: 15.2.1 Shell: Bash v: 5.3.3
running-in: xfce4-terminal inxi: 3.3.39
My display had been successfully run in the past connected to display port of graphics device 2 (Advanced Micro Devices [AMD/ATI] Navi 24 [Radeon RX 6400/6500XT/6500M]), but now I get only black screen. GRUB menu as well as UEFI is shown no matter, which display port I use (device 1 or 2). Now on device 2 no TTY or greeter is shown. Device 1 display port works as expected.
lightDM settings have not been changed and the GPU detection flag is set.
[LightDM]
logind-check-graphical=true
I’m not aware of any “special” settings I made in the last years, so everything is quite vanilla. I’m on stable branch, system had been set-up four or more years ago.
Any idea how to get my second GPU working again? Please, forgive me, if I ask simple questions, but I’ve found after searching and reading for hours no real solution. I worked through the Arch Wiki but found no solution, either. Any hint is welcome.
PS: Running kernel 6.16 does not change the behavior.
Update: Tried out now GDM as alternative to lightDM. Unfortunately, this does not improve the situation. GDM is also not showing up on secondary GPU (device 2) display port. So, it seems to be something else and not the greeter…
Update 2: Used ISO manjaro-xfce-25.0.10-251013-linux612.iso to boot from stick. I can then use both display ports (device 1 coffee-lake, device 2 navi 24) without any black screens. Kernel 6.12 with stable branch updates installed as of today (15.10.2025) fails. Iso with same kernel 6.12 works. Thus, must be something in the various configs or the drivers. Which configs shall I check? Which logs can give insides?
at their disposal – Instead, please help others to make informed suggestions, based on information you provide.