Blank screen after suspend/wakeup cycle

Hi There,
hope it is the right place to post. It is the second time that on my iMac mid 2011 with Manjaro:

  1. I suspend the system (no hybernation, just suspend)
  2. I wake up the system
  3. I can “hear” iMac woke up (some very low noise comes from behind the screen)
  4. the screen is completely black

Issue is random, it happend a couple of times in three months time, always after an entire night of being suspended.

I tried to login “blind”, or to switch to a virtual console, just to see if gdm is the issue, but no luck. Where should I look for hints of possible causes? An idea what would be the trouble maker?

Thx!

System:
  Kernel: 6.6.10-1-MANJARO arch: x86_64 bits: 64 compiler: gcc v: 13.2.1
    clocksource: tsc avail: hpet,acpi_pm
    parameters: root=UUID=6847c1da-8688-4a03-a8cc-2378d1af3dbd rw quiet
    splash udev.log_priority=3 initrd=\boot\initramfs-6.6-x86_64.img
  Desktop: GNOME v: 45.3 tk: GTK v: 3.24.39 wm: gnome-shell
    tools: gsd-screensaver-proxy dm: GDM v: 45.0.1 Distro: Manjaro Linux
    base: Arch Linux
Machine:
  Type: Desktop System: Apple product: iMac12,1 v: 1.0
    serial: <superuser required> Chassis: type: 13 v: Mac-942B5BF58194151B
    serial: <superuser required>
  Mobo: Apple model: Mac-942B5BF58194151B serial: <superuser required>
    uuid: <superuser required> UEFI: Apple v: 87.0.0.0.0 date: 06/14/2019
Battery:
  Device-1: hid-10:9a:dd:91:c7:dc-battery model: rednose’s Keyboard
    serial: N/A charge: N/A status: discharging
  Device-2: hidpp_battery_0 model: Logitech Wireless Mobile Mouse MX
    Anywhere 2S serial: <filter> charge: 55% (should be ignored)
    rechargeable: yes status: discharging
Memory:
  System RAM: total: 4 GiB available: 3.81 GiB used: 2.57 GiB (67.4%)
  Message: For most reliable report, use superuser + dmidecode.
  Array-1: capacity: 16 GiB slots: 4 modules: 2 EC: None
    max-module-size: 4 GiB note: est.
  Device-1: DIMM0 type: DDR3 detail: synchronous size: 2 GiB
    speed: 1333 MT/s volts: N/A width: N/A manufacturer: 0x02FE
    part-no: 0x45424A3231554538424655302D444A2D4620 serial: <filter>
  Device-2: DIMM0 type: DDR3 detail: synchronous size: 2 GiB
    speed: 1333 MT/s volts: N/A width: N/A manufacturer: 0x02FE
    part-no: 0x45424A3231554538424655302D444A2D4620 serial: <filter>
  Device-3: DIMM1 type: no module installed
  Device-4: DIMM1 type: no module installed
CPU:
  Info: model: Intel Core i5-2400S bits: 64 type: MCP arch: Sandy Bridge
    gen: core 2 level: v2 built: 2010-12 process: Intel 32nm family: 6
    model-id: 0x2A (42) stepping: 7 microcode: 0x2F
  Topology: cpus: 1x 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: 1600 min/max: 1600/3300 scaling: driver: intel_cpufreq
    governor: schedutil cores: 1: 1600 2: 1600 3: 1600 4: 1600 bogomips: 20009
  Flags: acpi aes aperfmperf apic arat arch_perfmon avx bts clflush cmov
    constant_tsc cpuid cx16 cx8 de ds_cpl dtes64 dtherm dts ept est
    flexpriority flush_l1d fpu fxsr ht ibpb ibrs ida lahf_lm lm mca mce
    md_clear mmx monitor msr mtrr nonstop_tsc nopl nx pae pat pbe pcid
    pclmulqdq pdcm pebs pge pln pni popcnt pse pse36 pti pts rdtscp rep_good
    sep smx ssbd sse sse2 sse4_1 sse4_2 ssse3 stibp syscall tm tm2 tpr_shadow
    tsc tsc_deadline_timer vme vmx vnmi vpid x2apic xsave xsaveopt xtopology
    xtpr
  Vulnerabilities:
  Type: gather_data_sampling 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 status: Unknown: No mitigations
  Type: retbleed status: Not affected
  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: Retpolines, IBPB: conditional, IBRS_FW,
    STIBP: disabled, RSB filling, PBRSB-eIBRS: Not affected
  Type: srbds status: Not affected
  Type: tsx_async_abort status: Not affected
Graphics:
  Device-1: Intel 2nd Generation Core Processor Family Integrated Graphics
    driver: i915 v: kernel arch: Gen-6 code: Sandybridge process: Intel 32nm
    built: 2011 ports: active: none empty: VGA-1 bus-ID: 00:02.0
    chip-ID: 8086:0102 class-ID: 0380
  Device-2: AMD Whistler [Radeon HD 6630M/6650M/6750M/7670M/7690M]
    vendor: Apple driver: radeon v: kernel alternate: amdgpu arch: TeraScale-2
    code: Evergreen process: TSMC 32-40nm built: 2009-15 pcie: gen: 1
    speed: 2.5 GT/s lanes: 16 link-max: gen: 2 speed: 5 GT/s ports:
    active: eDP-1 empty: DP-1, DP-2, DP-3, VGA-2 bus-ID: 01:00.0
    chip-ID: 1002:6741 class-ID: 0300
  Device-3: Apple FaceTime HD Camera (Built-in) driver: uvcvideo type: USB
    rev: 2.0 speed: 480 Mb/s lanes: 1 mode: 2.0 bus-ID: 2-2:3 chip-ID: 05ac:850b
    class-ID: 0e02 serial: <filter>
  Display: wayland server: X.org v: 1.21.1.10 with: Xwayland v: 23.2.3
    compositor: gnome-shell driver: X: loaded: modesetting,radeon
    alternate: fbdev,vesa dri: r600,crocus gpu: radeon display-ID: 0
  Monitor-1: eDP-1 model: Apple iMac built: 2010 res: 1920x1080 dpi: 103
    gamma: 1.2 size: 475x267mm (18.7x10.51") diag: 545mm (21.5") ratio: 16:9
    modes: max: 1920x1080 min: 640x480
  API: EGL v: 1.5 hw: drv: intel crocus drv: amd r600 platforms: device: 0
    drv: r600 device: 1 drv: crocus device: 2 drv: swrast gbm: drv: crocus
    surfaceless: drv: r600 wayland: drv: r600 x11: drv: r600
  API: OpenGL v: 4.5 compat-v: 3.3 vendor: mesa v: 23.3.3-manjaro1.1
    glx-v: 1.4 direct-render: yes renderer: AMD TURKS (DRM 2.50.0 /
    6.6.10-1-MANJARO LLVM 16.0.6) device-ID: 1002:6741 memory: 500 MiB
    unified: no display-ID: :0.0
Audio:
  Device-1: Intel 6 Series/C200 Series Family High Definition Audio
    driver: snd_hda_intel v: kernel bus-ID: 00:1b.0 chip-ID: 8086:1c20
    class-ID: 0403
  Device-2: AMD Turks HDMI Audio [Radeon HD 6500/6600 / 6700M Series]
    vendor: Apple driver: snd_hda_intel v: kernel pcie: gen: 1 speed: 2.5 GT/s
    lanes: 16 link-max: gen: 2 speed: 5 GT/s bus-ID: 01:00.1
    chip-ID: 1002:aa90 class-ID: 0403
  API: ALSA v: k6.6.10-1-MANJARO status: kernel-api tools: N/A
  Server-1: JACK v: 1.9.22 status: off tools: N/A
  Server-2: PipeWire v: 1.0.0 status: active with: 1: pipewire-pulse
    status: active 2: wireplumber status: active 3: pipewire-alsa type: plugin
    tools: pactl,pw-cat,pw-cli,wpctl
Network:
  Device-1: Broadcom NetXtreme BCM57765 Gigabit Ethernet PCIe driver: tg3
    v: kernel pcie: gen: 1 speed: 2.5 GT/s lanes: 1 port: N/A bus-ID: 02:00.0
    chip-ID: 14e4:16b4 class-ID: 0200
  IF: enp2s0 state: down mac: <filter>
  Device-2: Qualcomm Atheros AR93xx Wireless Network Adapter
    vendor: Apple AirPort Extreme driver: ath9k v: kernel pcie: gen: 1
    speed: 2.5 GT/s lanes: 1 bus-ID: 03:00.0 chip-ID: 168c:0030 class-ID: 0280
  IF: wlp3s0 state: up mac: <filter>
  IP v4: <filter> type: dynamic noprefixroute scope: global
    broadcast: <filter>
  IP v6: <filter> type: dynamic noprefixroute scope: global
  IP v6: <filter> type: noprefixroute scope: link
  IF-ID-1: de-dus-wg-001 state: unknown speed: N/A duplex: N/A mac: N/A
  IP v4: <filter> type: noprefixroute scope: global
  IP v6: <filter> type: noprefixroute scope: global
  IP v6: <filter> type: noprefixroute scope: link
  WAN IP: <filter>
Bluetooth:
  Device-1: Apple Built-in Bluetooth 2.0+EDR HCI driver: btusb v: 0.8
    type: USB rev: 2.0 speed: 12 Mb/s lanes: 1 mode: 1.1 bus-ID: 2-1.1.1:6
    chip-ID: 05ac:8215 class-ID: fe01 serial: <filter>
  Report: rfkill ID: hci0 rfk-id: 0 state: up address: see --recommends
Logical:
  Message: No logical block device data found.
RAID:
  Message: No RAID data found.
Drives:
  Local Storage: total: 2.27 TiB used: 870.7 GiB (37.4%)
  SMART Message: Required tool smartctl not installed. Check --recommends
  ID-1: /dev/sda maj-min: 8:0 vendor: Seagate model: ST3500418AS
    size: 465.76 GiB block-size: physical: 512 B logical: 512 B speed: 3.0 Gb/s
    tech: HDD rpm: 7200 serial: <filter> fw-rev: AP2A scheme: GPT
  ID-2: /dev/sdb maj-min: 8:16 vendor: Samsung model: ST2000LM003 HN-M201RAD
    size: 1.82 TiB block-size: physical: 4096 B logical: 512 B type: USB
    rev: 2.1 spd: 480 Mb/s lanes: 1 mode: 2.0 tech: HDD rpm: 5400
    serial: <filter> fw-rev: 1153 scheme: GPT
  Optical-1: /dev/sr0 vendor: HL-DT-ST model: DVDRW GA32N rev: KE06
    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: 59.58 GiB size: 58.34 GiB (97.92%) used: 21.41 GiB (36.7%)
    fs: ext4 dev: /dev/sda6 maj-min: 8:6 label: Manjaro
    uuid: 6847c1da-8688-4a03-a8cc-2378d1af3dbd
  ID-2: /boot/efi raw-size: 316.7 MiB size: 316.1 MiB (99.79%)
    used: 13.9 MiB (4.4%) fs: vfat dev: /dev/sda4 maj-min: 8:4 label: BOOT EFI
    uuid: E785-8807
  ID-3: /mnt/iMac-home raw-size: 325.96 GiB size: 325.96 GiB (100.00%)
    used: 246.37 GiB (75.6%) fs: hfsplus dev: /dev/sda2 maj-min: 8:2
    label: Macintosh HD uuid: e3e72228-72b6-3548-ac52-91c2143992b6
  ID-4: /run/media/rednose/MXlinux raw-size: 59.51 GiB
    size: 58.28 GiB (97.92%) used: 15.91 GiB (27.3%) fs: ext4 dev: /dev/sda5
    maj-min: 8:5 label: MXlinux uuid: dd8f79b6-fd8e-4102-a957-3b0d830d047e
  ID-5: /run/media/rednose/Media raw-size: 653.28 GiB
    size: 653.28 GiB (100.00%) used: 587.01 GiB (89.9%) fs: hfsplus
    dev: /dev/sdb5 maj-min: 8:21 label: Media
    uuid: 73a461b9-208e-3535-a90d-e024e11158d3
Swap:
  Kernel: swappiness: 60 (default) cache-pressure: 100 (default) zswap: yes
    compressor: zstd max-pool: 20%
  ID-1: swap-1 type: partition size: 19.23 GiB used: 2 MiB (0.0%)
    priority: -2 dev: /dev/sda7 maj-min: 8:7 label: N/A
    uuid: 9504eab5-5e87-4353-930e-ac9aa30fc1c8
Unmounted:
  ID-1: /dev/sda1 maj-min: 8:1 size: 200 MiB fs: vfat label: EFI
    uuid: 2860-11F4
  ID-2: /dev/sda3 maj-min: 8:3 size: 619.9 MiB fs: hfsplus
    label: Recovery HD uuid: 9db3ecb9-8192-3e57-99bd-5a2711e45985
  ID-3: /dev/sdb1 maj-min: 8:17 size: 200 MiB fs: vfat label: EFI
    uuid: 67E3-17ED
  ID-4: /dev/sdb2 maj-min: 8:18 size: 1.05 TiB fs: hfsplus label: Backup
    uuid: 376c5d99-47a8-3623-b2ef-c499bac3e7a0
  ID-5: /dev/sdb3 maj-min: 8:19 size: 59.6 GiB fs: ext4 label: old-linuxA
    uuid: 125db090-52a2-4b2e-9e02-29da443ef894
  ID-6: /dev/sdb4 maj-min: 8:20 size: 59.6 GiB fs: ext4 label: old-linuxB
    uuid: e78c05ab-4fc6-4fee-8174-442a179958bb
USB:
  Hub-1: 1-0:1 info: full speed or root hub ports: 2 rev: 1.1
    speed: 12 Mb/s (1.4 MiB/s) lanes: 1 mode: 1.1 chip-ID: 1d6b:0001
    class-ID: 0900
  Hub-2: 2-0:1 info: full speed or root hub ports: 6 rev: 2.0
    speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 chip-ID: 1d6b:0002
    class-ID: 0900
  Hub-3: 2-1:2 info: Microchip (formerly SMSC) USB 2.0 Hub ports: 3 rev: 2.0
    speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 power: 2mA
    chip-ID: 0424:2514 class-ID: 0900
  Hub-4: 2-1.1:4 info: Broadcom BCM2046B1 USB 2.0 Hub (part of BCM2046
    Bluetooth) ports: 3 rev: 2.0 speed: 12 Mb/s (1.4 MiB/s) lanes: 1 mode: 1.1
    chip-ID: 0a5c:4500 class-ID: 0900
  Device-1: 2-1.1.1:6 info: Apple Built-in Bluetooth 2.0+EDR HCI
    type: bluetooth driver: btusb interfaces: 4 rev: 2.0
    speed: 12 Mb/s (1.4 MiB/s) lanes: 1 mode: 1.1 chip-ID: 05ac:8215
    class-ID: fe01 serial: <filter>
  Device-2: 2-1.2:5 info: LaCie Rugged THB USB 3.0 type: mass storage
    driver: uas interfaces: 1 rev: 2.1 speed: 480 Mb/s (57.2 MiB/s) lanes: 1
    mode: 2.0 power: 500mA chip-ID: 059f:1075 class-ID: 0806 serial: <filter>
  Device-3: 2-2:3 info: Apple FaceTime HD Camera (Built-in) type: video
    driver: uvcvideo interfaces: 3 rev: 2.0 speed: 480 Mb/s (57.2 MiB/s)
    lanes: 1 mode: 2.0 power: 500mA chip-ID: 05ac:850b class-ID: 0e02
    serial: <filter>
  Hub-5: 3-0:1 info: full speed or root hub ports: 2 rev: 1.1
    speed: 12 Mb/s (1.4 MiB/s) lanes: 1 mode: 1.1 chip-ID: 1d6b:0001
    class-ID: 0900
  Hub-6: 4-0:1 info: full speed or root hub ports: 8 rev: 2.0
    speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 chip-ID: 1d6b:0002
    class-ID: 0900
  Hub-7: 4-1:2 info: Microchip (formerly SMSC) USB 2.0 Hub ports: 4 rev: 2.0
    speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 power: 2mA
    chip-ID: 0424:2514 class-ID: 0900
  Device-1: 4-1.1:3 info: Apple Internal Memory Card Reader
    type: mass storage driver: usb-storage interfaces: 1 rev: 2.0
    speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 power: 500mA
    chip-ID: 05ac:8403 class-ID: 0806 serial: <filter>
  Device-2: 4-1.2:4 info: Apple Built-in IR Receiver type: HID
    driver: appleir,usbhid interfaces: 1 rev: 2.0 speed: 1.5 Mb/s (183 KiB/s)
    lanes: 1 mode: 1.0 power: 100mA chip-ID: 05ac:8242 class-ID: 0300
  Device-3: 4-1.4:5 info: Logitech Unifying Receiver
    type: keyboard,mouse,HID driver: logitech-djreceiver,usbhid interfaces: 3
    rev: 2.0 speed: 12 Mb/s (1.4 MiB/s) lanes: 1 mode: 1.1 power: 98mA
    chip-ID: 046d:c52b class-ID: 0300
Sensors:
  System Temperatures: cpu: 43.0 C mobo: N/A
  Fan Speeds (rpm): cpu: 1199
Info:
  Processes: 244 Power: uptime: 2h 34m states: freeze,mem,disk suspend: deep
    avail: s2idle wakeups: 1 hibernate: platform
    avail: shutdown,reboot,suspend,test_resume image: 1.51 GiB
    daemons: upowerd,gsd-power Init: systemd v: 255 default: graphical
    tool: systemctl
  Packages: pm: pacman pkgs: 1018 libs: 312 tools: gnome-software,pamac
    Compilers: gcc: 13.2.1 Shell: Zsh v: 5.9 running-in: terminator inxi: 3.3.32
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