Losing Thunderbolt connection every few minutes

Hi there,

I face a (very) annoying recent situation with my Lenovo P1 Gen3 laptop ↔ ThinkPad Thunderbolt 3 Dock (config details below) : I’m loosing Thunderbird connection (wired network, 2 additional screens, sound, some USB devices) every 3-5 min, which then reconnect after 5-10 sec.

What I tried:

  • Rolling back (LTS) kernels from 6.6.47-1 (present) to 5.15.165-1 → problem persists
  • Playing with proprietary / opensource video drivers → problem persists
  • Changing Thunderbolt cable → problem persists
  • Changing dock station (to same one) → problem persists
  • Booting on fresh Manjaro USB flash drive → problem persists (this one’s annoying, made me think about HW failure, but:)
  • Booting on fresh Mint USB flash drive → no problem (but looks like only one additional screen is supported through Thunderbolt) [EDIT] after long tries, the problem is also present when booting on Mint
  • Booting on Manjaro (not USB drive) with only one screen (second disconnected) → problem persists
  • Updated all fw (sudo fwupdmgr refresh --force && sudo fwupdmgr get-updates && sudo fwupdmgr update) → problem persists
  • [Edit] USB_AUTOSUSPEND=0 doesn’t solve the issue

And now I’m running out of ideas to investigate :frowning:

Could someone help me ? Would be very appreciated ! Thanks

inxi -zv8                                                                                                                                          ✔ 
System:
  Kernel: 6.6.47-1-MANJARO arch: x86_64 bits: 64 compiler: gcc v: 14.2.1
    clocksource: tsc avail: acpi_pm
    parameters: BOOT_IMAGE=/boot/vmlinuz-6.6-x86_64
    root=UUID=849a1a22-3296-4110-9f4b-6d3b1f9bca88 rw quiet splash
    resume=UUID=ea2c1d35-19a5-4ad4-83ab-f808075f8261 udev.log_priority=3
  Desktop: KDE Plasma v: 6.0.5 tk: Qt v: N/A info: frameworks v: 6.5.0
    wm: kwin_x11 vt: 2 dm: SDDM Distro: Manjaro base: Arch Linux
Machine:
  Type: Laptop System: LENOVO product: 20TH000XMZ v: ThinkPad P1 Gen 3
    serial: <superuser required> Chassis: type: 10 serial: <superuser required>
  Mobo: LENOVO model: 20TH000XMZ v: SDK0J40697 WIN
    serial: <superuser required> part-nu: LENOVO_MT_20TH_BU_Think_FM_ThinkPad
    P1 Gen 3 uuid: <superuser required> UEFI: LENOVO v: N2VET48W (1.33 )
    date: 06/07/2024
Battery:
  ID-1: BAT0 charge: 65.5 Wh (87.7%) condition: 74.7/80.0 Wh (93.4%)
    volts: 16.6 min: 15.4 model: Celxpert 5B10X19050 type: Li-poly
    serial: <filter> status: not charging cycles: 67
Memory:
  System RAM: total: 64 GiB available: 62.47 GiB used: 13.44 GiB (21.5%)
  Message: For most reliable report, use superuser + dmidecode.
  Array-1: capacity: 64 GiB note: est. slots: 2 modules: 2 EC: None
    max-module-size: 32 GiB note: est.
  Device-1: ChannelA-DIMM0 type: DDR4 detail: synchronous size: 32 GiB
    speed: 2667 MT/s volts: curr: 1 width (bits): data: 64 total: 64
    manufacturer: Corsair part-no: CMSX64GX4M2A2666C18 serial: N/A
  Device-2: ChannelB-DIMM0 type: DDR4 detail: synchronous size: 32 GiB
    speed: 2667 MT/s volts: curr: 1 width (bits): data: 64 total: 64
    manufacturer: Corsair part-no: CMSX64GX4M2A2666C18 serial: N/A
PCI Slots:
  Permissions: Unable to run dmidecode. Root privileges required.
CPU:
  Info: model: Intel Core i7-10750H bits: 64 type: MT MCP arch: Comet Lake
    gen: core 10 level: v3 note: check built: 2020 process: Intel 14nm family: 6
    model-id: 0xA5 (165) stepping: 2 microcode: 0xFC
  Topology: cpus: 1x dies: 1 clusters: 6 cores: 6 threads: 12 tpc: 2
    smt: enabled cache: L1: 384 KiB desc: d-6x32 KiB; i-6x32 KiB L2: 1.5 MiB
    desc: 6x256 KiB L3: 12 MiB desc: 1x12 MiB
  Speed (MHz): avg: 800 min/max: 800/5000 scaling: driver: intel_pstate
    governor: powersave cores: 1: 800 2: 800 3: 800 4: 800 5: 800 6: 800 7: 800
    8: 800 9: 800 10: 800 11: 800 12: 800 bogomips: 62431
  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
    ibrs_enhanced ida intel_pt invpcid lahf_lm lm mca mce md_clear mmx
    monitor movbe mpx msr mtrr nonstop_tsc nopl nx ospke pae pat pbe pcid
    pclmulqdq pdcm pdpe1gb pebs pge pku pln pni popcnt pse pse36 pts rdrand
    rdseed rdtscp rep_good sdbg sep sgx sgx_lc 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: itlb_multihit status: KVM: VMX disabled
  Type: l1tf status: Not affected
  Type: mds status: Not affected
  Type: meltdown status: Not affected
  Type: mmio_stale_data mitigation: Clear CPU buffers; SMT vulnerable
  Type: reg_file_data_sampling status: Not affected
  Type: retbleed mitigation: Enhanced 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: Enhanced / Automatic IBRS; IBPB:
    conditional; RSB filling; PBRSB-eIBRS: SW sequence; BHI: SW loop, KVM: SW
    loop
  Type: srbds mitigation: Microcode
  Type: tsx_async_abort status: Not affected
Graphics:
  Device-1: Intel CometLake-H GT2 [UHD Graphics] vendor: Lenovo driver: i915
    v: kernel arch: Gen-9.5 process: Intel 14nm built: 2016-20 ports:
    active: eDP-1 empty: none bus-ID: 00:02.0 chip-ID: 8086:9bc4
    class-ID: 0300
  Device-2: NVIDIA TU117GLM [Quadro T1000 Mobile] vendor: Lenovo
    driver: nvidia v: 550.107.02 alternate: nouveau,nvidia_drm non-free: 550.xx+
    status: current (as of 2024-09; EOL~2026-12-xx) arch: Turing code: TUxxx
    process: TSMC 12nm FF built: 2018-2022 pcie: gen: 3 speed: 8 GT/s
    lanes: 16 bus-ID: 01:00.0 chip-ID: 10de:1fb9 class-ID: 0300
  Device-3: IMC Networks Integrated Camera driver: uvcvideo type: USB
    rev: 2.0 speed: 480 Mb/s lanes: 1 mode: 2.0 bus-ID: 1-8:2 chip-ID: 13d3:5405
    class-ID: fe01 serial: <filter>
  Display: x11 server: X.Org v: 21.1.13 with: Xwayland v: 24.1.2
    compositor: kwin_x11 driver: X: loaded: modesetting,nvidia unloaded: nouveau
    alternate: fbdev,nv,vesa dri: iris gpu: i915 display-ID: :0 screens: 1
  Screen-1: 0 s-res: 9600x2160 s-dpi: 96 s-size: 2533x570mm (99.72x22.44")
    s-diag: 2596mm (102.22")
  Monitor-1: DP-1-1.2 pos: primary,top-center res: 3840x2160 hz: 60 dpi: 163
    size: 597x336mm (23.5x13.23") diag: 685mm (26.97") modes: N/A
  Monitor-2: DP-1-1.3 pos: top-right res: 3840x2160 hz: 60 dpi: 163
    size: 597x336mm (23.5x13.23") diag: 685mm (26.97") modes: N/A
  Monitor-3: eDP-1 pos: bottom-l res: 1920x1080 hz: 60 dpi: 142
    size: 344x193mm (13.54x7.6") diag: 394mm (15.53") modes: N/A
  API: EGL v: 1.5 hw: drv: intel iris drv: nvidia platforms: device: 0
    drv: nvidia device: 1 drv: iris device: 3 drv: swrast gbm: drv: iris
    surfaceless: drv: nvidia x11: drv: iris inactive: wayland,device-2
  API: OpenGL v: 4.6.0 compat-v: 4.5 vendor: intel mesa v: 24.1.6-arch1.1
    glx-v: 1.4 direct-render: yes renderer: Mesa Intel UHD Graphics (CML GT2)
    device-ID: 8086:9bc4 memory: 30.5 GiB unified: yes
  API: Vulkan v: 1.3.279 layers: 1 device: 0 type: discrete-gpu name: Quadro
    T1000 with Max-Q Design driver: nvidia v: 550.107.02 device-ID: 10de:1fb9
    surfaces: xcb,xlib device: 1 type: integrated-gpu name: Intel UHD
    Graphics (CML GT2) driver: mesa intel v: 24.1.6-arch1.1
    device-ID: 8086:9bc4 surfaces: xcb,xlib
Audio:
  Device-1: Intel Comet Lake PCH cAVS vendor: Lenovo
    driver: sof-audio-pci-intel-cnl alternate: snd_hda_intel, snd_soc_skl,
    snd_sof_pci_intel_cnl bus-ID: 00:1f.3 chip-ID: 8086:06c8 class-ID: 0401
  Device-2: NVIDIA vendor: Lenovo driver: snd_hda_intel v: kernel pcie:
    gen: 3 speed: 8 GT/s lanes: 16 bus-ID: 01:00.1 chip-ID: 10de:10fa
    class-ID: 0403
  Device-3: Lenovo ThinkPad Thunderbolt 3 Dock USB Audio
    driver: hid-generic,snd-usb-audio,usbhid type: USB rev: 2.0 speed: 12 Mb/s
    lanes: 1 mode: 1.1 bus-ID: 5-2.1.1.2:8 chip-ID: 17ef:30cf class-ID: 0300
    serial: <filter>
  API: ALSA v: k6.6.47-1-MANJARO status: kernel-api with: aoss
    type: oss-emulator tools: alsactl,alsamixer,amixer
  Server-1: JACK v: 1.9.22 status: off tools: N/A
  Server-2: PipeWire v: 1.2.3 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: Intel Comet Lake PCH CNVi WiFi driver: iwlwifi v: kernel
    bus-ID: 00:14.3 chip-ID: 8086:06f0 class-ID: 0280
  IF: wlp0s20f3 state: up mac: <filter>
  IP v4: <filter> type: dynamic noprefixroute scope: global
    broadcast: <filter>
  IP v6: <filter> type: noprefixroute scope: link
  Device-2: Lenovo ThinkPad TBT 3 Dock driver: r8152 type: USB rev: 3.0
    speed: 5 Gb/s lanes: 1 mode: 3.2 gen-1x1 bus-ID: 6-2.1.2:4
    chip-ID: 17ef:3082 class-ID: 0000 serial: <filter>
  IF: enp9s0u2u1u2 state: up speed: 1000 Mbps duplex: full mac: <filter>
  IP v4: <filter> type: dynamic noprefixroute scope: global
    broadcast: <filter>
  IP v6: <filter> type: noprefixroute scope: link
  Info: services: NetworkManager, systemd-timesyncd, wpa_supplicant
  WAN IP: <filter>
Bluetooth:
  Device-1: Intel AX201 Bluetooth driver: btusb v: 0.8 type: USB rev: 2.0
    speed: 12 Mb/s lanes: 1 mode: 1.1 bus-ID: 1-14:4 chip-ID: 8087:0026
    class-ID: e001
  Report: rfkill ID: hci0 rfk-id: 1 state: up address: see --recommends
Logical:
  Message: No logical block device data found.
RAID:
  Message: No RAID data found.
Drives:
  Local Storage: total: 1.39 TiB used: 1.15 TiB (82.7%)
  SMART Message: Required tool smartctl not installed. Check --recommends
  ID-1: /dev/nvme0n1 maj-min: 259:0 vendor: Intel model: SSDPEKNW010T8
    size: 953.87 GiB block-size: physical: 512 B logical: 512 B speed: 31.6 Gb/s
    lanes: 4 tech: SSD serial: <filter> fw-rev: 002C temp: 35.9 C scheme: GPT
  ID-2: /dev/nvme1n1 maj-min: 259:2 vendor: Samsung
    model: SSD 970 EVO Plus 500GB size: 465.76 GiB block-size: physical: 512 B
    logical: 512 B speed: 31.6 Gb/s lanes: 4 tech: SSD serial: <filter>
    fw-rev: 2B2QEXM7 temp: 49.9 C scheme: GPT
  Message: No optical or floppy data found.
Partition:
  ID-1: / raw-size: 387.34 GiB size: 380.2 GiB (98.16%) used: 28.92 GiB (7.6%)
    fs: ext4 dev: /dev/nvme1n1p3 maj-min: 259:5 label: System
    uuid: 849a1a22-3296-4110-9f4b-6d3b1f9bca88
  ID-2: /boot/efi raw-size: 300 MiB size: 299.4 MiB (99.80%)
    used: 41.3 MiB (13.8%) fs: vfat dev: /dev/nvme1n1p1 maj-min: 259:3
    label: EFI uuid: C91E-38C2
  ID-3: /home raw-size: 953.86 GiB size: 937.82 GiB (98.32%)
    used: 635.03 GiB (67.7%) fs: ext4 dev: /dev/nvme0n1p1 maj-min: 259:1
    label: Home uuid: 780f7a6e-f521-4bd2-86e1-eaaefe2d49ca
  ID-4: /home/<filter>/pCloudDrive raw-size: N/A size: 2 TiB
    used: 509.08 GiB (24.9%) fs: fuse source: ERR-102
  ID-5: /mnt/NAS/diego raw-size: N/A size: 20.61 TiB used: 3.45 TiB (16.7%)
    fs: nfs4 remote: 172.26.155.8:/mnt/Raid/Diego
  ID-6: /mnt/NAS/music raw-size: N/A size: 17.48 TiB used: 332.47 GiB (1.9%)
    fs: nfs4 remote: 172.26.155.8:/mnt/Raid/Musique
  ID-7: /mnt/NAS/photos raw-size: N/A size: 17.25 TiB used: 94.52 GiB (0.5%)
    fs: nfs4 remote: 172.26.155.8:/mnt/Raid/Photos
  ID-8: /mnt/NAS/plex raw-size: N/A size: 16.3 TiB used: 9.88 TiB (60.6%)
    fs: nfs remote: 172.26.155.4:/nfs/Plex
Swap:
  Kernel: swappiness: 60 (default) cache-pressure: 100 (default) zswap: yes
    compressor: zstd max-pool: 20%
  ID-1: swap-1 type: partition size: 78.12 GiB used: 1.09 GiB (1.4%)
    priority: -2 dev: /dev/nvme1n1p2 maj-min: 259:4 label: Swap
    uuid: ea2c1d35-19a5-4ad4-83ab-f808075f8261
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
  Device-1: 1-8:2 info: IMC Networks Integrated Camera type: video
    driver: uvcvideo interfaces: 5 rev: 2.0 speed: 480 Mb/s (57.2 MiB/s)
    lanes: 1 mode: 2.0 power: 500mA chip-ID: 13d3:5405 class-ID: fe01
    serial: <filter>
  Device-2: 1-9:3 info: Synaptics Prometheus MIS Touch Fingerprint Reader
    type: <vendor specific> driver: N/A interfaces: 1 rev: 2.0
    speed: 12 Mb/s (1.4 MiB/s) lanes: 1 mode: 1.1 power: 100mA
    chip-ID: 06cb:00bd class-ID: ff00 serial: <filter>
  Device-3: 1-14:4 info: Intel AX201 Bluetooth type: bluetooth driver: btusb
    interfaces: 2 rev: 2.0 speed: 12 Mb/s (1.4 MiB/s) lanes: 1 mode: 1.1
    power: 100mA chip-ID: 8087:0026 class-ID: e001
  Hub-2: 2-0:1 info: super-speed hub ports: 10 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-3: 3-0:1 info: hi-speed hub with single TT ports: 2 rev: 2.0
    speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 chip-ID: 1d6b:0002
    class-ID: 0900
  Hub-4: 4-0:1 info: super-speed hub ports: 2 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-5: 5-0:1 info: hi-speed hub with single TT ports: 2 rev: 2.0
    speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 chip-ID: 1d6b:0002
    class-ID: 0900
  Hub-6: 5-2:2 info: Lenovo USB2.0 Hub ports: 5 rev: 2.1
    speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 chip-ID: 17ef:3080
    class-ID: 0900
  Hub-7: 5-2.1:3 info: Lenovo USB2.0 Hub ports: 4 rev: 2.1
    speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 chip-ID: 17ef:3080
    class-ID: 0900
  Hub-8: 5-2.1.1:6 info: Lenovo USB2.0 HUB ports: 2 rev: 2.0
    speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 power: 100mA
    chip-ID: 17ef:3081 class-ID: 0900
  Device-1: 5-2.1.1.2:8 info: Lenovo ThinkPad Thunderbolt 3 Dock USB Audio
    type: audio,HID driver: hid-generic,snd-usb-audio,usbhid interfaces: 4
    rev: 2.0 speed: 12 Mb/s (1.4 MiB/s) lanes: 1 mode: 1.1 power: 30mA
    chip-ID: 17ef:30cf class-ID: 0300 serial: <filter>
  Hub-9: 5-2.2:4 info: Genesys Logic Hub ports: 4 rev: 2.0
    speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 power: 100mA
    chip-ID: 05e3:0608 class-ID: 0900
  Hub-10: 5-2.2.4:7 info: Genesys Logic Hub ports: 4 rev: 2.0
    speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 power: 100mA
    chip-ID: 05e3:0608 class-ID: 0900
  Device-1: 5-2.5:5 info: VIA Labs 40AN type: billboard driver: N/A
    interfaces: 1 rev: 2.0 speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0
    power: 100mA chip-ID: 2109:8887 class-ID: 1100 serial: <filter>
  Hub-11: 6-0:1 info: super-speed hub ports: 2 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-12: 6-2:2 info: Lenovo USB3.1 Hub ports: 4 rev: 3.1
    speed: 10 Gb/s (1.16 GiB/s) lanes: 1 mode: 3.2 gen-2x1 chip-ID: 17ef:307f
    class-ID: 0900
  Hub-13: 6-2.1:3 info: Lenovo USB3.1 Hub ports: 4 rev: 3.1
    speed: 10 Gb/s (1.16 GiB/s) lanes: 1 mode: 3.2 gen-2x1 chip-ID: 17ef:307f
    class-ID: 0900
  Device-1: 6-2.1.2:4 info: Lenovo ThinkPad TBT 3 Dock type: Network
    driver: r8152 interfaces: 1 rev: 3.0 speed: 5 Gb/s (596.0 MiB/s) lanes: 1
    mode: 3.2 gen-1x1 power: 288mA chip-ID: 17ef:3082 class-ID: 0000
    serial: <filter>
Sensors:
  System Temperatures: cpu: 51.0 C mobo: 50.0 C
  Fan Speeds (rpm): fan-1: 2582 fan-2: 2381
Repos:
  Packages: 1588 pm: pacman pkgs: 1579 libs: 413 tools: pamac pm: flatpak
    pkgs: 9
  Active pacman repo servers in: /etc/pacman.d/mirrorlist
    1: https://ftp.lysator.liu.se/pub/manjaro/stable/$repo/$arch
    2: https://mirror.leitecastro.com/manjaro/stable/$repo/$arch
    3: https://mirror.zetup.net/manjaro/stable/$repo/$arch
    4: https://mirror.yandex.ru/mirrors/manjaro/stable/$repo/$arch
    5: https://coresite.mm.fcix.net/manjaro/stable/$repo/$arch
    6: https://ridgewireless.mm.fcix.net/manjaro/stable/$repo/$arch
    7: http://manjaro.mirror.ac.za/stable/$repo/$arch
    8: https://mirror.ufam.edu.br/manjaro/stable/$repo/$arch
Processes:
  CPU top: 5 of 340
  1: cpu: 100% command: ps pid: 11302 mem: 3.33 MiB (0.0%)
  2: cpu: 17.7% command: firefox pid: 1777 mem: 559.5 MiB (0.8%)
  3: cpu: 9.6% command: firefox pid: 8426 mem: 362.2 MiB (0.5%)
  4: cpu: 8.5% command: firefox pid: 9961 mem: 278.5 MiB (0.4%)
  5: cpu: 5.7% command: konsole pid: 11200 mem: 213.8 MiB (0.3%)
  Memory top: 5 of 340
  1: mem: 1986.7 MiB (3.1%) command: plasmashell pid: 1091 cpu: 2.9%
  2: mem: 782.2 MiB (1.2%) command: soffice.bin pid: 7102 cpu: 1.8%
  3: mem: 559.5 MiB (0.8%) command: firefox pid: 1777 cpu: 17.7%
  4: mem: 452.3 MiB (0.7%) command: baloo_file_extractor pid: 1538 cpu: 4.8%
  5: mem: 421.0 MiB (0.6%) command: firefox pid: 1991 cpu: 1.5%
Info:
  Processes: 340 Power: uptime: 1h 40m states: freeze,mem,disk suspend: deep
    avail: s2idle wakeups: 0 hibernate: platform avail: shutdown, reboot,
    suspend, test_resume image: 24.97 GiB services: org_kde_powerdevil,
    power-profiles-daemon, upowerd Init: systemd v: 256 default: graphical
    tool: systemctl
  Compilers: clang: 18.1.8 gcc: 14.2.1 Shell: Zsh v: 5.9 default: Bash
    v: 5.2.32 running-in: konsole inxi: 3.3.36
boltctl                                                                                                                                            ✔ 
 ● Lenovo ThinkPad Thunderbolt 3 Dock
   ├─ type:          peripheral
   ├─ name:          ThinkPad Thunderbolt 3 Dock
   ├─ vendor:        Lenovo
   ├─ uuid:          00a401a9-7426-0801-ffff-ffffffffffff
   ├─ generation:    Thunderbolt 3
   ├─ status:        authorized
   │  ├─ domain:     c7010000-0072-7c0e-8376-fb8a26313202
   │  ├─ rx speed:   40 Gb/s = 2 lanes * 20 Gb/s
   │  ├─ tx speed:   40 Gb/s = 2 lanes * 20 Gb/s
   │  └─ authflags:  boot
   ├─ authorized:    sam 14 sep 2024 08:55:50
   ├─ connected:     sam 14 sep 2024 08:55:50
   └─ stored:        jeu 29 aoû 2024 13:54:03
      ├─ policy:     iommu
      └─ key:        no

mhwd -li                                                                                                                                           ✔ 
> Installed PCI configs:
--------------------------------------------------------------------------------
                  NAME               VERSION          FREEDRIVER           TYPE
--------------------------------------------------------------------------------
     video-modesetting            2020.01.13                true            PCI
           video-linux            2024.05.06                true            PCI
video-hybrid-intel-nvidia-prime            2023.03.23               false            PCI


Warning: No installed USB configs!
lsb_release -sirc                                                                                                                                  ✔ 
ManjaroLinux 24.0.8 Wynsdey

This is most likely your power configuration which cuts power to the USB-C/Thunderbolt port.

1 Like

Do you mean the “stop charging at xx%, start charging at xx%”? (I’ve set to default to check)

[edit] nope, same problem with power config to default

So Thunderbolt is just USB, right? Then it must be autosuspending which is enabled by default. Take a look here: USB — TLP 1.6.1 documentation

This one’s inspiring me, let’s try.

USB_AUTOSUSPEND=0 unfortunately doesn’t solve the issue.

All this drives me to very probable hardware problem :cry:

Does your manufacturer supply firmware updates through fwupd? Or you just ran it?

I also didnt see mention of the archwiki page, which has a few notes and other possible things to try like ‘force power on’.

https://wiki.archlinux.org/title/Thunderbolt

Yep, there was a bunch of fw updates, including one correctiing “thuderbolt power glitches”, witch trigged a huge hope… But no.

I’ll have a look to archwiki, thanks for pointing.

Adding a direct charger connected to the power plug of the laptop solved the issue, this cable looks to be mandatory

tl;dr

After so many investigations, it happens to be only a power supply problem: My Levovo P1 Gen2 laptop used to work and charge with the power supplied by the Thunderbolt4/USB-C cable (90W max as far as my reading are correct).

For some unidentified reason, one day, the 90W where not enough anymore, and I experienced those Thunderbolt interface drops (video, sound and network).

I then saw that Lenovo sells a very strange power+thunderbolt cable and decided to give a try: it solved the problem.

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