This appears to be new in 4.19 rc5. But it doesn't happen every boot. Details and attachments in the bug: https://bugzilla.kernel.org/show_bug.cgi?id=201227 [ 35.502605] f29h.local kernel: pci_bus 0000:02: Allocating resources [ 51.172922] f29h.local kernel: thunderbolt 0000:03:00.0: timeout reading config space 1 from 0x1 [ 51.172925] f29h.local kernel: ------------[ cut here ]------------ [ 51.172927] f29h.local kernel: thunderbolt 0000:03:00.0: 0:3: non switch port without a PHY [ 51.172954] f29h.local kernel: WARNING: CPU: 2 PID: 2036 at drivers/thunderbolt/switch.c:594 tb_switch_add+0x69b/0x780 [thunderbolt] [ 51.172955] f29h.local kernel: Modules linked in: hidp vfat fat thunderbolt(+) rfcomm fuse ccm devlink nf_conntrack_netbios_ns nf_conntrack_broadcast xt_CT ip6t_rpfilter ip6t_REJECT nf_reject_ipv6 xt_conntrack ebtable_nat ebtable_broute bridge stp llc ip6table_nat nf_nat_ipv6 ip6table_mangle ip6table_raw ip6table_security iptable_nat nf_nat_ipv4 nf_nat iptable_mangle iptable_raw iptable_security nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ip_set nfnetlink ebtable_filter ebtables ip6table_filter ip6_tables cmac bnep sunrpc arc4 intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp hp_wmi iTCO_wdt kvm_intel iTCO_vendor_support sparse_keymap snd_soc_skl wmi_bmof kvm intel_wmi_thunderbolt snd_soc_skl_ipc iwlmvm snd_soc_sst_ipc snd_soc_sst_dsp snd_hda_ext_core snd_soc_acpi_intel_match snd_soc_acpi snd_soc_core mac80211 [ 51.172987] f29h.local kernel: snd_hda_codec_hdmi snd_compress irqbypass snd_hda_codec_conexant crct10dif_pclmul snd_hda_codec_generic ac97_bus ghash_clmulni_intel snd_pcm_dmaengine intel_cstate snd_hda_intel iwlwifi intel_uncore snd_hda_codec intel_rapl_perf snd_hda_core uvcvideo snd_hwdep btusb snd_seq btrtl snd_seq_device btbcm videobuf2_vmalloc btintel videobuf2_memops videobuf2_v4l2 snd_pcm videobuf2_common cfg80211 bluetooth videodev joydev snd_timer media snd i2c_i801 soundcore idma64 ecdh_generic mei_me mei rfkill intel_pch_thermal intel_lpss_pci intel_lpss processor_thermal_device intel_soc_dts_iosf wmi int3403_thermal int340x_thermal_zone pinctrl_sunrisepoint pinctrl_intel int3400_thermal hp_wireless acpi_thermal_rel acpi_pad pcc_cpufreq crc32_generic crc32_pclmul f2fs dm_crypt btrfs libcrc32c xor zstd_decompress [ 51.173016] f29h.local kernel: zstd_compress xxhash i915 raid6_pq i2c_algo_bit drm_kms_helper nvme crc32c_intel drm nvme_core serio_raw video hid_apple lz4 lz4_compress [ 51.173025] f29h.local kernel: CPU: 2 PID: 2036 Comm: systemd-udevd Not tainted 4.19.0-0.rc5.git0.1.fc30.x86_64 #1 [ 51.173027] f29h.local kernel: Hardware name: HP HP Spectre Notebook/81A0, BIOS F.41 06/15/2018 [ 51.173032] f29h.local kernel: RIP: 0010:tb_switch_add+0x69b/0x780 [thunderbolt] [ 51.173034] f29h.local kernel: Code: 89 4c 24 08 44 89 44 24 04 e8 e1 96 35 d3 44 8b 44 24 04 4c 89 f2 48 8b 4c 24 08 48 89 c6 48 c7 c7 38 e7 29 c1 e8 cf 13 e2 d2 <0f> 0b e9 fc fb ff ff 41 8b 97 ec 02 00 00 41 8b 87 e8 02 00 00 8b [ 51.173035] f29h.local kernel: RSP: 0018:ffffba6904cb3a68 EFLAGS: 00010286 [ 51.173037] f29h.local kernel: RAX: 0000000000000000 RBX: ffff923a44b46098 RCX: 0000000000000006 [ 51.173039] f29h.local kernel: RDX: 0000000000000007 RSI: 0000000000000082 RDI: ffff923ab6b16860 [ 51.173040] f29h.local kernel: RBP: ffffffffc129d68d R08: 0000000000000005 R09: 0000000000000007 [ 51.173041] f29h.local kernel: R10: 0000000000000000 R11: ffffffff959b116d R12: ffffffffc129d695 [ 51.173042] f29h.local kernel: R13: 0000000000000003 R14: ffff923a59d50c68 R15: ffff923a44b464f8 [ 51.173044] f29h.local kernel: FS: 00007f34253cd940(0000) GS:ffff923ab6b00000(0000) knlGS:0000000000000000 [ 51.173045] f29h.local kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 51.173046] f29h.local kernel: CR2: 00007f15b8039228 CR3: 00000002316b4002 CR4: 00000000003606e0 [ 51.173048] f29h.local kernel: Call Trace: [ 51.173054] f29h.local kernel: icm_start+0x59/0xa0 [thunderbolt] [ 51.173059] f29h.local kernel: tb_domain_add+0xa6/0x140 [thunderbolt] [ 51.173064] f29h.local kernel: nhi_probe+0x2be/0x560 [thunderbolt] [ 51.173068] f29h.local kernel: local_pci_probe+0x41/0x90 [ 51.173071] f29h.local kernel: pci_device_probe+0x188/0x1a0 [ 51.173074] f29h.local kernel: really_probe+0x235/0x3a0 [ 51.173076] f29h.local kernel: driver_probe_device+0xb3/0xf0 [ 51.173079] f29h.local kernel: __driver_attach+0xdd/0x110 [ 51.173081] f29h.local kernel: ? driver_probe_device+0xf0/0xf0 [ 51.173084] f29h.local kernel: bus_for_each_dev+0x76/0xc0 [ 51.173086] f29h.local kernel: ? klist_add_tail+0x3b/0x60 [ 51.173089] f29h.local kernel: bus_add_driver+0x152/0x230 [ 51.173090] f29h.local kernel: ? 0xffffffffc12b0000 [ 51.173093] f29h.local kernel: driver_register+0x6b/0xb0 [ 51.173094] f29h.local kernel: ? 0xffffffffc12b0000 [ 51.173099] f29h.local kernel: nhi_init+0x2b/0x1000 [thunderbolt] [ 51.173103] f29h.local kernel: do_one_initcall+0x46/0x1c3 [ 51.173105] f29h.local kernel: ? do_init_module+0x22/0x210 [ 51.173108] f29h.local kernel: ? kmem_cache_alloc_trace+0x15f/0x1e0 [ 51.173110] f29h.local kernel: do_init_module+0x5a/0x210 [ 51.173113] f29h.local kernel: load_module+0x206d/0x22d0 [ 51.173116] f29h.local kernel: ? __do_sys_init_module+0x13d/0x180 [ 51.173118] f29h.local kernel: __do_sys_init_module+0x13d/0x180 [ 51.173121] f29h.local kernel: do_syscall_64+0x5b/0x160 [ 51.173124] f29h.local kernel: entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 51.173125] f29h.local kernel: RIP: 0033:0x7f3426083f5e [ 51.173127] f29h.local kernel: Code: 48 8b 0d 2d 1f 0c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 49 89 ca b8 af 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d fa 1e 0c 00 f7 d8 64 89 01 48 [ 51.173128] f29h.local kernel: RSP: 002b:00007ffc248b80e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000af [ 51.173130] f29h.local kernel: RAX: ffffffffffffffda RBX: 0000565467470b20 RCX: 00007f3426083f5e [ 51.173132] f29h.local kernel: RDX: 00007f34261f984d RSI: 0000000000045c5e RDI: 00005654674edd00 [ 51.173133] f29h.local kernel: RBP: 00007f34261f984d R08: 0000000000000006 R09: 0000000000000005 [ 51.173134] f29h.local kernel: R10: 0000565467325010 R11: 0000000000000246 R12: 00005654674edd00 [ 51.173135] f29h.local kernel: R13: 00005654674905b0 R14: 0000000000020000 R15: 0000000000000000 [ 51.173137] f29h.local kernel: ---[ end trace 77997381a0d11433 ]--- [ 51.173140] f29h.local kernel: thunderbolt 0000:03:00.0: Port 3: 8086:1578 (Revision: 4, TB Version: 1, Type: Port (0x1)) [ 51.173142] f29h.local kernel: thunderbolt 0000:03:00.0: Max hop id (in/out): 15/15 [ 51.173144] f29h.local kernel: thunderbolt 0000:03:00.0: Max counters: 16 [ 51.173145] f29h.local kernel: thunderbolt 0000:03:00.0: NFC Credits: 0x3c00000 [ 71.652850] f29h.local kernel: thunderbolt 0000:03:00.0: timeout reading config space 1 from 0x0 [ 71.652991] f29h.local kernel: thunderbolt 0000:03:00.0: stopping RX ring 0
