Hi! On my machine r8152 module loading takes about one minute. Its a Debian Sid: uname -a Linux pc 6.5.0-2-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.5.6-1 (2023-10- 07) x86_64 GNU/Linux dmesg: [ 899.522306] usbcore: registered new device driver r8152-cfgselector [ 899.601295] r8152-cfgselector 2-1.3: reset SuperSpeed USB device number 4 using xhci_hcd [ 927.789526] r8152 2-1.3:1.0: firmware: direct-loading firmware rtl_nic/rtl8156b-2.fw [ 942.033905] r8152 2-1.3:1.0: load rtl8156b-2 v2 04/27/23 successfully [ 956.269444] ------------[ cut here ]------------ [ 956.269447] WARNING: CPU: 7 PID: 211 at drivers/net/usb/r8152.c:7668 r8156b_hw_phy_cfg+0x1417/0x1430 [r8152] [ 956.269458] Modules linked in: r8152(+) hid_logitech_hidpp uhid ccm rfcomm cmac algif_hash algif_skcipher af_alg snd_seq_dummy snd_hrtimer snd_seq qrtr openvswitch nsh nf_conncount nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 bnep binfmt_misc nls_ascii nls_cp437 vfat fat snd_ctl_led snd_soc_skl_hda_dsp snd_soc_intel_hda_dsp_common snd_sof_probes snd_soc_hdac_hdmi x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic ledtrig_audio kvm iwlmvm snd_soc_dmic snd_sof_pci_intel_tgl snd_sof_intel_hda_common btusb btrtl btbcm soundwire_intel btintel btmtk irqbypass soundwire_generic_allocation mac80211 mei_pxp mei_wdt mei_hdcp snd_sof_intel_hda_mlink bluetooth ghash_clmulni_intel soundwire_cadence snd_sof_intel_hda snd_sof_pci pmt_telemetry pmt_class intel_rapl_msr snd_sof_xtensa_dsp snd_sof libarc4 aesni_intel snd_sof_utils snd_soc_hdac_hda snd_hda_ext_core snd_soc_acpi_intel_match snd_soc_acpi crypto_simd snd_soc_core cryptd iwlwifi sha3_generic [ 956.269502] jitterentropy_rng rapl snd_compress soundwire_bus sha512_ssse3 snd_hda_intel iTCO_wdt intel_cstate intel_pmc_bxt sha512_generic snd_intel_dspcfg hp_wmi iTCO_vendor_support snd_intel_sdw_acpi intel_uncore cfg80211 platform_profile snd_usb_audio snd_hda_codec ctr pcspkr watchdog snd_hda_core mei_me drbg wmi_bmof snd_usbmidi_lib ansi_cprng snd_hwdep snd_rawmidi mei ecdh_generic uvcvideo snd_seq_device snd_pcm videobuf2_vmalloc uvc videobuf2_memops hid_sensor_incl_3d videobuf2_v4l2 hid_sensor_magn_3d hid_sensor_als hid_sensor_rotation hid_sensor_accel_3d hid_sensor_gyro_3d rfkill snd_timer hid_sensor_trigger videobuf2_common snd hid_sensor_iio_common ecc processor_thermal_device_pci_legacy industrialio_triggered_buffer kfifo_buf processor_thermal_device soundcore industrialio processor_thermal_rfim processor_thermal_mbox ucsi_acpi typec_ucsi processor_thermal_rapl roles intel_vsec intel_rapl_common intel_soc_dts_iosf igen6_edac typec int3403_thermal soc_button_array int340x_thermal_zone int3400_thermal [ 956.269530] intel_hid acpi_pad intel_pmc_core ac acpi_thermal_rel sparse_keymap joydev hid_multitouch serio_raw evdev squashfs msr videodev mc parport_pc ppdev lp parport dm_mod loop efi_pstore configfs ip_tables x_tables autofs4 ext4 crc16 mbcache jbd2 efivarfs raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c crc32c_generic raid1 raid0 multipath linear md_mod virtiofs virtio_ring fuse virtio cdc_ncm cdc_ether usbnet hid_jabra hid_sensor_custom hid_sensor_hub intel_ishtp_hid mii i915 drm_buddy i2c_algo_bit drm_display_helper wacom usbhid cec hid_generic rc_core nvme nvme_core ttm xhci_pci t10_pi drm_kms_helper xhci_hcd crc64_rocksoft crc64 crc_t10dif iosm crct10dif_generic i2c_hid_acpi crc32_pclmul crct10dif_pclmul intel_ish_ipc intel_lpss_pci i2c_i801 crc32c_intel drm usbcore thunderbolt i2c_smbus intel_lpss intel_ishtp wwan crct10dif_common vmd idma64 usb_common i2c_hid battery hid video wmi button [last unloaded: r8152] [ 956.269572] CPU: 7 PID: 211 Comm: kworker/7:2 Tainted: G W 6.5.0-2-amd64 #1 Debian 6.5.6-1 [ 956.269574] Hardware name: HP HP EliteBook x360 1040 G8 Notebook PC/8720, BIOS T93 Ver. 01.14.00 06/26/2023 [ 956.269575] Workqueue: events_long rtl_hw_phy_work_func_t [r8152] [ 956.269580] RIP: 0010:r8156b_hw_phy_cfg+0x1417/0x1430 [r8152] [ 956.269584] Code: be 00 a4 00 00 48 89 df 81 e2 ff f7 00 00 e8 00 49 ff ff e9 a3 ec ff ff be 01 00 00 00 48 89 df e8 ae 6d ff ff e9 eb f0 ff ff <0f> 0b e9 b5 ec ff ff e8 5d 7e e1 d3 66 66 2e 0f 1f 84 00 00 00 00 [ 956.269585] RSP: 0018:ffffac368073bde0 EFLAGS: 00010293 [ 956.269586] RAX: 0000000000000000 RBX: ffffa0c848d939c0 RCX: 0000000000000000 [ 956.269587] RDX: 0000000000000000 RSI: 0000000000000246 RDI: 0000000000000000 [ 956.269588] RBP: ffffa0c848d93da8 R08: 0000000000000000 R09: 0000000000000000 [ 956.269589] R10: 0000000000000001 R11: 0000000000000000 R12: ffffa0c848d939c0 [ 956.269589] R13: ffffac368023cc50 R14: ffffa0c8a3ab3360 R15: 0000000000001c50 [ 956.269590] FS: 0000000000000000(0000) GS:ffffa0cfcf9c0000(0000) knlGS:0000000000000000 [ 956.269591] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 956.269592] CR2: 00007fbc793e5000 CR3: 00000001ddd70002 CR4: 0000000000f70ee0 [ 956.269593] PKRU: 55555554 [ 956.269593] Call Trace: [ 956.269595] <TASK> [ 956.269596] ? r8156b_hw_phy_cfg+0x1417/0x1430 [r8152] [ 956.269600] ? __warn+0x81/0x130 [ 956.269605] ? r8156b_hw_phy_cfg+0x1417/0x1430 [r8152] [ 956.269609] ? report_bug+0x191/0x1c0 [ 956.269613] ? handle_bug+0x3c/0x80 [ 956.269615] ? exc_invalid_op+0x17/0x70 [ 956.269617] ? asm_exc_invalid_op+0x1a/0x20 [ 956.269620] ? r8156b_hw_phy_cfg+0x1417/0x1430 [r8152] [ 956.269624] rtl_hw_phy_work_func_t+0x263/0xf50 [r8152] [ 956.269629] process_one_work+0x1de/0x3f0 [ 956.269632] worker_thread+0x51/0x390 [ 956.269633] ? _raw_spin_lock_irqsave+0x27/0x60 [ 956.269635] ? __pfx_worker_thread+0x10/0x10 [ 956.269637] kthread+0xf4/0x130 [ 956.269639] ? __pfx_kthread+0x10/0x10 [ 956.269640] ret_from_fork+0x31/0x50 [ 956.269643] ? __pfx_kthread+0x10/0x10 [ 956.269645] ret_from_fork_asm+0x1b/0x30 [ 956.269648] </TASK> [ 956.269648] ---[ end trace 0000000000000000 ]--- [ 966.304141] r8152 2-1.3:1.0: PHY patch request fail [ 966.304935] r8152 2-1.3:1.0 eth0: v1.12.13 [ 966.304983] usbcore: registered new interface driver r8152 Which in my case points to line 7668: (gdb) l *(r8156b_hw_phy_cfg+0x1417) 0x12577 is in r8156b_hw_phy_cfg (drivers/net/usb/r8152.c:7668). 7663 7664 /* disable EEE before updating the PHY parameters */ 7665 rtl_eee_enable(tp, false); 7666 7667 data = r8153_phy_status(tp, PHY_STAT_LAN_ON); 7668 WARN_ON_ONCE(data != PHY_STAT_LAN_ON); 7669 7670 ocp_data = ocp_read_word(tp, MCU_TYPE_PLA, PLA_PHY_PWR); 7671 ocp_data |= PFM_PWM_SWITCH; 7672 ocp_write_word(tp, MCU_TYPE_PLA, PLA_PHY_PWR, ocp_data); Thanks, Ferenc