TX20U Plus appears to become unresponsive when given a workout

[doriantaylor]

Hi there, just bought a TP-Link TX20U Plus (USB ID 2537:013f) and trying to get it running with this driver (on Ubuntu 23.10 using dkms), though noticing weird behaviour:

• status LED never lights up,
• systemd seems to trip over systemd-networkd-wait-online.service on startup when it is plugged in,
• appears to choke and becomes unresponsive when you pump traffic through it, and won't work again without a reboot.

I'm just giving a gloss here because at this juncture I'm trying to determine if it's the hardware itself that's a dud.

For one, is there a reason, while using this driver, to expect the status light not to come on? Because it never has. Also, when it finally boots, I see an error on the console index 9 is out of range for u8 [8]. Is that normal?

Note: I am using this device with hostapd on an old Dell laptop, if that makes any difference, but I tried it on a new Framework laptop as well and it behaved the same (i.e., no status LED).

Any insight is appreciated; if it's not obviously a hardware issue I can go dig out the logs. Thanks in advance.

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Updated with kernel log excerpt:

2024-04-14T07:42:26.972699-04:00 deuce kernel: [  197.926894] ================================================================================
2024-04-14T07:42:26.972752-04:00 deuce kernel: [  197.927056] UBSAN: array-index-out-of-bounds in /var/lib/dkms/rtl8852au/1.15.0.1/build/phl/hal_g6/mac/mac_ax/trx_desc.c:184:3
2024-04-14T07:42:26.972783-04:00 deuce kernel: [  197.927182] index 9 is out of range for type 'u8 [8]'
2024-04-14T07:42:26.977130-04:00 deuce kernel: [  197.927243] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G           OE      6.5.0-27-generic #28-Ubuntu
2024-04-14T07:42:26.977165-04:00 deuce kernel: [  197.927254] Hardware name: Dell Inc. Inspiron 1420                   /0DT492, BIOS A00 05/23/2007
2024-04-14T07:42:26.977172-04:00 deuce kernel: [  197.927259] Call Trace:
2024-04-14T07:42:26.977179-04:00 deuce kernel: [  197.927266]  <IRQ>
2024-04-14T07:42:26.977187-04:00 deuce kernel: [  197.927274]  dump_stack_lvl+0x48/0x70
2024-04-14T07:42:26.977193-04:00 deuce kernel: [  197.927297]  dump_stack+0x10/0x20
2024-04-14T07:42:26.977200-04:00 deuce kernel: [  197.927304]  __ubsan_handle_out_of_bounds+0xc6/0x110
2024-04-14T07:42:26.977206-04:00 deuce kernel: [  197.927318]  txdes_proc_data+0x5c7/0x5d0 [8852au]
2024-04-14T07:42:26.977212-04:00 deuce kernel: [  197.927933]  mac_build_txdesc+0x72/0x90 [8852au]
2024-04-14T07:42:26.977218-04:00 deuce kernel: [  197.928478]  rtw_hal_mac_ax_fill_txdesc+0x4c/0x70 [8852au]
2024-04-14T07:42:26.977224-04:00 deuce kernel: [  197.929018]  hal_fill_wd_8852au+0x15/0x30 [8852au]
2024-04-14T07:42:26.977230-04:00 deuce kernel: [  197.929548]  rtw_hal_fill_wd+0x34/0x50 [8852au]
2024-04-14T07:42:26.977238-04:00 deuce kernel: [  197.930104]  _phl_prepare_tx_usb+0x64/0x180 [8852au]
2024-04-14T07:42:26.977244-04:00 deuce kernel: [  197.930636]  _phl_tx_callback_usb+0x233/0x540 [8852au]
2024-04-14T07:42:26.977250-04:00 deuce kernel: [  197.930691]  tasklet_action_common.isra.0+0xfd/0x1e0
2024-04-14T07:42:26.977256-04:00 deuce kernel: [  197.930691]  ? usb_hcd_irq+0x2c/0x50
2024-04-14T07:42:26.977262-04:00 deuce kernel: [  197.930691]  tasklet_hi_action+0x1f/0x30
2024-04-14T07:42:26.977270-04:00 deuce kernel: [  197.930691]  __do_softirq+0xd9/0x346
2024-04-14T07:42:26.977276-04:00 deuce kernel: [  197.930691]  __irq_exit_rcu+0x75/0xa0
2024-04-14T07:42:26.977282-04:00 deuce kernel: [  197.930691]  irq_exit_rcu+0xe/0x20
2024-04-14T07:42:26.977289-04:00 deuce kernel: [  197.930691]  common_interrupt+0xa4/0xb0
2024-04-14T07:42:26.977296-04:00 deuce kernel: [  197.930691]  </IRQ>
2024-04-14T07:42:26.977302-04:00 deuce kernel: [  197.930691]  <TASK>
2024-04-14T07:42:26.977310-04:00 deuce kernel: [  197.930691]  asm_common_interrupt+0x27/0x40
2024-04-14T07:42:26.977316-04:00 deuce kernel: [  197.930691] RIP: 0010:cpuidle_enter_state+0xda/0x730
2024-04-14T07:42:26.977323-04:00 deuce kernel: [  197.930691] Code: e4 03 ff e8 a8 f5 ff ff 8b 53 04 49 89 c7 0f 1f 44 00 00 31 ff e8 66 8d 02 ff 80 7d d0 00 0f 85 61 02 00 00 fb 0f 1f 44 00 00 <45> 85 f6 0f 88 f7 01 00 00 4d 63 ee 49 83 fd 0a 0f 83 17 05 00 00
2024-04-14T07:42:26.977330-04:00 deuce kernel: [  197.930691] RSP: 0018:ffffffff88a03db8 EFLAGS: 00000246
2024-04-14T07:42:26.977337-04:00 deuce kernel: [  197.930691] RAX: 0000000000000000 RBX: ffff8de83c23e528 RCX: 0000000000000000
2024-04-14T07:42:26.977343-04:00 deuce kernel: [  197.930691] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
2024-04-14T07:42:26.977350-04:00 deuce kernel: [  197.930691] RBP: ffffffff88a03e08 R08: 0000000000000000 R09: 0000000000000000
2024-04-14T07:42:26.977357-04:00 deuce kernel: [  197.930691] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff88cd2720
2024-04-14T07:42:26.977363-04:00 deuce kernel: [  197.930691] R13: 0000000000000003 R14: 0000000000000003 R15: 0000002e1559677c
2024-04-14T07:42:26.977370-04:00 deuce kernel: [  197.930691]  ? cpuidle_enter_state+0x33c/0x730
2024-04-14T07:42:26.977379-04:00 deuce kernel: [  197.930691]  cpuidle_enter+0x2e/0x50
2024-04-14T07:42:26.977385-04:00 deuce kernel: [  197.930691]  call_cpuidle+0x23/0x60
2024-04-14T07:42:26.977392-04:00 deuce kernel: [  197.930691]  cpuidle_idle_call+0x11d/0x190
2024-04-14T07:42:26.977398-04:00 deuce kernel: [  197.930691]  do_idle+0x82/0xf0
2024-04-14T07:42:26.977405-04:00 deuce kernel: [  197.930691]  cpu_startup_entry+0x2a/0x30
2024-04-14T07:42:26.977412-04:00 deuce kernel: [  197.930691]  rest_init+0xde/0x100
2024-04-14T07:42:26.977420-04:00 deuce kernel: [  197.930691]  ? acpi_enable_subsystem+0xe6/0x2a0
2024-04-14T07:42:26.977426-04:00 deuce kernel: [  197.930691]  ? static_key_disable+0x1f/0x30
2024-04-14T07:42:26.977433-04:00 deuce kernel: [  197.930691]  arch_call_rest_init+0xe/0x30
2024-04-14T07:42:26.977439-04:00 deuce kernel: [  197.930691]  start_kernel+0x34f/0x440
2024-04-14T07:42:26.977446-04:00 deuce kernel: [  197.930691]  x86_64_start_reservations+0x18/0x30
2024-04-14T07:42:26.977453-04:00 deuce kernel: [  197.930691]  x86_64_start_kernel+0xbf/0x110
2024-04-14T07:42:26.977460-04:00 deuce kernel: [  197.930691]  secondary_startup_64_no_verify+0x190/0x19b
2024-04-14T07:42:26.977466-04:00 deuce kernel: [  197.930691]  </TASK>
2024-04-14T07:42:26.977473-04:00 deuce kernel: [  197.930691] ================================================================================