help with 'rtl8812au-dkms' driver for A6100 USB wireless

Questions about WIFI networks and devices
Forum rules
Before you post please read how to get help
Post Reply
User avatar
Level 4
Level 4
Posts: 297
Joined: Sat Feb 20, 2010 4:04 pm
Location: Austin, TX USA

help with 'rtl8812au-dkms' driver for A6100 USB wireless

Post by SaintDanBert »

I recently installed Linux Mint 19.3 Cinnamon Edition and now have troubles with the driver for my Netgear™ A6100 USB wireless/ac adapter module rtl8812au-dkms.

  • at boot, the device is not detected/identified
  • as expected, the module does not get loaded
  • installing the package from Synaptic with reboot still does not detect and load
I get the following:

Code: Select all

prompt$  lsmod  | grep 8812

8812au               1290240  0
cfg80211              704512  4 iwldvm,8812au,iwlwifi,mac80211


and then this:
NOTE -- In the interest of space, I removed the content of repeate usb: and parm: records from the output below.

Code: Select all

prompt$  modinfo 8812au

filename:       /lib/modules/5.3.0-26-generic/updates/dkms/8812au.ko
version:        v4.3.8_12175.20140902
author:         Realtek Semiconductor Corp.
description:    Realtek Wireless Lan Driver
license:        GPL
srcversion:     A1B4B8FF70567B29CF1C971
alias:          usb:v056Ep4007d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v0BDAp8812d*dc*dsc*dp*ic*isc*ip*in*
depends:        cfg80211
retpoline:      Y
name:           8812au
vermagic:       5.3.0-26-generic SMP mod_unload 
signat:         PKCS#7
sig_hashalgo:   md4
parm:           rtw_ips_mode:The default IPS mode (int)
parm:           rtw_decrypt_phy_file:Enable Decrypt PHY File (int)

I notice that this module appears as 8812au instead of rtl8812au. I don't know if that matters somehow. Sadly, (blush) I don't know enough to know how to check if it matters. Logs?

and continuing this:

Code: Select all

prompt$  dmesg 

[87209.177784] 8812au: loading out-of-tree module taints kernel.
[87209.178342] 8812au: module verification failed: signature and/or required key missing - tainting kernel
[87209.180489] RTL871X: module init start
[87209.180491] RTL871X: rtl8812au v4.3.8_12175.20140902
[87209.180491] RTL871X: build time: Jan 21 2020 12:05:54
[87209.180547] ------------[ cut here ]------------
[87209.180591] WARNING: CPU: 2 PID: 8489 at /build/linux-hwe-3HpQOB/linux-hwe-5.3.0/net/wireless/core.c:868 wiphy_register+0x855/0xba0 [cfg80211]
[87209.180592] Modules linked in: 8812au(OE+) ccm rfcomm ipmi_devintf ipmi_msghandler bnep binfmt_misc nls_iso8859_1 intel_rapl_msr intel_rapl_common x
[87209.180644] Call Trace:
[87209.180650]  ? __kmalloc+0x255/0x260
[87209.180684]  ? _rtw_malloc+0x2d/0x2f [8812au]
[87209.180707]  ? _rtw_malloc+0x2d/0x2f [8812au]
[87209.180727]  ? _rtw_memcpy+0x10/0x12 [8812au]
[87209.180750]  ? rtw_5g_rates_init+0x1a/0x1c [8812au]
[87209.180774]  rtw_wdev_alloc+0xf9/0x29f [8812au]
[87209.180797]  ? rtw_wdev_alloc+0xf9/0x29f [8812au]
[87209.180819]  rtw_usb_if1_init+0xf0/0x209 [8812au]
[87209.180840]  rtw_drv_init+0x244/0x2f7 [8812au]
[87209.374518] usbcore: registered new interface driver rtl8812au
[87209.374523] RTL871X: module init ret=0
[89582.811620] perf: interrupt took too long (2555 > 2500), lowering kernel.perf_event_max_sample_rate to 78250
[89900.560991] wlp3s0: deauthenticated from 4c:ed:fb:ad:8e:b4 (Reason: 16=GROUP_KEY_HANDSHAKE_TIMEOUT)
[89903.797137] wlp3s0: authenticate with 4c:ed:fb:ad:8e:b4
and finally:

Code: Select all

prompt$  ls -lh /var/lib/dkms/rtl8812au/

-rw-r--r-- 1 root root 2.4M Jan 21 12:07 /var/lib/dkms/rtl8812au/

Thanks in advance,
~~~ 0;-Dan
All government spending, regardless of the motives, uses YOUR money!
Any government extensive enough to give you anything that you want is also
powerful enough to take everything that you have.

Level 7
Level 7
Posts: 1739
Joined: Thu May 25, 2017 3:22 pm

Re: help with 'rtl8812au-dkms' driver for A6100 USB wireless

Post by sleeper12 »

Not sure, but maybe JeremyB's solution here:
viewtopic.php?f=53&t=309953&p=1747604&h ... u#p1747604

Post Reply

Return to “Wireless”