Arch Linux User Repository

To all having an issue with this driver: please try https://aur.archlinux.org/packages/rtl88xxau-aircrack-dkms-git alternatively.

a patch to make it work for rpi and may be other ARM device:

--- PKGBUILD.old    2019-03-15 20:08:05.345042676 +0100
+++ PKGBUILD    2019-03-15 20:04:24.390294977 +0100
@@ -32,4 +32,10 @@
         sed -e "s/@_PKGBASE@/${_pkgbase}-dkms/" \
                         -e "s/@PKGVER@/${pkgver}/" \
                         -i "${pkgdir}"/usr/src/${_pkgbase}-${pkgver}/dkms.conf
+
+   # patch Makefile for RPI
+   sed -i '/^CONFIG_PLATFORM_I386_PC/s/y/n/' ${pkgdir}/usr/src/${_pkgbase}-${pkgver}/Makefile
+   sed -i '/^CONFIG_PLATFORM_ARM_RPI/s/n/y/' ${pkgdir}/usr/src/${_pkgbase}-${pkgver}/Makefile
+   # disable debug code with __DATE__ macro (TODO: proper fix ?)
+   sed -i '/__DATE__/s/^/\/\//' ${pkgdir}/usr/src/${_pkgbase}-${pkgver}/core/rtw_debug.c
 }

Note: I am seeing the interface of the usb wifi key marketed as DEEPOW dongle (from amazon) changing MAC address at every boot even though I have not set up anything like that in netctl, here.

I don't know if it's a hardware problem or driver problem. However, it's the same with rtl88xxau-aircrack-dkms-git driver

I have updated the package to 5.8.2.3 as recommended. Please let me know if this works - and if there is any advantage over the aircrack version.

Just received an Orphan request from leo95: as requested I can update the source to using https://github.com/morrownr/8821au as recommended, but this is different from an Orphan. Please let me know if you would like to maintain this.

@zebulon rtl8821au was the first module that I have tried for my usb wifi adapter. It stopped working after latest system upgrade. Unfortunately don't remember where and how I found that rtl8821au is compatible with my device.

@Casper: thanks for reporting. This makes me think that this package should probably be now deprecated and users of rtl8821au should use now the aircrack version. I will add a note on the Wiki about rtl8821cu devices. Can you confirm that your device is mislabelled rtl8821au? In other words, what made you think you needed 8821au driver?

@zebulon, thank you very much. With the patch works perfectly.

@Casper: for the brektrou driver, there is a patch bringing compatibility with 5.12: https://github.com/brektrou/rtl8821CU/pull/134/commits/d4a3d37441a3a17064eeebada09c30c264b44b23. Until it is approved and merged, you need to patch those sources yourself.

@Casper: see also https://askubuntu.com/questions/1162974/wireless-usb-adapter-0bdac811-realtek-semiconductor-corp for a discussion about 8821cu. By the way, there is a PKGBUILD on AUR for the brektrou driver: https://aur.archlinux.org/packages/rtl8821cu-dkms-git/

@Casper: I see your Device ID in the Github Issue report: 0bda:c811. Seems that from reading https://github.com/aircrack-ng/rtl8812au/issues/721 you may have an RTL8821CU. Can you look if: https://github.com/ulli-kroll/rtl8821cu or https://github.com/brektrou/rtl8821CU compile and work for you?

@Casper: it looks like the API has changed with 5.12 version of the kernel and therefore does not compile. Very strange the aircrack driver does not work either - this would have simplified the problem. Maybe you could raise a ticket in aircrack Github repo while I try to fix this? Maybe this is just an ID missing in aircrack code? Do you know your device ID ? In addition I do not own a 8821au adapter, making fixing quite difficult.

Unable to compile. Also created an issues in github: https://github.com/zebulon2/rtl8812au/issues/36.

Unfortunately my usb wi-fi adapter works only with this driver, it doesn't appear with rtl88xxau-aircrack.

CC [M]  /home/casper/build/rtl8812au/core/efuse/rtw_efuse.o
/home/casper/build/rtl8812au/core/efuse/rtw_efuse.c: In function ‘rtw_read_efuse_from_file’:
/home/casper/build/rtl8812au/core/efuse/rtw_efuse.c:2565:14: error: implicit declaration of function ‘get_fs’; did you mean ‘get_sa’? [-Werror=implicit-function-declaration]
 2565 |         fs = get_fs();
      |              ^~~~~~
      |              get_sa
/home/casper/build/rtl8812au/core/efuse/rtw_efuse.c:2565:14: error: incompatible types when assigning to type ‘mm_segment_t’ from type ‘int’
/home/casper/build/rtl8812au/core/efuse/rtw_efuse.c:2566:9: error: implicit declaration of function ‘set_fs’; did you mean ‘sget_fc’? [-Werror=implicit-function-declaration]
 2566 |         set_fs(KERNEL_DS);
      |         ^~~~~~
      |         sget_fc
/home/casper/build/rtl8812au/core/efuse/rtw_efuse.c:2566:16: error: ‘KERNEL_DS’ undeclared (first use in this function); did you mean ‘KERNFS_NS’?
 2566 |         set_fs(KERNEL_DS);
      |                ^~~~~~~~~
      |                KERNFS_NS
/home/casper/build/rtl8812au/core/efuse/rtw_efuse.c:2566:16: note: each undeclared identifier is reported only once for each function it appears in
/home/casper/build/rtl8812au/core/efuse/rtw_efuse.c: In function ‘rtw_read_macaddr_from_file’:
/home/casper/build/rtl8812au/core/efuse/rtw_efuse.c:2646:14: error: incompatible types when assigning to type ‘mm_segment_t’ from type ‘int’
 2646 |         fs = get_fs();
      |              ^~~~~~
/home/casper/build/rtl8812au/core/efuse/rtw_efuse.c:2647:16: error: ‘KERNEL_DS’ undeclared (first use in this function); did you mean ‘KERNFS_NS’?
 2647 |         set_fs(KERNEL_DS);
      |                ^~~~~~~~~
      |                KERNFS_NS
cc1: some warnings being treated as errors
make[2]: *** [scripts/Makefile.build:271: /home/casper/build/rtl8812au/core/efuse/rtw_efuse.o] Error 1
make[1]: *** [Makefile:1851: /home/casper/build/rtl8812au] Error 2
make[1]: Leaving directory '/usr/lib/modules/5.12.4-arch1-2/build'
make: *** [Makefile:1870: modules] Error 2