chili555
October 29th, 2018, 09:26 PM
Thank you for your reply. Unfortunately (and my apologies) with my limited Linux experience, I don't know how to use a "regular kernel" nor how to use it in conjunction with installing this driver. If you could provide me with the actual sequence order of terminal commands that I need to specify the "regular" kernel and then the order of commands to make, compile, and install that would be great. Thanks!It appears that you installed kernel version 4.19 in a hope to make progress here:
make ARCH=x86_64 CROSS_COMPILE= -C /lib/modules/4.19.0-041900-generic/build M=/home/ed/Downloads/rtl8821CU modulesReboot; interrupt the boot process to get to the GRUB menu, select Advanced Options and boot into a mainline Ubuntu kernel, likely 4.18.0-10-generic if you are running Ubuntu 18.10 or 4.15.0-3xx if you are running Ubuntu 18.04. http://tipsonubuntu.com/wp-content/uploads/2015/03/grub-advanced.jpg
The git I referenced above builds with a few warnings but no errors in my 4.18 system. I've confirmed that the driver does cover your device:
$ modinfo 8821cu.ko | grep C811
alias: usb:v0BDApC811d*dc*dsc*dp*icFFiscFFipFFin*After you boot into the earlier kernel, make clean, make and sudo make install and let us hear the result.
For the benefit of you and the searchers, "~ I'm noticing in many internet related posts that users are advising to go to "System Settings", "Additional Drivers" and that I "Activate" the driver and the OS will automatically install the proprietary driver." If and only if your device is a Broadcom.
You and most Linux newbies probably don't realize that Broadcom drivers are prorietary; that is, not open source, not reviewable by ordinary users and certainly not revisable.
On the other hand, the Realtek driver I refer to above is open source. You and I may see and change the code all we want. Here is a partial copy and paste from the git I referenced above.
/************************************************** ****************************
*
* Copyright(c) 2007 - 2011 Realtek Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
*
*
************************************************** ****************************/
#define _HCI_INTF_C_
#include <drv_types.h>
#include <hal_data.h>
#include <platform_ops.h>
#ifndef CONFIG_USB_HCI
#error "CONFIG_USB_HCI shall be on!\n"
#endif
<snip>
Is short, Additional Drivers did not install a proprietary driver because none is available.