I recently bought a HP-BW088AX Laptop from Amazon. I initially installed Kali Linux on it because I wanted to learn penetration testing and hacking, but as I was new to Linux I decided to go for a more user-friendly distro. So I dual booted my laptop with Ubuntu.   After I installed Ubuntu I had to face some issues with the inbuilt wireless card. I had faced similar issues with Kali Linux but I got them solved.  The problem was that the OS wasn't detecting the inbuilt wireless card which is a Realtek RTL8723DE chipset. I installed the drivers for it from here , consequently the wireless card was detected but the signal was very weak.  So I started finding a solution on the internet and I found this :    Output of lspci:  03:00.0 Network controller: Realtek Semiconductor Co., Ltd. Device d723   This solution worked for Kali Linux which is also a debian based distro but the same is not working for Ubuntu. But it is not working in Ubuntu. Everything works fine until I run this command :   sudo modprobe -rv rtl8723de ant_sel=2   I get the following output :  modprobe: FATAL: Module ant_sel=2 not found.   I didn't face this issue in Kali Linux.   I have Ubuntu 18.04.02 LTS. Processor : AMD® A9-9420 radeon r5, 5 compute cores 2c+3g × 2  Graphics : AMD® Stoney GNOME : 3.28.2   Any help would be appreciated a lot. Thanks in advance.
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How do I install Wi-Fi drivers for Realtek RTL8723DE device in Ubuntu 16.04?  lspci -v | grep -i network 02:00.0 Network controller: Realtek Semiconductor Co., Ltd. Device d723
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I have to reset my internet connection often to get it to work.  When it does work, it's definitely slower than when I'm on my Windows installation.  My computer uses an RTL8188CE wireless card from Realtek.  I'm running the 64-bit version of Ubuntu 12.10.  Power management is not on.  I've read on other sites that some people fixed the issue pertaining to this wireless card by downloading and installing the drivers from the Realtek site, but it seems as if that only helped people with 32-bit installations.  Anyone have any luck with this specific wireless card?
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We just bought a Lenovo  (which is supposed to have the Intel 8265 for wireless). This laptop was bought in part because it is certified to run Ubuntu and as such to me at least it would make sense for things to work out of the box... but no such luck.  First, I installed Ubuntu 17.10 and after installation realised Wi-Fi was not working. I also tried Ubuntu 16.04 from a USB drive since that is the version of Ubuntu it is certified for, but no luck there either.  The wireless chip is not detected by lshw (or even lspci by the looks of it), ip link does not show a wireless interface, and the iwlwifi kernel module is not loaded at boot (I can load this myself using modprobe iwlwifi but this does not make Wi-Fi work). I think it is a combined Wi-Fi/Bluetooth chip, and Bluetooth does appear to work (or at least Bluetooth shows up in Gnome and rfkill list).  modinfo iwlwifi | grep 8265 shows me a file ending in -34 is supposedly loaded but only a file ending in -33 (and some other lower numbers) is present in /lib/firmware, if that helps).  I have also installed the Linux 4.14.9 kernel in an attempt to get things to work, but this did not resolve the issue either.  Further information  root@ThinkPad-E570:~# modinfo iwlwifi | grep 8265 firmware:       iwlwifi-8265-34.ucode root@ThinkPad-E570:~# rfkill list all 0: tpacpi_bluetooth_sw: Bluetooth     Soft blocked: no     Hard blocked: no 1: hci0: Bluetooth     Soft blocked: no     Hard blocked: no root@ThinkPad-E570:~# dmesg | grep iwl root@ThinkPad-E570:~# lspci -nnk | grep 0280 -A3 05:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. Device [10ec:c821]     Subsystem: Lenovo Device [17aa:c024]   Update  I just noticed that the laptop does not have an Intel wireless chip at all, but in fact has a Realtek one... which means that the  of the shop I bought this laptop at were not accurate... Sigh. Same problem stands, however, just with a crappier wireless chip.
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Please note that this question is specific to Intel WiFi adapters.  My laptop is an HP ENVY with an Intel AX201 Wifi Adapter. I've dualbooted Ubuntu with Windows.  AX201 WiFi adapter is not supported by latest Ubuntu 18.04 version, because Ubuntu 18.04 comes with Linux Kernel 5.0, whereas support for AX201 comes built-in in Linux Kernel 5.2+. Canonical claims that Ubuntu 18.04 will get Linux Kernel 5.3 sometime next year. However, I wont be able to wait that long.  I tried downloading and installing Kernel 5.2.14, but I cant go beyond Grub: I get the error:     error: you need to load the kernel first.   Other option is to download the Intel Backport Driver, which I tried. That didn't seem to work either. As per the tutorials, I've restarted frequently, but that didnt work either.  Also I'm not quite sure if Intel IWLWIFI Backport driver supports AX201 in the first place.  WiFi works while I'm booted in Windows.  What should I do?  Thanks in advance!  UPDATE  I tried out @Pilot6's answer, and it worked. Thanks!  I have one last question: I've read that if you upgrade the Kernel beyond what Ubuntu 18.4 supports, its kinda unsafe (which I read as prone to system crashes).  I dont want system crashes because I have only one partition (root) for Ubuntu, and any crash would likely mean all my data is lost. One method forward would be to split my Ubuntu partition into root and home.  So if I want to access WiFi on my device safely without risking any crashes, what should I do?  My understanding of Ubuntu and Linux may be wrong as they are built on forum answers only. Please correct me if Im wrong anywhere.
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I just installed Kali Linux on Dell Inspiron 1545, and am unable to get wireless connection. I attempted the following root@kali:~# lspci -knn | grep Net -A2 0c:00.0 Network controller [0280]: Broadcom Corporation BCM4312 802.11b/g LP-PHY [14e4:4315] (rev 01)     Subsystem: Dell Wireless 1397 WLAN Mini-Card [1028:000c]  # apt-get install firmware-iwlwifi # modprobe -r iwlwifi; modprobe iwlwifi  I even tried commands I used when I installed Ubuntu on the same laptop sudo apt-get install bcmwl-kernel-source sudo modprobe -r b43 bcma sudo modprobe wl  How to fix? UPDATE I also ran sudo apt-get install kali-linux-wireless but I still cannot detect and connect to my home wi-fi. Thanks! Tried first solution I tried first solution, but when I go to Administration &gt; System, I get package manager. I searched for everything Broadcom downloaded, installed, rebooted, but still no wireless. There has to be an easy solution ...... Am trying this,  I was getting errors with install. After I reboot, still no wireless detector. Update I'm trying all your suggestions .... seems I will have to read the links you provided. Who knew getting wireless would be so difficult! I will extend bounty time if possible.
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I'm trying to install drivers for my Wifi on my HP All-in-one desktop. I've been told to show the output of the command "sudo lshw -C network" so here it is:  *-network description: Ethernet interface product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller vendor: Realtek Semiconductor Co., Ltd physical id: 0 bus info: pci@0000:01:00.0 logical name: enp1s0 version: 15 serial: 48:ba:4e:5c:06:5f size: 100Mbit/s capacity: 1Gbit/s width: 64 bits clock: 33MHz capabilities: pm msi pciexpress msix bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=full firmware=rtl8168h-2_0.0.2 02/26/15 ip=192.168.1.21 latency=0 link=yes multicast=yes port=MII speed=100Mbit/s resources: ire:31 import:e000(size=256) memory: fea04000-fea04fff memory:fea00000-fea03fff  *-network UNCLAIMED description: Network controller product: Realtek Semiconductor Co., Ltd. vendor: Realtek Semiconductor Co., Ltd. physical id: 0 bus info: pci@0000:02:00.0 version: 00 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress cap_list configuration: latency=0 resources: import:d000(size=256) memory:fe900000-fe90ffff   Output from "lspci -nnk | grep -A2 0280":  02:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8821CE 802.11ac PCIe Wireless Network Adapter [10ec:c821] Subsystem: Hewlett-Packard Company RTL8821CE 802.11ac PCIe Wireless Network Adapter [103c:831a] 03:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS5229 PCI Express Card Reader [10ec:5229] (rev 01)
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I have installed Ubuntu 15.04 on my laptop with RTL8723BE Wi-fi card. But it is always disconnecting from network. I have tried echo "options rtl8723be fwlps=N ips=N" | sudo tee /etc/modprobe.d/rtl8723be.conf but that didn't helped. What can I do to prevent the wifi from disconnecting? If I upgrade to kernel 4.X, will it help?  ~$ lspci -knn | grep Net -A2  09:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8723BE PCIe Wireless Network Adapter [10ec:b723]     Subsystem: Hewlett-Packard Company Device [103c:2231]     Kernel driver in use: rtl8723be   ~$ rfkill list 0: hci0: Bluetooth     Soft blocked: yes     Hard blocked: no 1: phy0: Wireless LAN     Soft blocked: no     Hard blocked: no   ~$ ifconfig &amp;&amp; iwconfig &amp;&amp; route -n &amp;&amp; ping -c 1 google.com eth0      Link encap:Ethernet  HWaddr 38:63:bb:cd:4a:7e             UP BROADCAST MULTICAST  MTU:1500  Metric:1           RX packets:3 errors:0 dropped:0 overruns:0 frame:0           TX packets:53 errors:0 dropped:0 overruns:0 carrier:0           collisions:0 txqueuelen:1000            RX bytes:752 (752.0 B)  TX bytes:8445 (8.4 KB)  lo        Link encap:Local Loopback             inet addr:127.0.0.1  Mask:255.0.0.0           inet6 addr: ::1/128 Scope:Host           UP LOOPBACK RUNNING  MTU:65536  Metric:1           RX packets:3870 errors:0 dropped:0 overruns:0 frame:0           TX packets:3870 errors:0 dropped:0 overruns:0 carrier:0           collisions:0 txqueuelen:0            RX bytes:314613 (314.6 KB)  TX bytes:314613 (314.6 KB)  wlan0     Link encap:Ethernet  HWaddr c0:38:96:6d:c4:83             inet addr:192.168.1.205  Bcast:192.168.1.255  Mask:255.255.255.0           inet6 addr: fe80::c238:96ff:fe6d:c483/64 Scope:Link           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1           RX packets:15240 errors:0 dropped:0 overruns:0 frame:0           TX packets:14627 errors:0 dropped:0 overruns:0 carrier:0           collisions:0 txqueuelen:1000            RX bytes:14410285 (14.4 MB)  TX bytes:2192744 (2.1 MB)  eth0      no wireless extensions.  wlan0     IEEE 802.11bgn  ESSID:"DIR-615"             Mode:Managed  Frequency:2.437 GHz  Access Point: 00:90:4C:08:00:0D              Bit Rate=150 Mb/s   Tx-Power=20 dBm              Retry short limit:7   RTS thr=2347 B   Fragment thr:off           Power Management:off           Link Quality=70/70  Signal level=-22 dBm             Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0           Tx excessive retries:0  Invalid misc:186   Missed beacon:0  lo        no wireless extensions.  Kernel IP routing table Destination     Gateway         Genmask         Flags Metric Ref    Use Iface 0.0.0.0         192.168.1.1     0.0.0.0         UG    400    0        0 wlan0 169.254.0.0     0.0.0.0         255.255.0.0     U     1000   0        0 wlan0 192.168.1.0     0.0.0.0         255.255.255.0   U     0      0        0 wlan0 PING google.com.Dlink (172.26.136.19) 56(84) bytes of data. 64 bytes from 19.136.26.172.in-addr.arpa (172.26.136.19): icmp_seq=1 ttl=249 time=102 ms  --- google.com.Dlink ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 102.547/102.547/102.547/0.000 ms
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I just installed Ubuntu 13.04 with my Pavilion dv6. My laptop originally was operated under Windows 7. My WiFi worked fine when it was still on Windows 7. However, after I changed the OS to Linux using Ubuntu 13.04, the WiFi stopped working anymore. I can see the network list. I can also use wired network, and it is fine. I just cannot connect to my router even with the correct password.  Technical:  01:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168 PCI Express Gigabit Ethernet controller (rev 06) 02:00.0 Network controller: Broadcom Corporation BCM4313 802.11b/g/n Wireless LAN Controller (rev 01) 03:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS5209 PCI Express Card Reader (rev 01) 03:00.1 SD Host controller: Realtek Semiconductor Co., Ltd. RTS5209 PCI Express Card Reader (rev 01)
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I know this question has been asked here before, but the answers haven't helped me.  I have a Lenovo Ideapad on which I've installed via UNetbootin 18.04.  Everything else with the install went smoothly, but like others my wifi is not working.  In particular, I've gotten the no wi-fi adapter found message.    Many of the fixes relied on gaining access to the internet via an ethernet connection, but my machine doesn't have a connection for that.  I haven't used Ubuntu in several years so my Linux foo is very rusty. I'm essentially a newbie.   03:00.0 Network controller [0280]:  Realtek Semiconductor Co., Ltd. RTL8821CE 802.11ac PCIe Wireless Network Adapter [10ec:c821]           Subsystem: Lenovo RTL8821CE 802.11ac PCIe Wireless Network Adapter [17aa:co24]   Let me emphasize newbie again.  I don't know how else to post this.  Here's the feedback now that I attempt to run make after updating and upgrading again:  /bin/sh: 1: cc: not found (standard_in) 1: syntax error make ARCH=x86_64 CROSS_COMPILE= -C /lib/modules/4.18.0-15-generic/build M=/home/john/Downloads/rtl8821ce  modules make[1]: Entering directory '/usr/src/linux-headers-4.18.0-15-generic' arch/x86/Makefile:155: CONFIG_X86_X32 enabled but no binutils support ./scripts/gcc-version.sh: line 26: gcc: command not found ./scripts/gcc-version.sh: line 27: gcc: command not found Makefile:970: "Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" make[1]: gcc: Command not found make[1]: gcc: Command not found make[1]: gcc: Command not found make[1]: gcc: Command not found /bin/sh: 1: gcc: not found (standard_in) 1: syntax error /home/john/Downloads/rtl8821ce/Makefile:2157: home/john/Downloads/rtl8821ce/hal/phydm/phydm.mk: No such file or directory /home/john/Downloads/rtl8821ce/Makefile:2166: home/john/Downloads/rtl8821ce/rtl8821c.mk: No such file or directory make[2]: *** No rule to make target 'home/john/Downloads/rtl8821ce/rtl8821c.mk'.  Stop. Makefile:1534: recipe for target '_module_/home/john/Downloads/rtl8821ce' failed make[1]: *** [_module_/home/john/Downloads/rtl8821ce] Error 2 make[1]: Leaving directory '/usr/src/linux-headers-4.18.0-15-generic' Makefile:2237: recipe for target 'modules' failed make: *** [modules] Error 2 john@john-Lenovo-ideapad-130S-11IGM:~/Downloads/rtl8821ce$ sudo make install /bin/sh: 1: cc: not found (standard_in) 1: syntax error install -p -m 644 8821ce.ko  /lib/modules/4.18.0-15-generic/kernel/drivers/net/wireless/ install: cannot stat '8821ce.ko': No such file or directory Makefile:2243: recipe for target 'install' failed make: *** [install] Error 1   Ran the commands and got these errors:  E: Could not get lock /var/lib/dpkg/lock-frontend - open (11: Resource temporarily unavailable) E: Unable to acquire the dpkg frontend lock (/var/lib/dpkg/lock-frontend), is another process using it? john@john-Lenovo-ideapad-130S-11IGM:~$ sudo apt-get install libelf-dev E: Could not get lock /var/lib/dpkg/lock-frontend - open (11: Resource temporarily unavailable) E: Unable to acquire the dpkg frontend lock (/var/lib/dpkg/lock-frontend), is another process using it?
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I have continuous problems of network dropping connections on wifi with ubuntu 16.04, I have an ASUS R510J, this is my network card:  ##### lspci #############################  03:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8821AE 802.11ac PCIe Wireless Network Adapter [10ec:8821]         Subsystem: AzureWave RTL8821AE 802.11ac PCIe Wireless Network Adapter [1a3b:2161]         Kernel driver in use: rtl8821ae  04:00.1 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 12)         Subsystem: ASUSTeK Computer Inc. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [1043:200f]         Kernel driver in use: r8169   sudo service network-manager restart doesnt's help, as I never regain internet connection after it drops, and I have to restart the PC. On Ethernet cable I have no problem.  What do you think is the issue? drivers?  thank you
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So I did a fresh install of Ubuntu 20.04 on a computer with the new RTL8125B Realtek network card and I cannot get the network to work. I was very suprised since this is supposed to be the new feature of the 5.4 kernel (I have 5.4.0-26-generic installed). Does anyone have any idea on how to get it working? Thank you. $ lspci -knn | grep Eth -A3 06:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8125 2.5GbE Controller [10ec:8125] (rev 04) Subsystem: ASUSTeK Computer Inc. RTL8125 2.5GbE Controller [1043:87d7] Kernel modules: r8169 07:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Ellesmere [Radeon RX 470/480/570/570X/580/580X/590] [1002:67df] (rev e7)  $ dmesg | grep -i r8169 [    0.911236] r8169 0000:06:00.0: unknown chip XID 641
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--Edit-- (in case I need to see this again)  After a clean install this worked: Your device uses the driver b43 and proprietary firmware. The Broadcom STA driver which provides wl is not appropriate. Please get a temporary wired ethernet connection and do:  sudo apt-get remove --purge bcmwl-kernel-source   If it isn't installed, just proceed.  sudo apt-get install linux-firmware-nonfree sudo modprobe -r b43 &amp;&amp; sudo modprobe b43   You should be all set.  --  Thank you guys!!   Tried using the Additional Drivers gui and that didn't work. Tried using jockey-text --list  kmod:wl - Broadcom STA proprietary wireless driver (Proprietary, Disabled, Not in use) [auto-install]   Tried using jockey-text --enable=kmod:wl this was the response  Sorry, the installation of this driver failed. Please have a look at the log file for details: /var/log/jockey.log   From the log file:  2013-02-09 00:49:57,904 DEBUG: BroadcomWLHandler enabled(): kmod disabled, bcm43xx: blacklisted, b43: enabled, b43legacy: enabled 2013-02-09 00:50:05,572 WARNING: modinfo for module wl failed: ERROR: modinfo: could not find module wl 2013-02-09 00:50:05,572 WARNING: /sys/module/wl/drivers does not exist, cannot rebind wl driver 2013-02-09 00:50:05,600 DEBUG: BroadcomWLHandler enabled(): kmod disabled, bcm43xx: blacklisted, b43: enabled, b43legacy: enabled    Now it looks and feels like I'm doing everything right and the similar searchs seemed to suggest doing what I've done, so what am I doing wrong and how does one enable this driver? second to last line of the log suggests the file or directory is missing, is there somewhere I can get a linux broadcom driver from to put in that directory? If it's missing why is it in the list?  Please help, while the graphics driver is only partially supported it has given me the right resolution, and everything runs without crashing (but the system information says it's an unknown graphics card, I can live with that) but without the wireless card working I have sit really close to the router thanks to a very short cable...  Hopefully I've given enough information, please send Linux.Ninjas to help.  --  OK, used.  lspci|grep Network    not sure if that would give differentt results but I got   01:00.0 Network Controller: Broadcom Corporation BCM4311 802.11b/g (rev 01)    so then used   iwconfig    and got   lo no wireless extensions.  wlan0 IEEE 802.11bg ESSID:off/any  mode:managed access point not-associated tx-power=0 dbm  Retry long limit:7 RTS thr:off Fragment thr:off power management:on   eth0 no wireless extensions   --  After @Chili555 advice I did   sudo apt-get remove --purge bcmwl-kernel-source   But got   E: dpkg was interupted, you must manually run 'sudo dpkg --configure -a' to correct the problem.   When I do it runs ok, but then crashes and freezes. Halway through it says that it's fixing recurrent problems but needs rebooting, then gets to a line "End of trace" and thats where it halts.
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I installed Ubuntu 10.10 on my Dell Inspiron 1521 and the LAN/Ethernet card was working perfectly but Ubuntu was displaying a message about not installing the Wireless drivers because it was restricted or something along that line.  I then went to the Synaptic Package Manager, searched for all Broadcom packages and installed them. So far so good.  I restarted my computer and to my surprise, my wireless works but my lan isn't! What the heck could be wrong?  I then uninstalled/removed all the packages I installed earlier hoping my ethernet would start working again but hey, nothing changed. My wireless card works and the ethernet still doesn't.  Is there any way of getting this fixed?  I checked and found my network devices were:   Broadcom Corporation BCM4401-B0 100Base-TX (rev 02) Broadcom Corporation BCM4311 802.11b/g WLAN (rev 01)
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Hey guys I'm having some issue with my rtl8188ee network card. On Windows I get ~30-40 Mb/s whereas on Ubuntu 15.04 I get ~5 Mb/s. However, the issue comes and goes; often after disconnecting and reconnecting my WiFi temporarily jumps to the proper speed, only to recede again shortly.   In search for an answer I came across ; however I was unable to properly compile the driver (here's  I get when running make).  I was wondering if anyone knew how I could manage to compile the driver properly, or if anyone has another way to fix the slow WiFi speeds in Ubuntu 15.04.  In order to give as much information as possible, here are some diagnostic information:  uname --all:  Linux david-Lenovo-H535 3.19.0-21-generic #21-Ubuntu SMP Sun Jun 14 18:31:11 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux   lshw -C network:  *-network                   description: Ethernet interface    product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller    vendor: Realtek Semiconductor Co., Ltd.    physical id: 0    bus info: pci@0000:01:00.0    logical name: eth0    version: 09    serial: c0:3f:d5:72:be:6c    size: 10Mbit/s    capacity: 1Gbit/s    width: 64 bits    clock: 33MHz    capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation    configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half firmware=rtl8168f-1_0.0.5 06/18/12 latency=0 link=no multicast=yes port=MII speed=10Mbit/s    resources: irq:46 ioport:e000(size=256) memory:d0004000-d0004fff memory:d0000000-d0003fff  *-network    description: Wireless interface    product: RTL8188EE Wireless Network Adapter    vendor: Realtek Semiconductor Co., Ltd.    physical id: 0    bus info: pci@0000:04:00.0    logical name: wlan0    version: 01    serial: 28:e3:47:60:76:6f    width: 64 bits    clock: 33MHz    capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless    configuration: broadcast=yes driver=rtl8188ee driverversion=3.19.0-21-generic firmware=N/A ip=10.0.0.14 latency=0 link=yes multicast=yes wireless=IEEE 802.11bgn    resources: irq:48 ioport:d000(size=256) memory:fea00000-fea03fff     Edit  I successfully installed the new driver thanks to @Pilot6 but problem persists. For more information, my download is the only speed affected. Upload is consistent at 10 Mb/s. I really have no clue what to do at this point. I know the hardware is fine because in Windows I don't have any issues with wireless.  Second Edit  Disabling IPv6 worked for a while but speeds dropped back down again. Problem remains intermittent. I don't think this has to do with the wireless repeater I'm using because all other devices work fine. Further, upload speeds have been entirely consistent, so I doubt it has to do with the signal or interference.  Alas, 5 Mb/s is sufficient for my daily routine. I only hope a future update will solve the problem.
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The wireless drivers for the RTL8723DE appeared for downloading and the module is now usable for Wi-Fi.   See   But the bluetooth part of it is yet not supported on Ubuntu. How this can be fixed?  lsusb shows  Bus 001 Device 003: ID 0bda:b009 Realtek Semiconductor Corp.    And usb-devices | awk '/0bda/' RS=  T:  Bus=01 Lev=02 Prnt=02 Port=03 Cnt=01 Dev#=  3 Spd=12  MxCh= 0 D:  Ver= 1.10 Cls=e0(wlcon) Sub=01 Prot=01 MxPS=64 #Cfgs=  1 P:  Vendor=0bda ProdID=b009 Rev=02.00 S:  Manufacturer=Realtek S:  Product=802.11n WLAN Adapter S:  SerialNumber=00e04c000001 C:  #Ifs= 2 Cfg#= 1 Atr=e0 MxPwr=500mA I:  If#= 0 Alt= 0 #EPs= 3 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb I:  If#= 1 Alt= 0 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
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I installed Ubuntu 17.10.1 on my HP Pavilion x360 convertible, and my wi-fi connection was very weak.  I tried to install this driver from GitHub called rock.new_btcoex, but it didn't work.  What else can I try?
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Cannot make this wireless adapter work on Ubuntu 20.04... please help. I've tried this:  and now lsusb sees the device, but still doesn't work. lsusb: Bus 002 Device 006: ID 2357:0138 TP-Link 802.11ac NIC uname -r: 5.4.0-39-generic Edit: It works on my other computer with Ubuntu 18.04 using T2U Plus driver from here:  But it does not work with Ubuntu 20.04... sudo modprobe 88x2bu: Gives nothing. modinfo 88x2bu | grep -e version -e 0138 : version:        v5.6.1_30362.20181109_COEX20180928-6a6a srcversion:     9C5282368F93050B7206C8D parm:           rtw_chip_version:int  dmesg | grep 88x2 : [ 8087.334869] 88x2bu: loading out-of-tree module taints kernel. [ 8087.336610] 88x2bu: module verification failed: signature and/or required key missing - tainting kernel [ 8087.341389] usbcore: registered new interface driver rtl88x2bu