:~$ iw dev wlan0 link command failed: No such device (-19) :~$ iw dev wlan0 get power_save command failed: No such device (-19)
Seems like there is no device named wlan0. I think it is wlo1 instead of wlan0 on my laptop. When I replace wlan0 with wlo1, the results are as follows: :~$ iw dev wlo1 link Connected to 50:2b:73:74:69:91 (on wlo1) SSID: Crossroads freq: 2412 signal: -63 dBm tx bitrate: 150.0 MBit/s :~$ iw dev wlo1 get power_save Power save: on :~$ iw dev wlan0 set power_save off command failed: No such device (-19) :~$ iw dev wlo1 set power_save off command failed: Operation not permitted (-1) :~$ sudo iw dev wlo1 set power_save off [sudo] password for soumadeepsarkar1: :~$ iw dev wlo1 get power_save Power save: off Even after setting power_save to off, it speed doesn't improve. These are the speeds tested using speedtest.net after setting power_save to off PING ms 3 DOWNLOAD Mbps 4.23 UPLOAD Mbps 6.42 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1937926 Title: Realtek 8821C PCIe Wifi driver problem, wifi speed very slow on connecting to 2.4ghz network. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1937926/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs