Very slow wireless with rt2800pci

[Andrea]

I have a Linksys WMP600N (rt2800pci driver). My wireless connection is extremely slow and unstable. I am using Kubuntu 16.04, with Kernel 4.4.0-36 or 4.7.0-0. The speed test results are: DL: 2.02Mbps UL:0.05Mbps Ping:183ms , the speed test with another PC with the same wireless network : DL:12Mbps UL:1.20Mbps Ping:48ms.
I have follow this guide: http://askubuntu.com/questions/405644/slow-wireless-with-rt2800pci
But nothing is changed

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-36-generic 4.4.0-36.55
ProcVersionSignature: Ubuntu 4.4.0-36.55-generic 4.4.16
Uname: Linux 4.4.0-36-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: andrea 3231 F.... pulseaudio
CurrentDesktop: KDE
Date: Tue Sep 13 14:28:22 2016
HibernationDevice: RESUME=UUID=7237eef7-9261-4799-8955-b4466b0e5cb5
InstallationDate: Installed on 2016-09-02 (11 days ago)
InstallationMedia: Kubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
MachineType: Gigabyte Technology Co., Ltd. M720-US3
ProcFB: 0 nouveaufb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-36-generic root=UUID=83949c88-4099-41fa-a6fd-f143912ae477 ro quiet splash
RelatedPackageVersions:
 linux-restricted-modules-4.4.0-36-generic N/A
 linux-backports-modules-4.4.0-36-generic N/A
 linux-firmware 1.157.3
RfKill:
 0: phy0: Wireless LAN
  Soft blocked: no
  Hard blocked: no
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/07/2010
dmi.bios.vendor: Award Software International, Inc.
dmi.bios.version: F7n
dmi.board.name: M720-US3
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF7n:bd09/07/2010:svnGigabyteTechnologyCo.,Ltd.:pnM720-US3:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnM720-US3:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
dmi.product.name: M720-US3
dmi.sys.vendor: Gigabyte Technology Co., Ltd.

[Brad Figg (brad-figg)]

This change was made by a bot.

[Joseph Salisbury (jsalisbury)]

Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem?

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.8 kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.8-rc6

[Carmine Paolino (crmne)]

I had the same problem and unsuccessfully tried:

1. the linux-firmware package from yakkety
2. kernel-4.6.3-yakkety
3. kernel-4.7.4
4. sudo modprobe rt2800pci nohwcrypt=Y
5. sudo iw reg set NL

While the newer kernels seemed to alleviate the problem, they didn't fix it.

Then I reverted all the previously listed changes and turned the card's power management off. That fixed it. However, since power management would turn on every time it would connect to a network, I made a simple NetworkManager script, that you can find at http://askubuntu.com/a/825976/349291

The following are some relevant info about my system:

$ uname -a
Linux precision390 4.4.0-36-generic #55-Ubuntu SMP Thu Aug 11 18:01:55 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

$ iwconfig
wlp5s5 IEEE 802.11abgn ESSID:"<edited>"
          Mode:Managed Frequency:5.18 GHz Access Point: <edited>
          Bit Rate=270 Mb/s Tx-Power=20 dBm
          Retry short limit:7 RTS thr:off Fragment thr:off
          Power Management:off
          Link Quality=42/70 Signal level=-68 dBm
          Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
          Tx excessive retries:133 Invalid misc:781 Missed beacon:0

$ apt list linux-firmware
Listing... Done
linux-firmware/xenial-updates,xenial-updates,now 1.157.3 all [installed,automatic]

[Andrea (andry-dp92)]

Workaround
Connect to the 5Ghz wireless network.

[Kzin (wmkzin)]

I have the same problem.

$ uname -a
Linux IT-001 4.4.0-62-generic #83-Ubuntu SMP Wed Jan 18 14:10:15 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

$ iwconfig
wlan0 IEEE 802.11bgn ESSID:"xxxxxxxxxxxxx"
          Mode:Managed Frequency:2.462 GHz Access Point: xxxxxxxxxxxx
          Bit Rate=52 Mb/s Tx-Power=20 dBm
          Retry short limit:7 RTS thr:off Fragment thr:off
          Power Management:on
          Link Quality=70/70 Signal level=-33 dBm
          Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
          Tx excessive retries:2173 Invalid misc:4912 Missed beacon:0

$ apt list linux-firmware -a
Listing... Done
linux-firmware/xenial-security,xenial-security,xenial-updates,xenial-updates,now 1.157.8 all [installed,automatic]
linux-firmware/xenial,xenial 1.157 all

My card uses this driver, but I don't think it supports the 5Ghz network mode. Andrea's workaround does not work for me.