After some more testing with 3.14-rc8 I can confirm that the situation is just a tiny bit better than in the repository kernel: * associating to the cellphone accesspoint does not always work and the syslog shows several attempts until it works if it works * if the connection is there, it is unstable and sometimes disconnects with traffic * packet loss and ping times are bad (see belowresults for pinging my personal homepage (hosted in switzerland) via my cellphone accesspoint
pinging from the computer with the 3.14-rc8 kernel and the WN8200ND hardware: ping-8192cu.txt --- www.peterschueller.com ping statistics --- 28 packets transmitted, 28 received, 0% packet loss, time 27045ms rtt min/avg/max/mdev = 157.014/496.532/2018.405/510.937 ms, pipe 3 pinging from my laptop (centrino ultimate-n 6300 wifi card): --- www.peterschueller.com ping statistics --- 29 packets transmitted, 21 received, 27% packet loss, time 28101ms rtt min/avg/max/mdev = 367.968/867.568/4077.452/835.474 ms, pipe 5 So the average roundtrip is actually better with the 8192cu but the deviation is greater and the packet loss is 27% compared to 0%. Some more observations: * the syslog shows frequent powersave messages, even if there is no extra traffic happening. * if I provoke traffic by downloading a 1.2 MB file, the file is downloaded completely before syslog shows that it went out of powersave mode (although tail -f on the syslog file might not be the optimal way to do such a test) short syslog excerpt Mar 30 16:58:29 oldie kernel: [ 2553.436071] rtw_set_ps_mode(): Busy Traffic , Leave 802.11 power save.. Mar 30 16:58:29 oldie kernel: [ 2553.436182] rtl8192c_set_FwPwrMode_cmd(): Mode = 0, SmartPS = 0 Mar 30 16:58:32 oldie kernel: [ 2557.332718] rtw_set_ps_mode(): Enter 802.11 power save mode... Mar 30 16:58:32 oldie kernel: [ 2557.332726] rtl8192c_set_FwPwrMode_cmd(): Mode = 1, SmartPS = 2 Mar 30 16:58:50 oldie kernel: [ 2575.005351] rtw_set_ps_mode(): Busy Traffic , Leave 802.11 power save.. Mar 30 16:58:50 oldie kernel: [ 2575.005473] rtl8192c_set_FwPwrMode_cmd(): Mode = 0, SmartPS = 0 Mar 30 16:58:53 oldie kernel: [ 2577.449566] issue_nulldata(wlan0) to b0:c4:e7:2a:01:d9, ch:6, 3/3 in 1056 ms Mar 30 16:58:53 oldie kernel: [ 2577.449574] survey done event(15) band:0 for wlan0 Mar 30 16:58:54 oldie kernel: [ 2579.376663] rtw_set_ps_mode(): Enter 802.11 power save mode... Mar 30 16:58:54 oldie kernel: [ 2579.376672] rtl8192c_set_FwPwrMode_cmd(): Mode = 1, SmartPS = 2 Mar 30 16:58:54 oldie kernel: [ 2579.409536] OnAction_back Mar 30 16:58:54 oldie kernel: [ 2579.409556] OnAction_back, action=2 Mar 30 16:58:54 oldie kernel: [ 2579.409560] OnAction_back(): DELBA: 0(0) Mar 30 16:58:54 oldie kernel: [ 2579.413849] Drop duplicate management frame with seq_num = 825. Mar 30 16:58:54 oldie kernel: [ 2579.413868] Drop duplicate management frame with seq_num = 825. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1298802 Title: 2357:0100 USB Wifi TP-Link WN8200ND cannot associate to access points Status in “linux” package in Ubuntu: Confirmed Bug description: The Usb Wifi dongle TP-Link WN8200ND (rtl8192cu driver) does not connect with a default 14.04 trusty updated one or two days ago from the internet. If I add the dkms module that replaces the builtin driver (see instructions and source code in [1]) then I can connect to some access points (like my cellphone tethering access point) but not to other access points where my laptop connects without any problems. [1] https://github.com/pvaret/rtl8192cu-fixes --- ApportVersion: 2.13.3-0ubuntu1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: ps 1652 F.... pulseaudio /dev/snd/controlC2: ps 1652 F.... pulseaudio /dev/snd/controlC0: ps 1652 F.... pulseaudio DistroRelease: Ubuntu 14.04 HibernationDevice: RESUME=UUID=503046a7-aabc-47e4-8821-4d73a4a06de1 InstallationDate: Installed on 2014-03-23 (5 days ago) InstallationMedia: Ubuntu-GNOME 14.04 "Trusty Tahr" - Alpha amd64 (20140321) IwConfig: eth0 no wireless extensions. lo no wireless extensions. MachineType: Gigabyte Technology Co., Ltd. 965P-DS3 Package: linux (not installed) ProcFB: 0 VESA VGA ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-19-generic root=UUID=7f56cb3c-a7fe-4445-85d6-321baab07d41 ro quiet splash nomodeset vt.handoff=7 ProcVersionSignature: Ubuntu 3.13.0-19.40-generic 3.13.6 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-3.13.0-19-generic N/A linux-backports-modules-3.13.0-19-generic N/A linux-firmware 1.126 RfKill: Tags: trusty Uname: Linux 3.13.0-19-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: _MarkForUpload: True dmi.bios.date: 01/12/2007 dmi.bios.vendor: Award Software International, Inc. dmi.bios.version: F10 dmi.board.name: 965P-DS3 dmi.board.vendor: Gigabyte Technology Co., Ltd. dmi.chassis.type: 3 dmi.chassis.vendor: Gigabyte Technology Co., Ltd. dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF10:bd01/12/2007:svnGigabyteTechnologyCo.,Ltd.:pn965P-DS3:pvr:rvnGigabyteTechnologyCo.,Ltd.:rn965P-DS3:rvr:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr: dmi.product.name: 965P-DS3 dmi.sys.vendor: Gigabyte Technology Co., Ltd. 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