I've now switched to Kubuntu 16.04 (64 bit, clean install) and can confirm that the problem is still there.
-- 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/1572698 Title: Slow speed and dropped connections with Realtek RTL8192CU-based wifi Status in linux package in Ubuntu: Confirmed Bug description: I am using a D-Link DWA-131 USB wlan adapter to connect to my private wlan. The adapter works fine under Windows and I have no problems connecting to my wlan with other devices (e.g. my laptop running Linux Mint). However, the adapter, which is based on the Realtek rtl8192cu chipset, won't work correctly on any current Ubuntu machine (in my case Kubuntu 15.10 64bit): As also showcased by a myriad of other bug reports (most of which have expired by now), wlan-adapters based on the Realtek rtl8192cu chipset exhibit very slow connection speeds and frequently dropped connections with current Linux kernels. I have noticed this originally in Linux Mint 17 running kernel 3.19.x, in Kubuntu 15.10 up to 4.2.0.35 and can confirm that it is still present in a live session of Xenial Xerus (16.04). I have tried commonly mentioned "fixes" such as deactivating hardware encryption without success. The drivers available on the Realtek homepage are apparently intended for older kernels and won't install. There is, however, a fixed driver available via github (https://github.com/pvaret/rtl8192cu-fixes). I have followed the instructions found there and finally my wlan-adapter is working correctly. Apparently the issues caused by the broken driver in the linux kernels might be connected to power management. I am posting this bug here in the hope that some developer finally manages to incorporate the (obviously available) fixes found in the github-drivers into the drivers already included in the kernel. --- ApportVersion: 2.19.1-0ubuntu5 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: patrick 2300 F.... pulseaudio /dev/snd/controlC1: patrick 2300 F.... pulseaudio DistroRelease: Ubuntu 15.10 HibernationDevice: RESUME=UUID=28c49a78-8b93-495e-bc1b-22c87db4734c InstallationDate: Installed on 2015-10-22 (181 days ago) InstallationMedia: Kubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021) MachineType: Gigabyte Technology Co., Ltd. GA-870A-UD3 NonfreeKernelModules: fglrx Package: linux (not installed) ProcFB: 0 VESA VGA ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-35-generic root=UUID=1016b861-fa27-4990-bac9-58a3ab27ff5b ro quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 4.2.0-35.40-generic 4.2.8-ckt5 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not accessible: Permission denied No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-4.2.0-35-generic N/A linux-backports-modules-4.2.0-35-generic N/A linux-firmware 1.149.3 RfKill: Tags: wily UdevLog: Error: [Errno 2] Datei oder Verzeichnis nicht gefunden: '/var/log/udev' Uname: Linux 4.2.0-35-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: _MarkForUpload: True dmi.bios.date: 08/01/2011 dmi.bios.vendor: Award Software International, Inc. dmi.bios.version: F5 dmi.board.name: GA-870A-UD3 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.:bvrF5:bd08/01/2011:svnGigabyteTechnologyCo.,Ltd.:pnGA-870A-UD3:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnGA-870A-UD3:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr: dmi.product.name: GA-870A-UD3 dmi.sys.vendor: Gigabyte Technology Co., Ltd. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1572698/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
