Public bug reported: With the kernel drivers, my device based on the rtl8192cu chipset shows very poor performance (~50 kb/s downlink).
Only when installing the drivers supplied by realtek ( http://www.realtek.com/downloads/downloadsView.aspx?Langid=2&PNid=21&PFid=48&Level=5&Conn=4&ProdID=277&DownTypeID=3&GetDown=false&Downloads=true ) , I get full performance. According to this page, this driver is merged into the main kernel since 3.0.2. The debug information attached is with the drivers mentioned above installed. ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: linux-image-3.5.0-25-generic 3.5.0-25.38~precise1 ProcVersionSignature: Ubuntu 3.5.0-25.38~precise1-generic 3.5.7.4 Uname: Linux 3.5.0-25-generic x86_64 NonfreeKernelModules: nvidia AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.25. ApportVersion: 2.0.1-0ubuntu17.1 Architecture: amd64 ArecordDevices: **** List of CAPTURE Hardware Devices **** card 0: Intel [HDA Intel], device 0: VT1828S Analog [VT1828S Analog] Subdevices: 2/2 Subdevice #0: subdevice #0 Subdevice #1: subdevice #1 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: mazzzy 1819 F.... pulseaudio /dev/snd/controlC0: mazzzy 1819 F.... pulseaudio /dev/snd/pcmC0D0p: mazzzy 1819 F...m pulseaudio Card0.Amixer.info: Card hw:0 'Intel'/'HDA Intel at 0xf3ff8000 irq 51' Mixer name : 'VIA VT1828S' Components : 'HDA:11064441,104383d0,00100100' Controls : 52 Simple ctrls : 24 Card1.Amixer.info: Card hw:1 'NVidia'/'HDA NVidia at 0xf7afc000 irq 17' Mixer name : 'Nvidia GPU 12 HDMI/DP' Components : 'HDA:10de0012,10de0101,00100100' Controls : 24 Simple ctrls : 4 Date: Sun Feb 24 10:08:06 2013 HibernationDevice: RESUME=UUID=5d3f78d2-bc2f-4c30-806b-f63d453e1000 MachineType: System manufacturer System Product Name MarkForUpload: True ProcEnviron: LANGUAGE=en_US:en TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-25-generic root=/dev/sdb6 ro quiet splash RelatedPackageVersions: linux-restricted-modules-3.5.0-25-generic N/A linux-backports-modules-3.5.0-25-generic N/A linux-firmware 1.79.1 RfKill: SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 12/14/2010 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 1504 dmi.board.asset.tag: To Be Filled By O.E.M. dmi.board.name: P7P55D-E dmi.board.vendor: ASUSTeK Computer INC. dmi.board.version: Rev 1.xx dmi.chassis.asset.tag: Asset-1234567890 dmi.chassis.type: 3 dmi.chassis.vendor: Chassis Manufacture dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1504:bd12/14/2010:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP7P55D-E:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion: dmi.product.name: System Product Name dmi.product.version: System Version dmi.sys.vendor: System manufacturer ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug precise qa-kernel-lts-testing running-unity -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1132381 Title: rtl8192cu drivers very low dl-speed To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1132381/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
