Public bug reported: After switching from linux-image-3.2.0-37 to linux-image-3.5.0-23, I noted the performance of my wireless network became awful (~1/10th of my regular ~3 Mbps). Several reboots and crosschecks with other devices confirmed that the kernel is to blame.
My wireless device: Bus 002 Device 003: ID 148f:3072 Ralink Technology, Corp. RT3072 Wireless Adapter The driver stack used under both kernels: rt2800usb 22773 0 rt2800lib 58967 1 rt2800usb crc_ccitt 12707 1 rt2800lib rt2x00usb 20808 1 rt2800usb rt2x00lib 55326 3 rt2800usb,rt2800lib,rt2x00usb mac80211 506862 3 rt2800lib,rt2x00usb,rt2x00lib cfg80211 205774 2 rt2x00lib,mac80211 Of course I googled and came across topics such as http://askubuntu.com/questions/131768/dlink-wireless-dwa-140-speeds-are- crippled-on-12-04, where it is adviced to switch to the (older?) rt5370sta. I tried that and although the driver installs, loads and even connects to my accesspoint just fine, it subsequently immediately freezes the 3.5 kernel. ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: linux-image-3.5.0-23-generic 3.5.0-23.35~precise1 ProcVersionSignature: Ubuntu 3.2.0-37.58-generic 3.2.35 Uname: Linux 3.2.0-37-generic x86_64 NonfreeKernelModules: nvidia AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24. ApportVersion: 2.0.1-0ubuntu17.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: ivo 2644 F.... pulseaudio CRDA: country NL: (2402 - 2482 @ 40), (N/A, 20) (5170 - 5250 @ 40), (N/A, 20), NO-OUTDOOR (5250 - 5330 @ 40), (N/A, 20), NO-OUTDOOR, DFS (5490 - 5710 @ 40), (N/A, 27), DFS Card0.Amixer.info: Card hw:0 'Intel'/'HDA Intel at 0xfdff8000 irq 44' Mixer name : 'Realtek ALC888' Components : 'HDA:10ec0888,12970000,00100001' Controls : 43 Simple ctrls : 20 Date: Fri Feb 15 21:51:50 2013 HibernationDevice: RESUME=UUID=e807172d-7e53-45ef-9a06-40c7ea6eccf2 InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429) MachineType: Shuttle Inc SP35 MarkForUpload: True ProcEnviron: LANGUAGE=en TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 VESA VGA ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-37-generic root=UUID=8148180a-7b5f-40f2-b582-36dfca309143 ro crashkernel=384M-2G:64M,2G-:128M quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.2.0-37-generic N/A linux-backports-modules-3.2.0-37-generic N/A linux-firmware 1.79.1 RfKill: 0: phy0: Wireless LAN Soft blocked: no Hard blocked: no SourcePackage: linux UpgradeStatus: Upgraded to precise on 2012-04-28 (293 days ago) WifiSyslog: Feb 15 19:49:42 twen kernel: [ 3790.494037] cfg80211: Found new beacon on frequency: 2472 MHz (Ch 13) on phy0 dmi.bios.date: 07/03/2009 dmi.bios.vendor: Phoenix Technologies, LTD dmi.bios.version: 6.00 PG dmi.board.name: FP35 dmi.board.vendor: Shuttle Inc dmi.board.version: V20 dmi.chassis.type: 3 dmi.chassis.vendor: Shuttle Inc dmi.chassis.version: G5 dmi.modalias: dmi:bvnPhoenixTechnologies,LTD:bvr6.00PG:bd07/03/2009:svnShuttleInc:pnSP35:pvrV20:rvnShuttleInc:rnFP35:rvrV20:cvnShuttleInc:ct3:cvrG5: dmi.product.name: SP35 dmi.product.version: V20 dmi.sys.vendor: Shuttle Inc ** Affects: linux (Ubuntu) Importance: Undecided Status: Confirmed ** 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/1126626 Title: Performance of rt2800usb module in 3.5.0 abysmal (used by RT3072 chipset) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1126626/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
