I have experienced this bug on a non Ubuntu system for some time. I spent some time comparing the SparkLAN DPO driver source with the main line kernel driver source and tried a couple of changes.
1) There were some places missing a lock (this change did not affect this bug, however). 2) The DPO driver performed the 32-bit register writes as two 16-bit single write commands instead of one four byte multi-write command. I suspected that this might lead to race conditions setting the registers (not atomic) which was causing the Wi-Fi chip to hang. I thought it possible that the Wi-Fi chip firmware might buffer the two 16-bit single writes and then perform a single 32-bit write to the register, thus making it atomic. I asked SparkLAN about this, but received no reply. Note that the DPO driver performs the 32-bit register reads as a single four byte multi-read, just like the main line kernel driver does. I tested the following patch and the problem went away, either because it fixes the issue or it changes the timing to cover it up. Perhaps a distinction without a difference. ** Attachment added: "rt2x00usb.pat" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/362875/+attachment/4957754/+files/rt2x00usb.pat -- 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/362875 Title: rt2x00usb_vendor_request: Error - Vendor Request 0x07 failed for offset Status in linux package in Ubuntu: Confirmed Status in rt2x00 package in Ubuntu: Confirmed Bug description: Binary package hint: linux-firmware Dear friends, [24225.012753] phy2 -> rt2x00usb_vendor_request: Error - Vendor Request 0x07 failed for offset 0x308c with error -71. [24225.017901] phy2 -> rt2x00usb_vendor_request: Error - Vendor Request 0x06 failed for offset 0x308c with error -71. [24225.022279] phy2 -> rt2x00usb_vendor_request: Error - Vendor Request 0x07 failed for offset 0x308c with error -71. [24226.005773] phy2 -> rt2x00usb_vendor_request: Error - Vendor Request 0x07 failed for offset 0x30c0 with error -71. [24226.011307] phy2 -> rt2x00usb_vendor_request: Error - Vendor Request 0x07 failed for offset 0x30c4 with error -71. [24226.015147] phy2 -> rt2x00usb_vendor_request: Error - Vendor Request 0x07 failed for offset 0x308c with error -71. [24226.020486] phy2 -> rt2x00usb_vendor_request: Error - Vendor Request 0x06 failed for offset 0x308c with error -71. [24226.024151] phy2 -> rt2x00usb_vendor_request: Error - Vendor Request 0x07 failed for offset 0x308c with error -71. [24227.003532] phy2 -> rt2x00usb_vendor_request: Error - Vendor Request 0x07 failed for offset 0x30c0 with error -71. [24227.007269] phy2 -> rt2x00usb_vendor_request: Error - Vendor Request 0x07 failed for offset 0x30c4 with error -71. [24227.020153] phy2 -> rt2x00usb_vendor_request: Error - Vendor Request 0x07 failed for offset 0x308c with error -71. [24227.023895] phy2 -> rt2x00usb_vendor_request: Error - Vendor Request 0x06 failed for offset 0x308c with error -71. [24227.027645] phy2 -> rt2x00usb_vendor_request: Error - Vendor Request 0x07 failed for offset 0x308c with error -71. This is an example of the message I'm continually getting. ID 148f:2671 Ralink Technology, Corp. RT2601USB Wireless Adapter Many blessings. ProblemType: Bug Architecture: i386 Dependencies: DistroRelease: Ubuntu 8.10 Package: linux-restricted-modules None [modified: /var/lib/dpkg/info/linux-restricted-modules.list] ProcEnviron: SHELL=/bin/bash PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/X11R6/bin LANG=en_US.UTF-8 SourcePackage: linux-meta Uname: Linux 2.6.27-7-generic i686 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/362875/+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
