blag/post/af9015-bulk-message-failed-switch-usb-ports.mdwn

   1 [[!meta title="af9015 bulk message failed: Switch USB Ports?"]]
   2 [[!meta date="2009-08-24 01:00"]]
   3 [[!meta author="rohieb"]]
   4 [[!meta license="CC-BY-SA 3.0"]]
   5
   6 Yesterday, I suddenly wasn’t able to use my AF9015-based DVB-T USB stick
   7 anymore. It only worked for about a minute, then the image froze and
   8 `dmesg` said the following:
   9
  10         [10633.166371] usb 1-3: USB disconnect, address 5
  11         [10633.186247] af9015: bulk message failed:-22 (8/-339951920)
  12         [10633.186254] af9013: I2C read failed reg:d417
  13         [10633.186258] af9015: bulk message failed:-22 (8/-1067461161)
  14         [10633.186265] af9013: I2C read failed reg:d417
  15         [10633.186279] af9015: bulk message failed:-22 (9/-339951284)
  16         [10633.186282] mt2060 I2C write failed
  17
  18 I was not even able to `rmmod` the dvb-usb-af9015 kernel module, the
  19 rmmod process just hung itself up.
  20
  21 After two hours of compiling a new driver version, experimenting with
  22 kernel parameters and getting a new [firmware
  23 version](http://www.otit.fi/~crope/v4l-dvb/af9015/af9015_firmware_cutter/firmware_files/4.95.0/),
  24 I finally booted into my rarely used Windows system. The first thing I
  25 saw was the “USB 2.0 device on USB 1.1 bus”, and as I also could not get
  26 a movie stream, I tried to plug the DVB-T stick into a different USB
  27 port. And voilà, suddenly everything worked again, as well on Windows as
  28 later on Linux. No more error messages in the kernel log, everything
  29 just fine as before.
  30
  31 But I wonder if I have been using this USB port before — as far as I can
  32 remember, the DVB-T stick had always been on the other port… Yet another
  33 proof for me to never trust yourself :D
  34
  35 **Update:** Unfortunately, this solution did not help for long. After
  36 about two weeks, the error is still there, and also occurs more
  37 frequently, near to once an evening (until I reboot). So maybe, it
  38 hasn’t even to do with switching USB ports, and my hardware is beginning
  39 to fail… :(
  40
  41 **Update:** Seems it is fixed now, using revision dca0fed8d68b (Sat Sep
  42 26 19:27:52 2009 +0200) of
  43 [anttip’s](http://linuxtv.org/hg/~anttip/af9015) repository. At least it
  44 worked for over 4 hours now :-)
  45
  46 [[!tag AF9015 driver DVB-T USB Linux Ubuntu]]