[[!meta title="af9015 bulk message failed: Switch USB Ports?"]]
[[!meta date="2009-08-24 01:00"]]
[[!meta author="rohieb"]]
[[!meta license="CC-BY-SA 3.0"]]

Yesterday, I suddenly wasn’t able to use my AF9015-based DVB-T USB stick
anymore. It only worked for about a minute, then the image froze and
`dmesg` said the following:

	[10633.166371] usb 1-3: USB disconnect, address 5
	[10633.186247] af9015: bulk message failed:-22 (8/-339951920)
	[10633.186254] af9013: I2C read failed reg:d417
	[10633.186258] af9015: bulk message failed:-22 (8/-1067461161)
	[10633.186265] af9013: I2C read failed reg:d417
	[10633.186279] af9015: bulk message failed:-22 (9/-339951284)
	[10633.186282] mt2060 I2C write failed

I was not even able to `rmmod` the dvb-usb-af9015 kernel module, the
rmmod process just hung itself up.

After two hours of compiling a new driver version, experimenting with
kernel parameters and getting a new [firmware
version](http://www.otit.fi/~crope/v4l-dvb/af9015/af9015_firmware_cutter/firmware_files/4.95.0/),
I finally booted into my rarely used Windows system. The first thing I
saw was the “USB 2.0 device on USB 1.1 bus”, and as I also could not get
a movie stream, I tried to plug the DVB-T stick into a different USB
port. And voilà, suddenly everything worked again, as well on Windows as
later on Linux. No more error messages in the kernel log, everything
just fine as before.

But I wonder if I have been using this USB port before — as far as I can
remember, the DVB-T stick had always been on the other port… Yet another
proof for me to never trust yourself :D

**Update:** Unfortunately, this solution did not help for long. After
about two weeks, the error is still there, and also occurs more
frequently, near to once an evening (until I reboot). So maybe, it
hasn’t even to do with switching USB ports, and my hardware is beginning
to fail… :(

**Update:** Seems it is fixed now, using revision dca0fed8d68b (Sat Sep
26 19:27:52 2009 +0200) of
[anttip’s](http://linuxtv.org/hg/~anttip/af9015) repository. At least it
worked for over 4 hours now :-)

[[!tag AF9015 driver DVB-T USB Linux Ubuntu]]