blag: convert (and slightly improve) blogposts from rohieb.wordpress.org

[www-rohieb-name.git] / blag / post / af9015-bulk-message-failed-switch-usb-ports.mdwn

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+[[!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]]