Bug 13314

Summary:	mx900 (bluetooth mouse) stutters when moving
Product:	Drivers	Reporter:	Anthony Waters (awaters1)
Component:	Bluetooth	Assignee:	drivers_bluetooth (drivers_bluetooth)
Status:	CLOSED OBSOLETE
Severity:	normal	CC:	akpm, alan, brian, bugzilla, lamarque, marcel, oakad
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	2.6.31	Subsystem:
Regression:	Yes	Bisected commit-id:
Attachments:	changes to get the mx900 working correctly log of the mouse working correctly log of the mouse not working properly lsudb of the bluetooth module in the computer

Description Anthony Waters 2009-05-15 00:46:18 UTC

Created attachment 21360 [details]
changes to get the mx900 working correctly

Here is a good description of the issue

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=518467

basically instead of moving smoothly the mouse stutters around as if the computer is not receiving all of the packets

Works fine in 2.6.25 but was broken in 2.6.27 (still broken in 2.6.30-rc5), therefore, I did a 
git bisect start -- net/bluetooth
git bisect bad v2.6.27
git bisect good v2.6.25

and eventually it winded down to the bad commit at
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=e4e8e37c42bdaaefcb84eeaef0dc1bc3f696f8f6

So I tried undoing a couple of the changes and narrowed it down to a few places (attached in mx900.patch), which basically undoes the commit's purpose - therefore it was only for my use to narrow down where the breakage occurred (and to have my mouse work in the mean time)

Comment 1 Anthony Waters 2009-05-15 00:47:23 UTC

Created attachment 21361 [details]
log of the mouse working correctly

this is a log of the mouse working correctly, I used the dynamic debug with bluetooth, hci, and hidp modules set to log, and it was taken from dmesg

Comment 2 Anthony Waters 2009-05-15 00:48:07 UTC

Created attachment 21362 [details]
log of the mouse not working properly

this is a log of the mouse not working properly, used dynamic debug with the modules bluetooth, hci, and hidp to set to log, taken from dmesg

Comment 3 Anthony Waters 2009-05-15 00:48:36 UTC

Created attachment 21363 [details]
lsudb of the bluetooth module in the computer

lsudb of the bluetooth module in the computer

Comment 4 Anthony Waters 2009-05-15 00:50:01 UTC

thanks for taking a look

Comment 5 Andrew Morton 2009-05-15 01:06:53 UTC

Thanks, but we're poorly set up for handling, reviewing and merging patches via bugzilla.

Could you please formulate this report and description as a patch and email it to

linux-bluetooth@vger.kernel.org
linux-kernel@vger.kernel.org
Andrew Morton <akpm@linux-foundation.org>

(it doesn't matter if the patch is "wrong" - it gives me something to hang onto
so the issue doesn't get forgotten)
?

Comment 6 Anthony Waters 2009-05-20 00:36:26 UTC

yup I can do that, it may be a while because I have to review patch submission guidelines, but I will definitely do it

Comment 7 Lamarque V. Souza 2009-07-22 00:54:07 UTC

Hi,

Any news about this patch? My bluetooth mouse is also affected by http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=e4e8e37c42bdaaefcb84eeaef0dc1bc3f696f8f6 change. I have reverted that change in my 2.6.30.2 kernel and my mouse (0458:0058) works well now.

Comment 8 Alex Dubov 2009-12-29 19:29:13 UTC

I've got the same mouse as previous poster, and can confirm that the problem is still present in 2.6.31.

Comment 9 Alan 2012-06-07 10:42:10 UTC

Closing as obsolete, if present versus a recent kernel please re-open