invalid packet size with bluetooth keyboard

invalid packet size with bluetooth keyboard

[Bbo Wuff]

Dear all,

I have a Microsoft Sculpt Mobile Keyboard, which is a bluetooth
keyboard. It worked fine before, but since bluez 5.47 not anymore. And
I don't seem to be the only one:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=878181#15

Connecting works fine, but after some time (can be a few seconds, a few
minutes, or even up to an hour) it just doesn't take any input anymore.
Here the logs:

btmon -t
----------------------------
Bluetooth monitor ver 5.47
= Note: Linux version 4.13.11-1-ARCH (x86_64) 09:48:16.561451
= Note: Bluetooth subsystem version 2.22 09:48:16.561454
.............................................
> ACL Data RX: Handle 256 flags 0x02 dlen 14 #39 [hci0] 09:50:35.918767

Channel: 65 len 10 [PSM 0 mode 0] {chan 0}
a1 01 00 00 00 00 00 00 00 00 ..........

.............................................
.............................................
> HCI Event: Vendor (0xff) plen 7 #168 [hci0] 09:51:49.994675

Intel Bootup (0x02)
Zero: 0x00
Number of packets: 2
Source: Operational firmware (0x01)
Reset type: Soft software reset (0x02)
Reset reason: System exception (0x05)
DDC status: Persistent RAM (0x02)
> HCI Event: Vendor (0xff) plen 189 #169 [hci0] 09:51:49.997592

Intel System Exception (0x29)
invalid packet size
01 00 00 00 00 00 00 00 00 47 01 01 5c 2c 01 50 .........G..\,.P
e6 5e 0b 00 00 47 01 01 06 00 00 00 00 00 00 00 .^...G..........
00 00 00 00 00 00 00 00 ff 35 f3 b0 18 c5 bf b6 .........5......
c2 04 84 00 e0 1c 01 50 00 40 00 00 00 00 00 00 .......P.@......
00 00 00 00 04 00 00 00 02 00 00 00 05 00 00 00 ................
f8 ff 00 00 fc ff 00 00 f9 ff 00 00 14 00 00 50 ...............P
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 4c 1b 00 50 ............L..P
f8 ff 00 00 66 56 0b 00 5c 16 00 50 b0 8c 05 00 ....fV..\..P....
60 f1 00 00 00 00 00 00 00 00 00 00 00 00 00 00 `...............
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
ef ef ef ef ef ef ef ef ef ef ef ef ............

.............................................
.............................................
.............................................



I posted the bug also at:
https://bugs.archlinux.org/task/56277

How to deal with this problem?

Thanks and best regards
Wuff

Re: invalid packet size with bluetooth keyboard

[Luiz Augusto von Dentz]

Hi,

On Thu, Nov 9, 2017 at 1:27 PM, Bbo Wuff <bbo2adwuff@zoho.eu> wrote:
> Dear all,
>
> I have a Microsoft Sculpt Mobile Keyboard, which is a bluetooth
> keyboard. It worked fine before, but since bluez 5.47 not anymore. And
> I don't seem to be the only one:
> https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=878181#15

This seems a hardware fault, are you sure it is not due to a new
firmware or something? We haven't done any changes to HIDP in quite
some time, which btw is in the kernel so there is very little the
userspace can do to affect it.


-- 
Luiz Augusto von Dentz

Re: invalid packet size with bluetooth keyboard

[Bbo Wuff]

Hi,

You are right, not bluez bug.

See the firmware bug reports:
https://bugzilla.kernel.org/show_bug.cgi?id=197147
https://bugzilla.kernel.org/show_bug.cgi?id=197807

Sorry for the noise! Invalid packet size was the only error in the logs
that I saw.

Thanks!
Wuff


On Thu, 2017-11-09 at 21:15 +0200, Luiz Augusto von Dentz wrote:
> Hi,
> 
> On Thu, Nov 9, 2017 at 1:27 PM, Bbo Wuff <bbo2adwuff@zoho.eu> wrote:
> > Dear all,
> > 
> > I have a Microsoft Sculpt Mobile Keyboard, which is a bluetooth
> > keyboard. It worked fine before, but since bluez 5.47 not anymore.
> > And
> > I don't seem to be the only one:
> > https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=878181#15
> 
> This seems a hardware fault, are you sure it is not due to a new
> firmware or something? We haven't done any changes to HIDP in quite
> some time, which btw is in the kernel so there is very little the
> userspace can do to affect it.
> 
>