[Bluez-users] Key bouncing

[Bluez-users] Key bouncing

[Edd Dumbill]

Hi,

I've noticed that if typing quickly on my Apple Bluetooth keyboard I
often get additional keypresses. For instance, 'mode' comes out as
'moddeo' sometimes.  This only affects me when my DLink dongle is in HCI
mode -- I get no issues when in HID mode.  I've seen this in kernels
2.6.9 and 2.6.10-rc1.

% hidd --show
00:50:F2:E2:A4:B1 HID Boot Device [045e:007c] connected [boot-protocol]
00:0A:95:39:0F:9E HID Boot Device [05ac:0209] connected [boot-protocol]

% hciconfig -a
hci0:   Type: USB
        BD Address: 00:0F:3D:38:D3:A8 ACL MTU: 192:8  SCO MTU: 64:8
        UP RUNNING PSCAN ISCAN
        RX bytes:118698 acl:7768 sco:0 events:201 errors:0
        TX bytes:1309 acl:42 sco:0 commands:20 errors:0
        Features: 0xff 0xff 0x8f 0x78 0x18 0x18 0x00 0x80
        Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
        Link policy: RSWITCH HOLD SNIFF PARK
        Link mode: SLAVE ACCEPT
        Name: 'saag-0'
        Class: 0x100100
        Service Classes: Object Transfer
        Device Class: Computer, Uncategorized
        HCI Ver: 1.2 (0x2) HCI Rev: 0x4d9 LMP Ver: 1.2 (0x2) LMP Subver:
0x4d9
        Manufacturer: Cambridge Silicon Radio (10)


-- Edd




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Re: [Bluez-users] Key bouncing

[Marcel Holtmann]

Hi Edd,

> I've noticed that if typing quickly on my Apple Bluetooth keyboard I
> often get additional keypresses. For instance, 'mode' comes out as
> 'moddeo' sometimes.  This only affects me when my DLink dongle is in HCI
> mode -- I get no issues when in HID mode.  I've seen this in kernels
> 2.6.9 and 2.6.10-rc1.
> 
> % hidd --show
> 00:50:F2:E2:A4:B1 HID Boot Device [045e:007c] connected [boot-protocol]
> 00:0A:95:39:0F:9E HID Boot Device [05ac:0209] connected [boot-protocol]

I have seen this only in boot protocol mode. If you apply the -mh patch
and use report protocol mode this should go away. However in the HID
mode the D-Link also uses the boot protocol and so there must be a way
to avoid it. At the moment I have no idea how to do this, but every
patch is welcome.

Regards

Marcel




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Re: [Bluez-users] Key bouncing

[Patrick]

I was just about to ask about this same issue. I don't recall when it 
started but certain key combinations give the undesired effect.

Trying to type "cd " too quickly always comes out "cdd c" for example.

I have a D-Link adaptor as well.

What do you mean by HID mode?

Edd Dumbill wrote:
> Hi,
> 
> I've noticed that if typing quickly on my Apple Bluetooth keyboard I
> often get additional keypresses. For instance, 'mode' comes out as
> 'moddeo' sometimes.  This only affects me when my DLink dongle is in HCI
> mode -- I get no issues when in HID mode.  I've seen this in kernels
> 2.6.9 and 2.6.10-rc1.
> 
> % hidd --show
> 00:50:F2:E2:A4:B1 HID Boot Device [045e:007c] connected [boot-protocol]
> 00:0A:95:39:0F:9E HID Boot Device [05ac:0209] connected [boot-protocol]
> 
> % hciconfig -a
> hci0:   Type: USB
>         BD Address: 00:0F:3D:38:D3:A8 ACL MTU: 192:8  SCO MTU: 64:8
>         UP RUNNING PSCAN ISCAN
>         RX bytes:118698 acl:7768 sco:0 events:201 errors:0
>         TX bytes:1309 acl:42 sco:0 commands:20 errors:0
>         Features: 0xff 0xff 0x8f 0x78 0x18 0x18 0x00 0x80
>         Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
>         Link policy: RSWITCH HOLD SNIFF PARK
>         Link mode: SLAVE ACCEPT
>         Name: 'saag-0'
>         Class: 0x100100
>         Service Classes: Object Transfer
>         Device Class: Computer, Uncategorized
>         HCI Ver: 1.2 (0x2) HCI Rev: 0x4d9 LMP Ver: 1.2 (0x2) LMP Subver:
> 0x4d9
>         Manufacturer: Cambridge Silicon Radio (10)
> 
> 
> -- Edd
> 
> 
> 
> 
> -------------------------------------------------------
> This SF.Net email is sponsored by:
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> LinuxWorld Reader's Choice Award Winner for best database on Linux.
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> Bluez-users mailing list
> Bluez-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/bluez-users/listinfo/bluez-users


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