[Bluez-users] disappointed with my MX900 battery life

[Bluez-users] disappointed with my MX900 battery life

[Charles Bueche]

Hi,

I'm using the CVS version of libs2 and utils2, with my MX900. I have the
impression that the MX900 batteries don't last very long between two
charging cycles (2-3 days). Can other here confirm this ?

I must explain that I use my MX900 without the docking (with a laptop
underway), so I only dock the mouse to load it when it blink red.

And being with empty batteries underway leaves me with the poor
touchpad.

Any better experience under Window$ ? Is some optimization possible in
the code to better use the "standby" modes of the MX900 ?

Charles

-- 
Charles Bueche <charles@bueche.ch>
sand, snow, wave, wind and net -surfer



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Re: [Bluez-users] disappointed with my MX900 battery life

[Marcel Holtmann]

Hi Charles,

> I'm using the CVS version of libs2 and utils2, with my MX900. I have the
> impression that the MX900 batteries don't last very long between two
> charging cycles (2-3 days). Can other here confirm this ?
> 
> I must explain that I use my MX900 without the docking (with a laptop
> underway), so I only dock the mouse to load it when it blink red.
> 
> And being with empty batteries underway leaves me with the poor
> touchpad.
> 
> Any better experience under Window$ ? Is some optimization possible in
> the code to better use the "standby" modes of the MX900 ?

the HID specification is clear about that the HID device itself must
take care about its power consumption. What is your link policy? Maybe
the sniff mode is not enabled. On the other hand the Apple Bluetooth
mouse never uses sniff mode to save power. Run a hcidump and check what
your mouse is doing.

Regards

Marcel




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Re: [Bluez-users] disappointed with my MX900 battery life

[Charles Bueche]

Hi Marcel,

On Thu, 2004-01-08 at 18:39, Marcel Holtmann wrote:
> Hi Charles,
> 
> > I'm using the CVS version of libs2 and utils2, with my MX900. I have the
> > impression that the MX900 batteries don't last very long between two
> > charging cycles (2-3 days). Can other here confirm this ?
> > 
> > I must explain that I use my MX900 without the docking (with a laptop
> > underway), so I only dock the mouse to load it when it blink red.
> > 
> > And being with empty batteries underway leaves me with the poor
> > touchpad.
> > 
> > Any better experience under Window$ ? Is some optimization possible in
> > the code to better use the "standby" modes of the MX900 ?
> 
> the HID specification is clear about that the HID device itself must
> take care about its power consumption. What is your link policy? Maybe
> the sniff mode is not enabled. 

looks like it is :

hci0:   Type: USB 
        BD Address: 00:10:C6:22:54:AF ACL MTU: 192:8  SCO MTU: 64:8
        UP RUNNING PSCAN ISCAN 
        RX bytes:155055 acl:10298 sco:0 events:75 errors:0
        TX bytes:851 acl:22 sco:0 commands:15 errors:0
        Features: 0xff 0xff 0x0f 0x00
        Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3 
        Link policy: RSWITCH HOLD SNIFF PARK 
        Link mode: SLAVE ACCEPT 
        Name: 'laptopcb (0)'
        Class: 0x000100
        Service Classes: Unspecified
        Device Class: Computer, Uncategorized
        HCI Ver: 1.1 (0x1) HCI Rev: 0x235 LMP Ver: 1.1 (0x1) LMP Subver:
0x235
        Manufacturer: Cambridge Silicon Radio (10)

> On the other hand the Apple Bluetooth
> mouse never uses sniff mode to save power. Run a hcidump and check what
> your mouse is doing.

I left hcidump running for a while (~15 min) and I saw it doing a change
mode :

1073632217.880298 > HCI Event: Mode Change(0x14) plen 6
1073632217.892269 > HCI Event: Mode Change(0x14) plen 6

....time goes a bit

1073632832.674873 > HCI Event: Mode Change(0x14) plen 6
1073632832.688834 > HCI Event: Mode Change(0x14) plen 6

....time goes a bit

1073633988.937287 < ACL data: handle 0x0029 flags 0x02 dlen 12
    L2CAP(s): Disconn req: dcid 0x0043 scid 0x0040
1073633989.189536 > HCI Event: Number of Completed Packets(0x13) plen 5
1073633989.583548 > ACL data: handle 0x0029 flags 0x02 dlen 12
    L2CAP(s): Disconn rsp: dcid 0x0043 scid 0x0040
1073633989.585550 > ACL data: handle 0x0029 flags 0x02 dlen 12
    L2CAP(s): Disconn req: dcid 0x0041 scid 0x0044
1073633989.585577 < ACL data: handle 0x0029 flags 0x02 dlen 12
    L2CAP(s): Disconn rsp: dcid 0x0041 scid 0x0044
1073633989.596539 > HCI Event: Mode Change(0x14) plen 6
1073633989.598508 > HCI Event: Number of Completed Packets(0x13) plen 5
1073633989.645541 > HCI Event: Mode Change(0x14) plen 6
1073633989.883553 > HCI Event: Mode Change(0x14) plen 6
1073633989.970552 > HCI Event: Disconn Complete(0x05) plen 4

Can you interpret this ? Looks like Klingon to me :-)

Charles

-- 
Charles Bueche <charles@bueche.ch>
sand, snow, wave, wind and net -surfer

Re: [Bluez-users] disappointed with my MX900 battery life

[Marcel Holtmann]

Hi Charles,

> > On the other hand the Apple Bluetooth
> > mouse never uses sniff mode to save power. Run a hcidump and check what
> > your mouse is doing.
> 
> I left hcidump running for a while (~15 min) and I saw it doing a change
> mode :
> 
> 1073632217.880298 > HCI Event: Mode Change(0x14) plen 6
> 1073632217.892269 > HCI Event: Mode Change(0x14) plen 6
> 
> ....time goes a bit
> 
> 1073632832.674873 > HCI Event: Mode Change(0x14) plen 6
> 1073632832.688834 > HCI Event: Mode Change(0x14) plen 6
> 
> Can you interpret this ? Looks like Klingon to me :-)

run the hcidump with "-x" to see that packet content, but in general it
changes to sniff mode and so power saving works.

Regards

Marcel




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Re: [Bluez-users] disappointed with my MX900 battery life

[Olivier Bornet]

[-- Attachment #1: Type: text/plain, Size: 826 bytes --]

Hi Charles,

> I'm using the CVS version of libs2 and utils2, with my MX900. I have the
> impression that the MX900 batteries don't last very long between two
> charging cycles (2-3 days). Can other here confirm this ?

I don't have make stats, but I will do and keep you informed. But I
think I'm charging about 1 time per week.

Try with other batteries, as it seems some batteries in the Logitech
devices has problems.

> I must explain that I use my MX900 without the docking (with a laptop
> underway), so I only dock the mouse to load it when it blink red.

Same for me: I dock only when it red  blink.

Good day.

		Olivier
-- 
Olivier Bornet                      http://www.smartdata.ch/
Olivier.Bornet@smartdata.ch         SMARTDATA SA
GPG key ID: C53D9218                CH Martigny/Lausanne

[-- Attachment #2: Digital signature --]
[-- Type: application/pgp-signature, Size: 189 bytes --]

RE: [Bluez-users] disappointed with my MX900 battery life

[Chris Hubball]

Hi,

I haven't tried with Bluez, but my MX900 works well with the Widcomm
stack.
After a full charge, left overnight, it lasts about a week.

A good way to test if it's Bluez, run the hub in HID mode i.e. don't
switch to HCI and see what the battery life is then.

Chris.


-----Original Message-----
From: bluez-users-admin@lists.sourceforge.net
[mailto:bluez-users-admin@lists.sourceforge.net] On Behalf Of Charles
Bueche
Sent: 08 January 2004 09:54
To: BlueZ Mailing List
Subject: [Bluez-users] disappointed with my MX900 battery life


Hi,

I'm using the CVS version of libs2 and utils2, with my MX900. I have the
impression that the MX900 batteries don't last very long between two
charging cycles (2-3 days). Can other here confirm this ?

I must explain that I use my MX900 without the docking (with a laptop
underway), so I only dock the mouse to load it when it blink red.

And being with empty batteries underway leaves me with the poor
touchpad.

Any better experience under Window$ ? Is some optimization possible in
the code to better use the "standby" modes of the MX900 ?

Charles

--=20
Charles Bueche <charles@bueche.ch>
sand, snow, wave, wind and net -surfer



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RE: [Bluez-users] disappointed with my MX900 battery life

[Alexander Holler]

Hello,

--On Donnerstag, Januar 08, 2004 10:24:03 +0000 Chris Hubball 
<Chris.Hubball@csr.com> wrote:

> I'm using the CVS version of libs2 and utils2, with my MX900. I have the
> impression that the MX900 batteries don't last very long between two
> charging cycles (2-3 days). Can other here confirm this ?

I can confirm that. I'm using both win (bt-stack) and linux (up to now 
usb-hid). I haven't tried it using only bt over a few days (i haven't had 
the time, configuring the bluez-hid under linux for every-day-operation).

Regards,

Alexander



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