Return-Path: Subject: Re: [Bluez-users] disappointed with my MX900 battery life From: Charles Bueche To: Marcel Holtmann Cc: BlueZ Mailing List In-Reply-To: <1073583568.2563.29.camel@pegasus> References: <1073555620.5632.8.camel@bluez.bueche.ch> <1073583568.2563.29.camel@pegasus> Content-Type: text/plain Message-Id: <1073636191.8413.743.camel@bluez.bueche.ch> Mime-Version: 1.0 Date: Fri, 09 Jan 2004 09:16:31 +0100 List-ID: 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 sand, snow, wave, wind and net -surfer