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Emanuele Santoro | 11 Dec 2008 18:05
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HP Jornada 728 for everyday life?

Hello  <at>  all,
i've just subscribed to this list.

I'm about to buy an HP Jornada 728, planning to use it with NetBSD 5.0.
Well, i have to ask some questions before buying.

- How much extended  battery life lasts? I red that batteries
  allows up to 14 hours of life. Is this true ? If not, how much the
  battery *really* lasts using it with NetBSD ?
  Are suspend to disk and similar processes supported?

- What is better for battery life, microdrives os compact flash cards?

- I plan to use a 4 or 8 GB compact flash card. Will it be supported by the
  jornada 728?

- I've read that serial cable and IrDA port aren't currently supported
  on the Jornada 728. Is that true ?

- Using wireless, are there any limitations? I plan to use it at home
  (wpa/tkip pre shares key) and at school (open network! :-D), but not
  only: can i do wireless sniffing, packet capturing and similar things
  with a pcmcia wireless card?

- I thougt to use the 728 to connect to my home network sometimes,
  using somthing as OpenVPN or Vtun, and to sync my data with rsync or
  something similar. Do you think it is possible?

- Using OpenVPN or Vtun, i plan to mount a remote NFS resource (a shared
  hard disk on my home server, about 250 GB). Would it be possible ?
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Alexander Frolkin | 11 Dec 2008 21:40
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Re: HP Jornada 728 for everyday life?

Hi,

> - How much extended  battery life lasts? I red that batteries
>   allows up to 14 hours of life. Is this true ? If not, how much the
>   battery *really* lasts using it with NetBSD ?

I have a Jornada 720 and that lasts a little over 2 hours on battery with
a wireless card.  I'm not sure whether that has anything to do with the
fact that the battery is quite old.

> - What is better for battery life, microdrives os compact flash cards?

The Jornada 720 doesn't take Microdrives --- are you sure the 728 does?

> - Using wireless, are there any limitations? I plan to use it at home
>   (wpa/tkip pre shares key) and at school (open network! :-D), but not
>   only: can i do wireless sniffing, packet capturing and similar things
>   with a pcmcia wireless card?

I have a Cisco Aironet 350 (an(4) driver).  Remember that you need a
16-bit card --- I don't think you can get 16-bit 802.11g cards.  I have
a few problems with the card --- ifconfig an0 list scan just sits there
and does nothing, although I did have wistumbler2 working at one point.
Also, wpa_supplicant doesn't seem to work.

> - I thougt to use the 728 to connect to my home network sometimes,
>   using somthing as OpenVPN or Vtun, and to sync my data with rsync or
>   something similar. Do you think it is possible?

I don't see why not.
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Valeriy E. Ushakov | 11 Dec 2008 23:20
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Re: HP Jornada 728 for everyday life?

On Thu, Dec 11, 2008 at 18:05:35 +0100, Emanuele Santoro wrote:

> - Using wireless, are there any limitations? I plan to use it at home
>   (wpa/tkip pre shares key) and at school (open network! :-D), but not
>   only: can i do wireless sniffing, packet capturing and similar things
>   with a pcmcia wireless card?

Finding real pcmcia, 16-bit wifi card (not 32-bit cardbus) might prove
to be a problem.  Old ones probably don't support WPA.  You can
reflash a PRISM card with newer firmware that does support WPA, but
unfortunately NetBSD wi(4) driver has not been converted to support
it.

> - May I use GNU Emacs on the 728 or is it too heavy?

728 has 64MB of RAM, which should be plenty.  I really don't
udnerstand why people think emacs is too heavy :)

> - How is APM/ACPI supported? What about standby and/or suspend to disk?

As far as I can tell it's not possible to support proper suspend in
principle for the 7xx series.  The problem is that ARM CPU wakes up by
doing a kind of reset, jumping to memory address 0, where WinCE ROM is
located (and it is really read-only), so there's no way you can handle
wake up.

SY, Uwe
--

-- 
uwe <at> stderr.spb.ru                       |       Zu Grunde kommen
http://snark.ptc.spbu.ru/~uwe/          |       Ist zu Grunde gehen
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otto.waltari | 12 Dec 2008 06:24
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Re: HP Jornada 728 for everyday life?

"Valeriy E. Ushakov" [uwe <at> stderr.spb.ru] wrote: 
> On Thu, Dec 11, 2008 at 18:05:35 +0100, Emanuele Santoro wrote:
> 
> > - Using wireless, are there any limitations? I plan to use it at home
> >   (wpa/tkip pre shares key) and at school (open network! :-D), but not
> >   only: can i do wireless sniffing, packet capturing and similar things
> >   with a pcmcia wireless card?
> 
> Finding real pcmcia, 16-bit wifi card (not 32-bit cardbus) might prove
> to be a problem.  Old ones probably don't support WPA.  You can
> reflash a PRISM card with newer firmware that does support WPA, but
> unfortunately NetBSD wi(4) driver has not been converted to support
> it.

As far as I know, Cisco Aironet 350 series support WPA, and atleast
AIR-PCM352 member of the family is a 16bit card. Works great, but
I don't know about WPA support on the software side. Never had to
deal with it.

> > - How is APM/ACPI supported? What about standby and/or suspend to disk?
> 
> As far as I can tell it's not possible to support proper suspend in
> principle for the 7xx series.  The problem is that ARM CPU wakes up by
> doing a kind of reset, jumping to memory address 0, where WinCE ROM is
> located (and it is really read-only), so there's no way you can handle
> wake up.

Which turns out to be a quite annoying issue. Originally the device was designed
to suspend by taking the power off everything except the RAM, in order to keep
it's state. When the device is then turned back on, all the ram is there and the state
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David Brownlee | 16 Dec 2008 13:23
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Re: HP Jornada 728 for everyday life?

From:  <otto.waltari <at> kolumbus.fi>

> "Valeriy E. Ushakov" [uwe <at> stderr.spb.ru] wrote: 
> > On Thu, Dec 11, 2008 at 18:05:35 +0100, Emanuele Santoro wrote:
> > As far as I can tell it's not possible to support proper suspend in
> > principle for the 7xx series.  The problem is that ARM CPU wakes up by
> > doing a kind of reset, jumping to memory address 0, where WinCE ROM is
> > located (and it is really read-only), so there's no way you can handle
> > wake up.
> 
> Which turns out to be a quite annoying issue. Originally the device was 
designed
> to suspend by taking the power off everything except the RAM, in order to 
keep
> it's state. When the device is then turned back on, all the ram is there 
and the state
> returns to where it was when we powered off. But while running a 
different os, the
> WinCE loader at 0 has no clue about anything else than it's own business. 
Due to
> the nature of ROM, the WinCE loader cannot be overwritten. 
> 

If someone is really motivated there is another option - implement 
hibernate:
 - save the state to flash and power off
 - have wince run the NetBSD bootloader on start
 - have the NetBSD bootloader check for and load the saved state

You need to have real pmf support for the hardware so device state can be
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Gmane