added another page (ouch! my "Four Years Anniversary" page! I own
a P900 since 2003!)
weird: the internal charging circuitry of my P900 seems not to
be definitively broken. I can now charge batteries (the original one
and the "Chinese clone" one)... they will last no
more two or three hours (and no more than 5-10 minutes phone talk)
but at least it is not yet time to buy my next smartphone. Alas,
I now lack a long-lasting MP3 player (and I cannot get back the
iPod shuffle I donated to my sister a few months ago)...
added another page:
P900 is better than Apple iPhone (yes, I mean it);
I am investigating about buying a smartphone capable of making me
forget the P900... and there is at least a dozen of reasons why I
won't buy an Apple "iPhone". Time to switch to a Sony Ericsson P990?
Or, better, go for some Linux-based one? Mumble, mumble, mumble...
March 2007: it seems that the charging circuit is broken, I cannot
charge batteries. Fortunately, I can keep the P900 on (and even place
calls) using a spare 5.8V 130mA power supply, which does not charge
batteries but is sufficient to keep on the phone (WARNING: I strictly
discourage you to do that for more than 1-2 hours! internal charging
circuit is easily broken if you don't use a 100% compatible charger!).
November 2006: I had the P900 serviced again. An authorized
Sony Ericsson center asked me 15 (fifteen) euros for "updating P900
firmware". The P900 didn't boot (black screen at boot, no signs of life).
This is the second time in its life that I had to service it, and - this
time also - servicing was needed because its firmware crashed.
for some weird reason, I found my P900 enabling port 4 instead of
port 3 when using nfsapp - so I had to change my script to connect from
the Linux box to the P900 running nfsapp - the only change is the last
parameter of "rfcomm bind" command; the "sleep 9" seconds pause is only
to let me turn down the jog-dial (because almost always I forget to do) :-)
if [ $UID != 0 ]
echo -- error: in SuSE Linux 9.1 you need to start this script from root
ls -al /dev/rfcomm0
rfcomm release /dev/rfcomm0
rfcomm bind /dev/rfcomm0 00:0A:D9:E8:2F:1F 4
echo -- did you start NFSAPP and turned down the wheel to wait for a Bluetooth connection?
p3nfsd -UIQ -tty /dev/rfcomm0 -dir /mnt
a minor problem for mounting P900 directories with p3nfsd and
nfsapp 2.6: it seems that long Bluetooth latency times stuck nfsapp
(for example, I wasn't able to copy a 0.9 megabytes MP3 file onto the
P900 when it was 4mt far from the PC bluetooth antenna). Yes, the best
transfer speed is when the P900 is near the PC antenna (in my case,
a few centimeters far from my USB-Bluetooth adapter). If you place the
P900 at 50cm or more, you will see the transfer speed dropping from
25-30 kbytes/sec (usual; maximum is 35 kb/sec) to 8-13 kbytes/sec or
even less (it's not nice to transfer 25 megabytes of MP3 files at
8 kb/sec, while draining the same amount of battery
I think this isn't due to the low (quite low) power signal of the P900
bluetooth hardware, but to the hardwired timeouts of the old nfsapp
2.6 (and currently I'm just too lazy to upgrade it) :-)
well, yes, while streaming bluetooth data (for example, sending a .SIS
package with kbtobexclientKDE program), you can still connect to
the internet (using the Bluetooth channel). The P900 will handle it as
expected. For some unknown reason, kbtobexclient doesn't like to start
when the bluetooth/internet-GPRS connection is already active (but if you
start streaming the .SIS first, you will succeed).
Bluetooth: paired with a Compaq iPaq H2200 series; I sent him a
but the iPaq marked it as "unrecognized format"; I also sent him a lenghty
animated GIF image but its Windows Media Player was SLOWER
than the P900's player! AIEEEE!
Bluetooth again: while transferring some megabytes of MP3 files from the PC
to the P900, I received a phone call and walked around for half an hour. The
data transfer continued without problems (YAY!) and the overall throughput
went down from 33-35 kb/sec to 8-10 kb/sec, but this is due to the distance
(I walked 6-7 meters far away the notebook computer).
problems with p3nfsd? can't you understand how to connect via infrared?
problems using bluetooth? well, don't complain... Sebastian wrote me from
Austria: "Buy a simple media reader and you can transfer all data to the
memory card in a second :-) Works for me. Saves time. Don't have to fiddle
with the infrared of your notebook. No longer have to shout at my notbook any
I definitively encourage you to write your own P900 & Linux tech experiences
on the internet. Set up an home page, shoot a couple of weird P900 photos,
place it somewhere with a "last updated on..." note, and add it to a number
of search engines (if you are in a hurry). Let's exchange our links (I don't
want to be the only source of information, neither the most complete
source) and let Sony Ericsson see that Linux community is not as small as
their commercial guys erroneously think.
A technically decent P900 internet resource page, even if limited to one
single Linux question, is always a serious source of useful information;
while the P900 mailing-list (as almost any other mailing-list)
is "googleable", it's quite hard to find out what one was searching for
(because of quoting, questions, partial answers, etc). You don't have to
be a "P900 guru", neither you need to be absolutely original, nor you need
to cover any possible remote issue; just describe exactly how did you get
something running, having in mind the user who just opened his brand new
P900 package box. For this reason, I added a number of silly (oops) notes
to let a new user proceed without too much fear between mysterious numbers
Simply said, I "became an user", not anymore a P900 hacker/programmer.
My P900 simply does what I want (including running my own programs).
I am quite busy and I don't have time anymore to experiment, write new
software, write extra internet pages, etc.
Yes, I'm a P900 user, now. I happen to check email while waiting
for the Holy Mass to begin O:-) ...I happen to see buildings and
concrete and jot down graphics schemes and add text description to
my ideas :-) ...I chat with girls (MSN, not human voice) while in
the train :-) ...or send them (live) some MP3/JPEG over a bluetooth
connection :-) ...I get up every morning with my favourite MP3's
(including my own voice: "Heeeeeeey! Hurry up!!!") :-) ...I plan
a day schedule using also my timetables software:-) ...I have a modem everywhere for my notebook (even in the bus)
:-) ...And -sometimes- I even have to allow the P900 to interrupt
the MP3 playing to answer to a phone call :-)
I don't feel any need to upgrade to a P910. Also, I'm simply too happy
with my P900 (except, obviously, for some small unresolved bugs in its
firmware and operating system) and so I don't want to upgrade to a "3G"
superbells & superwhistles forthcoming P990i (except if it was a
native Linux machine). Also, I still can't see anywhere a reasonably
priced phone+PDA+quality solution. My friends who have some
"bells & whistles" PDA still need to carry up also a phone; other
friends, who have a Nokia or Motorola communicator, still need to
carry a large and fat plastic chunk, and yet cannot do more than
I do ;-)