How to enable FM transmitter? (Solution in thread) - Page 3 - maemo.org

Blobster2k | # 21 | 2010-01-02, 09:34 | Report

@Ads - where did you get your n900 from?

i brought mine from the NFS on regent st. and the transmitter works perfectly. AFAIK short range fm broadcasts are not illegal hence the low power of the transmitter.

sgbirch | # 22 | 2010-01-02, 09:49 | Report

Originally Posted by Ads View Post

Hi. any luck with this? I have only just found this thread, but I live in the UK with a disabled transmitter

I have a UK version of the N900 and its transmitter works fine.

Are you trying the transmitter with the USB cable unplugged? The N900 significantly reduces power when the USB is used, the following link shows how to keep it at full power:

https://bugs.maemo.org/show_bug.cgi?id=6792#c9

noobmonkey | # 23 | 2010-01-02, 09:51 | Report

Originally Posted by Ads View Post

Having a further dig about, would I be going too far to suggest that the kernel could have been compiled with the fm transmitter configuration turned off? Would that be part of the firmware we install? I.e. different in each country/region, or would this be something else? For example, I'm in the UK, so am I running an odd bit of software to have mine disabled or could I just be looking at some common garden fault?

Got mine from MPD - in the UK, transmitter works fine.

giannoug | # 24 | 2010-01-02, 09:57 | Report

Originally Posted by sgbirch View Post

I have a UK version of the N900 and its transmitter works fine.

Are you trying the transmitter with the USB cable unplugged? The N900 significantly reduces power when the USB is used, the following link shows how to keep it at full power:

https://bugs.maemo.org/show_bug.cgi?id=6792#c9

No. FM transmitter doesn't work at all. When you click the "FM transmitter" button on the Settings panel, a popup shows up with "FM transmitter disabled" and a "OK" button.

My other thought is that "something" is checking the IMEI. The first two digits are a country "code". For example 35 is for Greece, etc.

sgbirch | # 25 | 2010-01-02, 10:38 | Report

Originally Posted by giannoug View Post

No. FM transmitter doesn't work at all. When you click the "FM transmitter" button on the Settings panel, a popup shows up with "FM transmitter disabled" and a "OK" button.

Try using the media player to play some audio then click the top of the screen to bring up the application menu. That causes several buttons to open. Click on "FM transmitter" and try enabling it on that menu.

anapospastos | # 26 | 2010-01-02, 10:52 | Report

Originally Posted by sgbirch View Post

Try using the media player to play some audio then click the top of the screen to bring up the application menu. That causes several buttons to open. Click on "FM transmitter" and try enabling it on that menu.

No it's not working. I ve got a greek device too. Fm transmitter is disabled by the manufacturer. Anyone to help somehow?

giannoug | # 27 | 2010-01-02, 10:55 | Report

Originally Posted by sgbirch View Post

Try using the media player to play some audio then click the top of the screen to bring up the application menu. That causes several buttons to open. Click on "FM transmitter" and try enabling it on that menu.

Yeap, I've tried that. It only shows "Clear current playlist" and "Save playlist"

Does anyone know how to change the IMEI? Well.. I'm willing to try it

Originally Posted by qwerty12 View Post

What does this program return for you, people with a disabled transmitter?

Well.. I only ran this because you have many posts..

Code:

Nokia-N900-42-11:~# ./a.out
fcc

Last edited by giannoug; 2010-01-02 at 10:59.

qwerty12 | # 28 | 2010-01-02, 11:03 | Report

Originally Posted by giannoug View Post

Well.. I only ran this because you have many posts..

Code:

Nokia-N900-42-11:~# ./a.out
fcc

Hehe...

It returns "fcc" for me, too. Which is odd, because I was sure that was how they were disabling it (checking to see the region and then writing it to the sysfs entry); excerpt from the kernel driver:

PHP Code:


			
+int si4713_set_region_preemphasis(struct si4713_device *sdev, u8 preemphasis)

+{

+    int rval = 0;

+

+    switch (preemphasis) {

+    case PREEMPHASIS_USA:

+        preemphasis = FMPE_USA;

+        break;

+    case PREEMPHASIS_EU:

+        preemphasis = FMPE_EU;

+        break;

+    case PREEMPHASIS_DISABLED:

+        preemphasis = FMPE_DISABLED;

+        break;

+    default:

+        return -EINVAL;

+    }

+

And, then, when reading http://en.wikipedia.org/wiki/Pre-emphasis, it all made sense...

Best thing to do is attach a ltrace and strace log of fmtxd. Maybe someone can help you.

The Following User Says Thank You to qwerty12 For This Useful Post:
giannoug

maxximuscool | # 29 | 2010-01-02, 11:23 | Report

I've got the North America N900 and mine is working

, everything working perfectly. Even my battery last me more than 24hours with my quite heavy usage. About 4days of Idle or very little use.

giannoug | # 30 | 2010-01-02, 11:51 | Report

More info on this:
When you run

Code:

Nokia-N900-42-11:~# fmtx_client -f88500

returns

Code:

fmtx_client: ERROR: Unable to set frequency (Frequency is not currently allowed)