iwl3945 filling kern.log when HW switch is off

iwl3945 filling kern.log when HW switch is off

[Dietmar Rudolph]

Hello, I hope this is the correct place to put a bug report in. I do 
not subscribe to this mailing list, but feel free to send PM in case 
you need additional info. You shoudn't :-)

After installing Ubuntu 13.10, I noticed kern.log growing faster 
than you could look at. Within a few working hours, kern.log was >6GB!

The reason is that I intentionally disabled WiFi on this laptop by 
turning the HW switch off. However, this makes iwl3945 write a log 
entry into kern.log every few microseconds!

The workaround is to turn the HW switch on. The bug fix would be to 
write just a single line to kern.log.

Regards
Dietmar

- - - from kern.log:

Oct 22 18:28:52 C50 kernel: [  141.144085] iwl3945 0000:02:00.0: 
Radio disabled by HW RF Kill switch
Oct 22 18:28:52 C50 kernel: [  141.144214] iwl3945 0000:02:00.0: 
Radio disabled by HW RF Kill switch
Oct 22 18:28:52 C50 kernel: [  141.145167] iwl3945 0000:02:00.0: 
Radio disabled by HW RF Kill switch
Oct 22 18:28:52 C50 kernel: [  141.145304] iwl3945 0000:02:00.0: 
Radio disabled by HW RF Kill switch
Oct 22 18:28:52 C50 kernel: [  141.146184] iwl3945 0000:02:00.0: 
Radio disabled by HW RF Kill switch
Oct 22 18:28:52 C50 kernel: [  141.146315] iwl3945 0000:02:00.0: 
Radio disabled by HW RF Kill switch
Oct 22 18:28:52 C50 kernel: [  141.147164] iwl3945 0000:02:00.0: 
Radio disabled by HW RF Kill switch
Oct 22 18:28:52 C50 kernel: [  141.147304] iwl3945 0000:02:00.0: 
Radio disabled by HW RF Kill switch
Oct 22 18:28:52 C50 kernel: [  141.148254] iwl3945 0000:02:00.0: 
Radio disabled by HW RF Kill switch
Oct 22 18:28:52 C50 kernel: [  141.148387] iwl3945 0000:02:00.0: 
Radio disabled by HW RF Kill switch
Oct 22 18:28:52 C50 kernel: [  141.149217] iwl3945 0000:02:00.0: 
Radio disabled by HW RF Kill switch
Oct 22 18:28:52 C50 kernel: [  141.149347] iwl3945 0000:02:00.0: 
Radio disabled by HW RF Kill switch
Oct 22 18:28:52 C50 kernel: [  141.150165] iwl3945 0000:02:00.0: 
Radio disabled by HW RF Kill switch
Oct 22 18:28:52 C50 kernel: [  141.150294] iwl3945 0000:02:00.0: 
Radio disabled by HW RF Kill switch
Oct 22 18:28:52 C50 kernel: [  141.151113] iwl3945 0000:02:00.0: 
Radio disabled by HW RF Kill switch
Oct 22 18:28:52 C50 kernel: [  141.151243] iwl3945 0000:02:00.0: 
Radio disabled by HW RF Kill switch
Oct 22 18:28:52 C50 kernel: [  141.152097] iwl3945 0000:02:00.0: 
Radio disabled by HW RF Kill switch
Oct 22 18:28:52 C50 kernel: [  141.152227] iwl3945 0000:02:00.0: 
Radio disabled by HW RF Kill switch


-- 
Dietmar Rudolph
Geschäftsführer/President

CR/LF GmbH
Obere Fuhr 27, 45136 Essen, Germany
phone: ++49 201 254566
mailto: dietmar@crlf.de, http://www.crlf.de

CR/LF Beratungsgesellschaft für EDV-Anwendungen mbH
Essen HRB 7016 - GF: Dipl.-Math. Dietmar Rudolph

Re: iwl3945 filling kern.log when HW switch is off

[Stanislaw Gruszka]

On Wed, Oct 23, 2013 at 11:24:49AM +0200, Dietmar Rudolph wrote:
> Hello, I hope this is the correct place to put a bug report in. I do
> not subscribe to this mailing list, but feel free to send PM in case
> you need additional info. You shoudn't :-)
> 
> After installing Ubuntu 13.10, I noticed kern.log growing faster
> than you could look at. Within a few working hours, kern.log was
> >6GB!
> 
> The reason is that I intentionally disabled WiFi on this laptop by
> turning the HW switch off. However, this makes iwl3945 write a log
> entry into kern.log every few microseconds!
> 
> The workaround is to turn the HW switch on. The bug fix would be to
> write just a single line to kern.log.

This message is printed when someone try to UP device when RF kill
switch is on. Either you did not compile kernel with CONFIG_RFKILL or
your user space network management software does not handle rfkill .

Stanislaw

Re: iwl3945 filling kern.log when HW switch is off

[Dan Williams]

On Thu, 2013-10-24 at 13:27 +0200, Stanislaw Gruszka wrote:
> On Wed, Oct 23, 2013 at 11:24:49AM +0200, Dietmar Rudolph wrote:
> > Hello, I hope this is the correct place to put a bug report in. I do
> > not subscribe to this mailing list, but feel free to send PM in case
> > you need additional info. You shoudn't :-)
> > 
> > After installing Ubuntu 13.10, I noticed kern.log growing faster
> > than you could look at. Within a few working hours, kern.log was
> > >6GB!
> > 
> > The reason is that I intentionally disabled WiFi on this laptop by
> > turning the HW switch off. However, this makes iwl3945 write a log
> > entry into kern.log every few microseconds!
> > 
> > The workaround is to turn the HW switch on. The bug fix would be to
> > write just a single line to kern.log.
> 
> This message is printed when someone try to UP device when RF kill
> switch is on. Either you did not compile kernel with CONFIG_RFKILL or
> your user space network management software does not handle rfkill .

Though maybe it shouldn't actually print a dmesg error when that
happens?  Lots of software (scripts included) might try to open the
device but not really know much about rfkill...  Is there a way to print
it once-per-rfkill instead maybe?

Dan

Re: iwl3945 filling kern.log when HW switch is off

[Stanislaw Gruszka]

On Thu, Oct 24, 2013 at 09:48:01AM -0500, Dan Williams wrote:
> On Thu, 2013-10-24 at 13:27 +0200, Stanislaw Gruszka wrote:
> > On Wed, Oct 23, 2013 at 11:24:49AM +0200, Dietmar Rudolph wrote:
> > > Hello, I hope this is the correct place to put a bug report in. I do
> > > not subscribe to this mailing list, but feel free to send PM in case
> > > you need additional info. You shoudn't :-)
> > > 
> > > After installing Ubuntu 13.10, I noticed kern.log growing faster
> > > than you could look at. Within a few working hours, kern.log was
> > > >6GB!
> > > 
> > > The reason is that I intentionally disabled WiFi on this laptop by
> > > turning the HW switch off. However, this makes iwl3945 write a log
> > > entry into kern.log every few microseconds!
> > > 
> > > The workaround is to turn the HW switch on. The bug fix would be to
> > > write just a single line to kern.log.
> > 
> > This message is printed when someone try to UP device when RF kill
> > switch is on. Either you did not compile kernel with CONFIG_RFKILL or
> > your user space network management software does not handle rfkill .
> 
> Though maybe it shouldn't actually print a dmesg error when that
> happens?  Lots of software (scripts included) might try to open the
> device but not really know much about rfkill...  Is there a way to print
> it once-per-rfkill instead maybe?

I'll just remove this message. We can return ERFKILL error instead.
That will allow user to identify problem without message.

Thanks
Stanislaw