Re: HEAD 1.587 + airo bug

[Bill Moss <bmoss CLEMSON EDU>]

Dan Williams wrote:

> On Tue, 2005-10-25 at 17:39 -0400, Bill Moss wrote:
>  
>
> > A user running kernel-2.6.13-1.1532_FC4, wireless-tools-28-0.pre10.5, 
> > and the airo driver on an IBM T41 reported to me that he sees a 20 
> > second delay before a connection is attempted when NM resumes from sleep 
> > or when NM is stopped and restarted. I verified with 
> > kernel-2.6.13-1.1532_FC4, wireless-tools-28-0.pre10.5, on an IBM T42 
> > with a pcmcia card. The debug log shows
> >
> > Oct 25 08:02:04 localhost NetworkManager: <WARNING>       (): 
> > get_scan_results(): card returned too much scan info.
> > Oct 25 08:02:04 localhost NetworkManager: <information> errno is 61, 
> > res_buf_length is 4096
> > Oct 25 08:02:04 localhost NetworkManager: <WARNING>       (): 
> > nm_device_wireless_scan(eth2): get_scan_results() returned an error.
> >
> >    
>
> Bill,
>
> Can you try CVS?  I just committed code to ignore ENODATA (61) and treat
> it as an empty scan list.  That should fix the error here, let me know
> if it seems to work OK.
>
> Dan
>
>
>  
I tried the latest CVS but there was no change. Perhaps the airo driver 
is not playing nice with the latest wireless-tools.  If I restart NM 
using airo, it takes about 20 seconds for the NM to get a usable scan. 
For ipw2200 it takes about 2 seconds. I don't think we were seeing this 
before the latest wireless-tools and kernel upgrade. I'll ask Matt 
Saltzman to verify. Comments.

1. I tried various airo.c patches and NetworkManagerDevice.c patches 
including the one Dan submitted today, but got no change.

2. When I have Cisco and Intel wireless cards in my T42, NM is now only 
showing scans from the Cisco. Prior to today's CVS, I was always seeing 
scans in the NM menu from both cards. My preference would be to see only 
one scan. The only reason I used the Cisco 350 card is to hack airo.c.

3. On a side note, I ripped off minimal ethtool support from ipw2200 and 
put it in airo.c. I also patched NetworkManagerDevice.c to use ethtool 
support to detect association. These patches seem to work well with 
these two drivers.

--
Bill Moss
Professor, Mathematical Sciences
Clemson University