OLPC wireless startup at boot time
quozl at laptop.org
Wed Oct 20 04:41:53 EDT 2010
On Wed, Oct 20, 2010 at 01:14:33AM -0700, Hal Murray wrote:
> I just measured the pause at 20 seconds. Is there a reason for that delay?
> Why doesn't the WiFi LED turn on sooner?
When I tested this in the past few months ... avoiding NetworkManager an
sticking to shell commands, I could get reconnected after suspend in
about three to five seconds. Therefore I think that the problem is
related to NetworkManager.
> What is a "scan"?
# iwlist eth0 scan
(effectively this is what is used by NetworkManager when it does a
scan ... the results are then passed by NM to Sugar over DBUS.).
> Does it check one channel or all 3?
It checks all 11, depending on the regulatory domain.
> I'd expect most people to be using nearby APs with good signal
> strength so they should be easy to find and not require extra scans.
A scan can fail to detect an AP because the AP beacon is trodden on by
another transmission. Scanning is not a reliable thing; it's not like
the APs know they are being scanned and can try harder.
More information about the Devel