[Dextrose] WiFi vs Suspend
pgf at laptop.org
Wed Aug 25 09:38:05 EDT 2010
tony -- thanks for this. if you could, please open a trac ticket (bug
report) at http://dev.laptop.org to describe this issue. the next
time it occurs, in order to more simply gather most of the information
bernie asked for, plus a little more that may be useful, please run
the command "olpc-log" from a Terminal window. this will create a
file called "logs.<serial_no>.<timestamp>.tar.bz2" in your current
directory. please attach that file to the trac ticket. in fact,
please run the command twice -- once during the "locked up" period,
and again after, and attach both files. possibly overkill, but might
(the "olpc-log" command takes an fairly long time to run, but it collects
lots of information.)
forster at ozonline.com.au wrote:
> Sorry, on closer inspection its not locked up, it just looks like its locked up
> because it is doing something else for a long time.
> Can be replicated 100%. Shut the lid for a while, 5 minutes is not long enough
> 1.5 hours is. Resume from sleep. The Wifi shows it is connected at 100% signal
> (signal is not 100%). There is no internet access. There is no response to
> Disconnect. Previously I had given up and restarted but if you wait 3 minutes
> or so it disconnects and then works normally.
> > [cc += olpc-devel]
> > El Wed, 25-08-2010 a las 11:05 +1000, forster at ozonline.com.au escribiÃ³:
> > > OS373pyg
> > > Wifi is locked up after resume from sleep, must restart.
> > > I presume this bug is being tracked at dev.laptop.org/ in one of the 4
> tickets below
> > > http://dev.laptop.org/ticket/10232 WiFi dies on suspended XO-1,os300
> > > http://dev.laptop.org/ticket/10092 Networking broken over suspend/resume
> on os13 for XO-1
> > > http://dev.laptop.org/ticket/9960 wake-on-WLAN doesn't always work\
> > > http://dev.laptop.org/ticket/9967 ibertas suspend fails on XO-1 (fixed)
> > There are a number of unsolved bugs in the libertas kernel driver or in
> > its fantastically proprietary firmare. If you turned on automatic power
> > management on an XO-1, you might be seeing this other one:
> > http://dev.laptop.org/ticket/10195
> > In short, very rarely the libertas usb8xxx disappears from the USB bus
> > when it receives certain commands from the driver. Suspend/resume are
> > known to trigger quite frequently and the mesh also seems to cause it
> > once or twice per day in a classroom of 30 students.
> > Because time for debugging was running out, in the latest beta builds I
> > had to disable both mesh support and automatic power management in the
> > attempt to get rid of this bug. After one week of testing, the problem
> > was not reported any more.
> > If you spot this bug again, could you please:
> > * check whether eth0 is still visible with "ifconfig -a"
> > * check whether the Marvell 8xxx is still visible with "lsusb"
> > * "dmesg >dmesg.out" and attach it to the bug. Dextrose enables
> > libertas debug in /etc/rc.local to help diagnose this bug.
> > This never ending saga brings me back to an exasperated email that David
> > Woodhouse wrote about 3 years ago, after spending many days in
> > unfruitful debugging, in which he warned that access to the source code
> > of the firmware was essential in order to nail down all the obscure
> > Libertas bugs.
> > --
> > // Bernie Innocenti - http://codewiz.org/
> > \X/ Sugar Labs - http://sugarlabs.org/
> > _____________________________________________________
> > This mail has been virus scanned by Australia On Line
> > see http://www.australiaonline.net.au/mailscanning
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