Display Occasionally Hangs with WIFI

[Slide]

What wireless card do you have? I had some issues with the ipw2200
with hanging, but once I disabled HW crypto it worked better, I won't
remember exactly how to disable it right now, but there were lots of
examples on the web about it.

slide

On 10/10/06, Mark Phillips <mark at phillipsmarketing.biz> wrote:
> A quick follow up:
>
> I have also noticed some variability in the signal strength of the wireless
> network. It moves around from between 33% and 20% signal strength. I am not
> sure what the effect is of changing network speeds on the hardware or the
> software. This observation also seems to correlate with the variability in
> ping response time over the wireless network:
>
> ping to access point over wired network (100baseT):
> rtt min/avg/max/mdev = 0.704/0.785/1.093/0.105 ms
>
> ping to Pentium PC over wired network
> (100baseT to access point, wireless-g network to Pentium PC)
> rtt min/avg/max/mdev = 1.126/2.092/49.162/5.396 ms
>
> Beyond running a wire to the Pentium PC, any suggestions on what I can do to
> stop the display, and occasionally, the computer, from hanging? Or, how to
> further isolate the problem?
>
> Thanks!
>
> Mark
>
> On Monday 09 October 2006 06:05 pm, Dazed_75 wrote:
> > No idea whether it relates to your problem or not, but I find my wifi signal
> > strength seems to vary a lot for at least some clients.  My TiVo unit (20-25
> > feet from the Linksys WRT54g) connects using a Netgear WG111 802.11g usb
> > adapter and the Tivo reports signal strength varying widely over time.  When
> > the strength shows low, transfer rates seem to go to hell probably due to
> > errors.  OTOH, my Toshoba laptop with built-in wifi shows slightly varying,
> > but consistently high, signal strength even form the other end of the house
> > which is through two walls.
> >
> > Point is the variance in signal strength can also be the receiver and can
> > definitely cause bad slowdowns or lags.
> >
> > On 10/9/06, Mark Phillips <mark at phillipsmarketing.biz> wrote:
> > >
> > > I have ndiswrapper 1.16 installed on an old Pentium laptop running Debian
> > > sarge (2.6.8-2-386). The wireless card is a DLink DWL-G630 using the
> > > mrv8ka51
> > > driver. My access point is a Linksys WRT54G.
> > >
> > > The pentium box is setup as a remote X-terminal over ssh - i.e. a minimal
> > > installation of Debian and X. It makes a great remote terminal for my kids
> > > for homework. (see Sterminal - a nifty script -
> > > http://www.ma.utexas.edu/users/stirling/computergeek/xterminal.html)
> > >
> > > Most of the time this setup works just fine. However, occasionally, the
> > > display hangs and doesn't come back for a couple of minutes, or never. The
> > > computer is not dead - I can usually ssh from another computer. However,
> > > the
> > > X-terminal session is frozen.
> > >
> > > I have also noticed that if I run a ping from this computer over my local
> > > network, I get on average a 1 ms response. But occasionally, the time
> > > jumps
> > > to 30 or 50 ms.
> > >
> > > How can I go about finding the cause of this in-frequent hanging? I don't
> > > know
> > > if it is a ndiswrapper issue, card issue, slow Pentium issue, driver
> > > issue,
> > > access point issue, phase of the moon, etc.
> > >
> > > I thought about upgrading to the latest ndiswrapper, but it has to be
> > > compiled
> > > with gcc >3.4 and my kernel was compiled with gcc3.3. I tried recompiling
> > > my
> > > kernel with gcc3.4, but it failed to boot up. Probably a configuration
> > > issue,
> > > even though I used the config file that came with my Debian kernel
> > > 2.6.8-2-386. Instead of fixing this problem only to find that the screen
> > > hanging is not an ndiswrapper problem, I thought I would go back to the
> > > actual problem I want to solve and see if there is another way to
> > > troubleshoot it.
> > >
> > > Thanks!
> > > --
> > > Mark Phillips
> > > Phillips Marketing, Inc
> > > mark at phillipsmarketing.biz
> > > 602 524-0376
> > > 480 945-9197 fax
> > > ---------------------------------------------------
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> > >
> >
> >
> >
> > --
> > Be who you are and say what you feel, because those who mind don't matter
> > and those who matter don't mind.  - Dr. Seuss
> >
>
> --
> Mark Phillips
> Phillips Marketing, Inc
> mark at phillipsmarketing.biz
> 602 524-0376
> 480 945-9197 fax
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