[Bug 354816] Re: system freeze when browsing internet with linux-rt

[Benoit St-André]

Just installed Jaunty AMD64 yesterday from daily ISO build, and
experienced something that looks like this bug systematically.

My machine is a AMD64 X2 , with an nvidia card (GeForce 6150 LE,
onboard). I'm using the nvidia driver, version 180 (everything coming
from ubuntu repositories without fiddling with anything).

Just to be clear about what happens (and others should clarify this)

- this happens using an smp machine, with rt kernel. The scenario is something seems to get "filled" up when using anything over the network, even just getting mounted through ssh from a remote host, and the machine completely freezes after a couple of minutes.
- the machine never crashes with -generic kernel
- the machine never crashes with rt kernel, provided it is booted with nosmp option.

I did try to see if "forcedeth" module was the problem, but it was not.
I deactivated my onboard card in the BIOS, and added a Realtek PCI
network card. The machine still froze when using the network after a
couple of minutes. I could not find any forcedeth module loaded.

Other thing that could be relevant, I can see that my second CPU is used
at 100% (that's what htop says). That seems to corroborate what Toine
has experienced.

Willing to test whatever other kernel package or modifications needed.


** Attachment added: "lspci -v"
   http://launchpadlibrarian.net/25356724/lspci.txt

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system freeze when using network with linux-rt on smp amd64 machines
https://bugs.launchpad.net/bugs/354816
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