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Old 09-25-09, 05:51 PM   #1
kefka
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Join Date: Sep 2009
Posts: 2
Post 173.14.20 disrupts network communication

Hi there!

My system is having severe network communication problems whenever I start an application which uses the
OpenGL capabilities of of my videocard.

For the first time I recognized this, when I wanted to play Neverwinter Nights online. After trying to find out, why I hardly could connect to any gameserver in spite of having otherwise a fast and responsive Internet connection, I found out, that this problem appears whenever I start a program, which is using OpenGL (until now, I tried glxgears, quake3 and nwn).

When running ping, I easily get packet loss rates of 50% and higher, where it doesn't matter, if the pinged machine is in the LAN or not. ssh- and http-connections also get from really slow to not working anymore at all. When I stop the 3D-application, all network communication works normally again.

It's noticeable, that the cpu-load under these circumstances is always rising constantly to nearly 100%, even if let's say only the start menu of nwn is running. Reniceing the according process to a higher nice level doesn't help.

I'm running the videocard in agp mode using agpgart (nvagp doesn't work for me). Switching off agp doesn't change anything.

Has anyone heard of things like that before?
I'm thankful for every suggestion!

Greets!
kefka

Some specs:

cpu: athlon 2100 xp
ram: 1gb
videocard: GeForce FX 5700LE (with agpgart)
NIC: SiS900
OS: debian sqeeze/sid
kernel: 2.6.30.7
nvidia-driver: 173.14.20
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Old 09-25-09, 06:32 PM   #2
thefirstm
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Posts: 226
Default Re: 173.14.20 disrupts network communication

Could you post an nvidia bugreport log, or at least the output of "cat /proc/interrupts"?
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Old 09-25-09, 06:50 PM   #3
kefka
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Join Date: Sep 2009
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Default Re: 173.14.20 disrupts network communication

Sure! Should have done this right away.

cat /proc/interrupts
CPU0
0: 4635261 XT-PIC-XT timer
1: 14434 XT-PIC-XT i8042
2: 0 XT-PIC-XT cascade
5: 751039 XT-PIC-XT nvidia
7: 14 XT-PIC-XT
9: 0 XT-PIC-XT acpi
11: 154378 XT-PIC-XT ohci_hcd:usb1, ohci_hcd:usb2, ICE1712, SiS SI7012, eth0
12: 157779 XT-PIC-XT i8042
14: 54897 XT-PIC-XT ide0
15: 76 XT-PIC-XT ide1
NMI: 0 Non-maskable interrupts
LOC: 0 Local timer interrupts
SPU: 0 Spurious interrupts
ERR: 14
MIS: 0

In case you wonder while reading the bug-report-file: I tried to downgrade the driver to 173.14.12 (which didn't work).
Attached Files
File Type: gz nvidia-bug-report.log.gz (29.7 KB, 72 views)
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Old 09-25-09, 08:33 PM   #4
thefirstm
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Default Re: 173.14.20 disrupts network communication

Darn. I was hoping your GPU and network card would be using the same IRQ. That would have been a simple fix (probably.)
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