Linux - NetworkingThis forum is for any issue related to networks or networking.
Routing, network cards, OSI, etc. Anything is fair game.
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I just installed SuSE 9.1 yesterday (as a stand alone system). I used it for a while and I did notice that web page downloads were discernably slower than I was used to on my Windows NT installation. (I have a cable connection (through a hardware router), so I'm used to virtually instantaneous downloads).
The more interesting thing is - when I rebooted into NT and started up a browser, I found that download speeds were distinctly slower even there. This happens with any browser - Opera, Mozilla, IE. It is also the case with Outlook Express. Moreover the download is not as smooth as it used to be - a lot more jerky. It also seems to affect mouse movement when downloading - it is almost as if the mouse is getting a very low priority - with all the processor cycles being taken up by the data transfer. If I try to move the mouse while any transfer is taking place, the movement is very jumpy - a very unnerving effect.
Since this started happening soon after the Linux install, I can only conclude that it was caused by it. Could it have anything to do with some BIOS setting (or maybe a setting on the router?) - changed by the Linux Kernel during installation - because those are the only two connections I can think of between the two OS's.
Turned out that it was the ACPI (Advanced Configuration and Power Interface - which presumably had been enabled during installation) that was causing the problem. For whatever reason, when ACPI is enabled, some IRQ's need to be re-routed via PCI bus (not that I really understand what that means - that was what was recorded in the Linux Startup Log. I assume NT needed to do the same). I think that was causing the mouse, keyboard, network card and video card to compete for resources which was causing the behaviour I described in NT.
Turning off ACPI in the BIOS solved the problem. Now I need to find a way to get Linux to turn it on when booting up and turn it off while shutting down. Any way to accomplish this? Thanks.
In my case I found that when using kernel 2.4, I had the Network Configuration set to Automatically obtain DNS information from provider and that was all that was required.
However I found with kernel 2.6 it is not quite that simple, I had to input the following info into the Network Configuration , as obtained from my ISP:
Primary DNS Secondary DNS Tertiary DNS
After doing the above, I had speed again
I am using Fedora Core 2
Ensure that Automatically obtain DNS information from provider is not selected
To do this go to
> System Settings
> Network
> select Device
> Edit
> General tab
Hope this helps
Last edited by Cybersurfer; 11-13-2004 at 05:14 PM.
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