Wireless Slows down computer to a halt
Hi all, I had my wireless (bcm4311) working flawlessly last month. But i ended up having to reinstall a fresh copy of kubuntu couple of weeks ago (my ext2 partition got accidently deleted). But now i am trying to get my wireless to work again. And everytime i connect with the wireless. My computer will start slowing to the point of it basically just freezeing. And i have no idea where to being. running tp in the console doesn't show anything out of the ordinary, no memory hogs. I have tried the wireless assistant manager, and just running wpa_supplicant and both slows my computer down. So any ideas?
The first thing I would do is kill IPv6 and try again. It causes long waits timing out.
This is just a SWAG, but I had a similar problem (with Mandriva) after replacing/upgrading my motherboard - Everything involved with my wireless was very slow. If you're using ndiswrapper as a driver, and especially if you moved your wireless pci card around (sorry, I can't tell from the information you provided if either is the case), this may be your problem.
I had introduced an IRQ conflict; ndiswrapper in particular does not play well with some other devices, like the monitor, when they share the same IRQ, and the problem doesn't show up as either a memory problem or as a process hogging cpu. It was solved (almost painlessly) by moving my pci card for the wireless to a different slot.
Hi there, I think I'm having much the same problem as the original poster. I run Ubuntu (feisty, fairly up-to-date) and Windows XP on a Celeron. Under Win it runs OK, but under Linux the computer gets horribly slow when I plug the wireless adapter in and it halts when I plug it out. This is a link to a page here which describes the USB adapter I'm using:
I couldn't even try to kill the IPv6 process as the first reply suggested, since the computer was effectively down. The second reply, as far as I understand it, suggests that the problem might be this: both the USB and the monitor are connected through the same way into the motherboard, which causes a conflict, so I'd have to separate that. Well, judging from the way I can plug things on the back of the box, both the video and the USB controllers are inbuilt on the motherboard, so I don't know if I'd be able to do the job. I'd like ideas on that, please.
English isn't my mother language and I quite lack technical terms, so if anyone who'd answer could kindly use simple language and describe the objects and parts, instead of just naming them, that'd be very appreciated.
Thanks a lot,
PS: since I'd rely on that adapter to use Internet on that machine, it'd be a little complicated for me to post outputs from lspci or stuff like that here. If it's absolutely necessary, then I'd do it.
If you suspect an irq conflict... I would suggest adding "acpi=noirq" on the kernel line in menu.lst
<off your blank look> OK, I'll show you:
sudo cp /boot/grub/menu.lst /boot/grub/menu.lst.original
(You will be editing a system file.. so we back it up.)
sudo gedit /boot/grub/menu.lst
(This file handles boot settings for each OS you have installed. It has a lot of comments in it which describe what each bit does.
Look through this file for your normal Ubuntu boot. It will be something like this:
kernel /boot/vmlinuz-2.6.20-16-generic root=UUID=2a6975b6-eb02-4b6a-b215-593f0ce276ca ro quiet splash acpi=noirq
(yeah, that's all one line!)
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