Support for ipv6 keeps being put into the kernel and now into browsers.
I blacklisted ipv6 in Slackware and that solved the slow internet response until I updated to the latest Opera and Firefox browsers. Both were horribly slow again. Firefox could be reconfigured to kill ipv6 by running about:config as a url and disabling ipv6.

The new Opera 11 is different. I can't find any config to disable ipv6. Does anyone have an idea?

I reverted to Opera 10.11 in order to have zippy internet access again, and not "dialup modem" speeds.

Then reboot.

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Thanks. I'll give it a try tonight. There seems to be a lot of slow internet complaints in the Opera forum.

I thought I had solved the problem during the past Opera upgrades with this:

adding "blacklist ipv6" to /etc/modprobe.d/blacklist.conf

Actually, I haven't checked the blacklist.conf file recently and perhaps the slackpkg updates may have changed it.
I'm running 64 bit current.

Thanks again. I'll respond later on how it went.

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Problem solved. Evidently, slackpkg upgrades changed the blacklist.conf file, so a separate ipv6.conf file is needed to prevent this from happening in the future.

Thanks again.

Well, in the interest of fairness to slackpkg, it didn't change it unless you told it do so. It doesn't automatically overwrite
config files - it asks what you want to do.

That being said, this sort of thing is *exactly* why I prefer to leave system-provided files alone if at all possible. Instead of editing /etc/profile, I add custom scripts in /etc/profile.d/ ; instead of editing the modprobe files, I make custom files (with sensible names). These things make it easier to upgrade - I don't have to diff the files, because I know I didn't edit them, so I can just overwrite blindly.

As an alternative to any Opera user who might read this. Recent snapshots (public development builds) should fix the problem. You will need one with a version number of at least 11.01-1164.

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