USN-661-1: Linux kernel regression

Releases

• Ubuntu 8.10

Packages

• linux -
• procps -

Details

Version 2.6.27 of the Linux kernel changed the order of options in
TCP headers. While this change was RFC-compliant, it was found that
some old routers and consumer DSL modems would not route traffic for
these systems when TCP timestamps were enabled. As a workaround, TCP
timestamps were disabled via sysctl.

This update restores the previous ordering of TCP options, and
reenables TCP timestamps. We apologize for the inconvenience.

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 8.10

• linux-image-2.6.27-7-virtual - 2.6.27-7.15
• linux-image-2.6.27-7-generic - 2.6.27-7.15
• linux-image-2.6.27-7-server - 2.6.27-7.15
• procps - 1:3.2.7-9ubuntu2.1

After a standard system upgrade you need to reboot your computer to
effect the necessary changes.

References

• https://launchpad.net/bugs/264019