Comment 3 for bug 698099

An update on this bug.

I had to reboot my machine this morning due to an electrical outage overnight. I selected the previous kernel (linux-image-2.6.35-23-generic) rather than the default latest kernel (linux-image-2.6.35-24-generic), as I still require all four serial ports and I believed that they would all work under 2.6.35-23-generic.

However, the problem reported above has now also occurred under this same, older kernel.

Therefore, I conclude that this bug is not a regression after all, but is in fact caused by some other factor which appears to be unrelated to the kernel version. I am going to reboot into 2.6.35-24-generic to see if the problem goes away, and to see if any pattern can be established.

Any help with debugging this would be most appreciated.