1. Reboot the machine 2. Press ESC upon GRUB menu appeared 3. Press "e" to enter edit mode of GRUB command launching kernel 4. find line with kernel options - it should contain one or more words "quiet", "splash", "image" 6. fix cursor at the and of the line and enter "pci=routeirq" (w/o quotes) 7. press F10 to make GRUB go on.
If things will go well - add the option to GRUB_CMDLINE_LINUX as described in my previous post If thing will not go well, repeat the above procedure, but this time enter the option "pci=nocrs" ( the newer motherboard/BIOS you have the more likely you will require it). Good luck! -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1087519 Title: Serial port ttyS4 doesn't work in 12.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1087519/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
