I have some new information. This issue has something to do with processor type. I replaced nothing more but processor to Pentium Dual E2160 and suddenly x64 live cd managed to boot sucessfully. I took lspci, lshw and dmidecode of this 'upgraded' system, see attachment 'acpi-e2160.zip'.
Symmetrically, when I installed 'Intel(R) Core(TM)2 CPU 6600' into other computer (namely Optiplex 755) it stopped to boot on x64 bit version. So processor type seems to be the clue. ** Attachment added: "acpi-e2160.zip" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1243431/+attachment/3896118/+files/acpi-e2160.zip -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1243431 Title: Ubuntu 13.10 64bit installer won't boot unless acpi=off on Dell Optiplex 745 Status in “linux” package in Ubuntu: Confirmed Bug description: I am booting live cd of Ubuntu 13.10 Desktop 64bit but it ends with kernel panic because of some issues with acpi. I tried the following: - when I provide parameter acpi=off it boots ok. - when I provide acpi=ht (or no parameter) it generates kernel panic (see the screenshot in attachment). Moreover I can run 32bit version of Mint 15 with no acpi issues which suggests that only 64bit version is affected. There is attachment with two subdirectories: one contains data from Ubuntu 13.10 64 bits livecd taken with acpi=off and the second taken from 32bit version Mint 15. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1243431/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
