Grzegorz G., thank you for reporting this and helping make Ubuntu better. With your WORKAROUND in place, could you please execute the following command, as it will automatically gather debugging information, in a terminal: apport-collect 1007508
** Description changed: - On my new PC something is wrong with ACPI support under Linux. I have to - boot it with acpi=off and nolapic, without any of those two system won't - boot. (As a side effect it detects only one CPU core and won't shut down - completely, I have to hold power button for few seconds to power PC - off.) + On my new PC something is wrong with ACPI support under Linux. + + WORKAROUND: I have to boot it with acpi=off and nolapic, without any of + those two system won't boot. (As a side effect it detects only one CPU + core and won't shut down completely, I have to hold power button for few + seconds to power PC off.) My configuration: - Ubuntu 12.04 (upgraded from 11.10) - Processor AMD FX(tm)-4100 Quad-Core - RAM 8,00 GB - Graphic Gigabyte GV-N56GOC-1GI (NVIDIA GeForce GTX 560) - Mainboard Gigabyte GA-870A-USB3 - Disk ATA OCZ-AGILITY3 (SSD) + Ubuntu 12.04 (upgraded from 11.10) + Processor AMD FX(tm)-4100 Quad-Core + RAM 8,00 GB + Graphic Gigabyte GV-N56GOC-1GI (NVIDIA GeForce GTX 560) + Mainboard Gigabyte GA-870A-USB3 + Disk ATA OCZ-AGILITY3 (SSD) According to https://wiki.ubuntu.com/DebuggingACPI I tried booting it with acpi=ht (also with acpi=ht AND nolapic), but not to avail. Quote: 'If acpi=off works and acpi=ht fails, then the issue is in the ACPI table parsing code itself, or perhaps the SMP code. ' I will also attach files mentioned on the DebuggingACPI wiki page. ** Tags added: needs-kernel-logs ** Tags added: kernel-bug-exists-upstream-v3.5-rc1-quantal ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1007508 Title: ACPI bug in Precise (generic kernel 3.2.0.24.26) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1007508/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
