HaiyueLin, as per your https://launchpadlibrarian.net/146067857/BootDmesg.txt : [ 0.126413] mtrr: your CPUs had inconsistent variable MTRR settings [ 0.126414] mtrr: probably your BIOS does not setup all CPUs. ... [ 0.147453] [Firmware Bug]: ACPI: BIOS _OSI(Linux) query ignored
Hence, as per http://us.acer.com/ac/en/US/content/drivers an update is available for your BIOS (2.23). If you update to this following https://help.ubuntu.com/community/BiosUpdate , does it change anything? If it doesn't, could you please both specify what happened, and just provide the output of the following terminal command: sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date Please note your current BIOS is already in the Bug Description, so posting this on the old BIOS would not be helpful. For more on BIOS updates and linux, please see https://help.ubuntu.com/community/ReportingBugs#Bug_reporting_etiquette . Thank you for your understanding. ** Tags added: bios-outdated-2.23 ** Changed in: linux (Ubuntu) Importance: Medium => Low ** 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/1184650 Title: [Acer Aspire v3-771g] System boots into a black screen in EFI mode, but desktop loads normally in legacy mode To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1184650/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
