Tested with 3.9.0 repo kernel. Lockup still occurs on 9 of 10 boot attempts.
Additionaly the system locks up when lcd screen brightness is modified. This happens in 3.8 and 3.9 kernels unless "nox2apic" grub boot option is provided. apt-cache show linux-headers-3.9.0-030900 Package: linux-headers-3.9.0-030900 Source: linux Version: 3.9.0-030900.201304291257 Architecture: all Maintainer: Ubuntu Kernel Team <kernel-t...@lists.ubuntu.com> Installed-Size: 59634 Depends: coreutils | fileutils (>= 4.0) Filename: ./linux-headers-3.9.0-030900_3.9.0-030900.201304291257_all.deb Size: 12443034 MD5sum: 161df2b7ea57e2bdfa64b76734e675f0 SHA1: e18020c7f66fc2c2354c48bd1616d0d72d43ea6a SHA256: a7193a604900c3e19087ffbfceebd8c6d4c0c53230e131260c994f2757f4ce28 Section: devel Priority: optional Description: Header files related to Linux kernel version 3.9.0 This package provides kernel header files for version 3.9.0, for sites that want the latest kernel headers. Please read /usr/share/doc/linux-headers-3.9.0-030900/debian.README.gz for details -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1180751 Title: Lenovo T420s boot problem To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1180751/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
