Public bug reported: Also described here: http://askubuntu.com/questions/271898/what-is-grub-doing-while-it-takes-9-minutes-to-start-booting-the-kernel and here: http://lists.gnu.org/archive/html/bug-grub/2013-03/msg00037.html
Sometime around the start of 2013 grub started to take longer and longer to boot the kernel and kernel updates started taking too long (more than 10 minutes). The 30_os-prober process was seen executing. At one point grub was taking 9 minutes to boot the kernel, which once booted just took 28 seconds to boot. The delay was actualy in grub. Later I discovered my /boot/grub/grub.cfg was 11.6 MB which is bad. A big chunk of the menu entries is generated by /etc/grub.d/30_os-prober. Line 223: ### BEGIN /etc/grub.d/30_os-prober ### ... Line 175174: ### END /etc/grub.d/30_os-prober ### grub.cfg has 175191 lines, so that script represents 99% of the 11.6 MB in the file. ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: os-prober 1.56ubuntu1 ProcVersionSignature: Ubuntu 3.5.0-26.42-generic 3.5.7.6 Uname: Linux 3.5.0-26-generic x86_64 ApportVersion: 2.6.1-0ubuntu10 Architecture: amd64 Date: Tue Apr 2 00:02:50 2013 InstallationDate: Installed on 2013-03-27 (6 days ago) InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5) MarkForUpload: True ProcEnviron: LANGUAGE=es_AR:es PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=es_AR.UTF-8 SHELL=/bin/bash SourcePackage: os-prober UpgradeStatus: No upgrade log present (probably fresh install) ** Affects: os-prober (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug quantal running-unity ** Attachment added: "Compressed 11.6 MB grub.cfg file" https://bugs.launchpad.net/bugs/1163086/+attachment/3613357/+files/grub.cfg.bz2 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1163086 Title: os-prober created a 11.6 MB grub.cfg file impossible to boot To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/os-prober/+bug/1163086/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs