Same here, I am running the current version of Xubuntu 15.04 on an HP Chromebook 14 Falco, and the (50s) delay disappears when using the tpm_tis.force=1 option in grub. I wonder if this has to do with loading Ubuntu from coreboot, since the setting is related to Trusted Platform management between the kernel and the Bios [1]. I am attaching some relevant dmesg output [2].
Cheers! Leo [1] http://resources.infosecinstitute.com/linux-tpm-encryption/ [2] Dmesg output: [ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-3.18.0-9-generic root=UUID=e59338a7-cc1f-4053-9a89-82ee7d3dd0db ro quiet splash tpm_tis.force=1 vt.handoff=7 [ 0.000000] DMI: Hewlett-Packard Falco, BIOS 08/13/2014 [ 0.671007] tpm_tis tpm_tis: 1.2 TPM (device-id 0xB, rev-id 16) [ 8.608433] tpm_inf_pnp 00:08: Found TPM with ID IFX0102 -- 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/1308264 Title: Ubuntu 14.04 Beta 2 stuck at "Switched to clocksource tsc" when booting up, then resumes booting to the login screen, after 1 minute Status in linux package in Ubuntu: Confirmed Bug description: On Ubuntu 14.04 Beta 2 (Final Beta), it takes remarkebly long to boot up into Ubuntu. Ubuntu gets stuck at "Switched to clocksource tsc" for a almost 1 minute or longer, then it resumes booting up to the login screen. On Ubuntu 13.10 it only takes about 7 seconds to get to the login screen, while it takes almost more than a minute to get on the login screen on Ubuntu 14.04 Beta 2. I hope this issue could be fixed. I have the Acer C720 (chromebook) that has been enabled to use legacy boot so I can use other OS's. Other Acer C720 users have been faceing the same problem also. Video of Boot https://www.youtube.com/watch?v=PVkFTsEzS80 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1308264/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp