[lkml]   [2018]   [Dec]   [31]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: tpm_tis TPM2.0 not detected on cold boot
    On Sun, 2018-12-30 at 14:22 +0100, Michael Niewöhner wrote:

    > > difference is that on a cold boot, the TPM takes longer to initialize.
    > Well, as I said. Waiting for 10, 20 or even 60 seconds in the boot manager does
    > not solve the problem. So the problem is NOT that the TPM takes longer to
    > initialize. Even adding a delay of 20 seconds before TPM init does not solve
    > that while that should be more than enough time.

    The purpose of commenting out the TPM2 selftest was to minimize the
    TPM initialization delay, so that the TPM is ready before IMA.  After
    James' patch that wasn't needed anymore.

    Looking back at this thread, I see you're using systemd-boot, not
    grub2.  When you commented out the systemd-boot timeout, IMA found the
    TPM.  The question is why isn't the TPM ready with the timeout before
    IMA (like above)?  Has systemd-boot done the selftest?


     \ /
      Last update: 2018-12-31 22:18    [W:11.548 / U:0.008 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site