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Subject: Re: linux-tpmdd self signed kernel failing to boot with secreboot on
To:     Matthew Garrett <mjg59@google.com>
Cc:     linux-integrity <linux-integrity@vger.kernel.org>,
        Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
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From:   Jordan Hand <jorhand@linux.microsoft.com>
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Date:   Tue, 30 Apr 2019 16:00:40 -0700
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On 4/30/19 3:43 PM, Matthew Garrett wrote:
> On Tue, Apr 30, 2019 at 9:28 AM Jordan Hand <jorhand@linux.microsoft.com> wrote:
> 
>> 1st Gen (SKU Number from dmidecode is LENOVO_MT_3448)
> 
> Ok, unfortunately not able to grab one of those. If you boot with
> earlyprintk=efi on the kernel command line, do you get any output
> around the hang?
> 
No. The only print messages I get are from efi_printk. And they don't 
show up like normal kernel logs do during boot. The purple grub screen 
hangs and the efi_printk messages just print over the top of it.

Although now I'm wondering if the efi_printk messages I added after 
efi_exit_boot_services just aren't showing up because I've exited boot 
services and can no longer call that function (seems reasonable).