<div dir="auto">Yup, setting bios to use traditional booting methods ( turn off "secure boot" and UEFI ) make installing anything that's not Microsoft a lot easier.<div dir="auto"><br></div><div dir="auto"><br></div></div><br><div class="gmail_quote"><div dir="ltr">On Tue, Sep 4, 2018, 4:15 PM Rick Moen <<a href="mailto:rick@linuxmafia.com">rick@linuxmafia.com</a> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Quoting Elise Scher (<a href="mailto:elise.scher01@gmail.com" target="_blank" rel="noreferrer">elise.scher01@gmail.com</a>):<br>
<br>
> So I just hit ctrl alt delete again to try to restart. Got the following<br>
> output on screen:<br>
> <br>
> [ 2.310960] PKCS#7 signature not signed with a trusted key<br>
> [ 2.311363] PKCS#7 signature not signed with a trusted key<br>
> Similar erreo msgs for 13 more lines, with only the decimal number<br>
> changing. Values are below for decimal numbers:<br>
> 2,313892<br>
> 2.315027<br>
> 2.327113<br>
> 2.339880<br>
> 2.340271<br>
> 2.358375<br>
> 2.359458<br>
> 2.361559<br>
> 2.362181<br>
> 2.369255<br>
> 2.380620<br>
> 3.072994<br>
> 3.115769<br>
<br>
> Gave up waiting for root device. Common problems:<br>
> -Boot args: (cat /proc/cmdline)<br>
> - Check rootdelay= did the system wait long enough?)<br>
> - Check root= (did the system wait for the right device?)<br>
> <br>
> And there is more output too. In next email.<br>
<br>
Thank you for taking the trouble to type all that in, which I'm sure<br>
took a lot of time and trouble.<br>
<br>
A bit of searching suggests <br>
(<a href="https://unix.stackexchange.com/questions/455189/pkcs7-signature-not-signed-with-a-trusted-key" rel="noreferrer noreferrer" target="_blank">https://unix.stackexchange.com/questions/455189/pkcs7-signature-not-signed-with-a-trusted-key</a>)<br>
that this is a common problem with the Ubuntu Linux 18.04 release put<br>
out this past April, and involves the booting kernel attempting to load<br>
kernel modules that haven't been signed as part of UEFI Secure Boot,<br>
with the result of the modules not loading. As one of those modules <br>
was necessary for reading mass storage, the end-result was that the<br>
kernel as unable to mount the root filesystem.<br>
<br>
The best remedy would be to disable Secure Boot in the unit's BIOS Setup<br>
program. This would be my strong recommendation -- assuming your <br>
computer's BIOS Setup gives you that capabiity. The alternative would<br>
be to cryptographically sign the modules, which of course would be<br>
damned difficult with your machine not booting.<br>
<br>
More on that:<br>
<a href="https://askubuntu.com/questions/773734/how-to-install-module-ko-module-without-kernel-signature-or-kernel-rebuild-in-ub" rel="noreferrer noreferrer" target="_blank">https://askubuntu.com/questions/773734/how-to-install-module-ko-module-without-kernel-signature-or-kernel-rebuild-in-ub</a><br>
<a href="https://blog.ubuntu.com/2017/08/11/how-to-sign-things-for-secure-boot" rel="noreferrer noreferrer" target="_blank">https://blog.ubuntu.com/2017/08/11/how-to-sign-things-for-secure-boot</a><br>
<br>
<br>
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</blockquote></div>