efi_printk

efi_printk

[Jason Taylor]

I'm not having luck finding the efi_printk output for compressed/eboot.c. I have tried adding "earlyprintk=efi,keep" to the boot params. Is there something special that I need to do to enable it? I didn't see a config option that seemed to enable/disable it. From some bug reports, it looks like these messages should possibly just be showing up in dmesg? I'm running as a guest on Hyper-V in case that makes a difference.

Thanks,
Jason
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Re: efi_printk

[Kinsella, Ray]

Have you set CONFIG_EARLY_PRINTK_EFI ?

Ray K

On Thu, 2016-04-14 at 19:25 +0000, Jason Taylor wrote:
> I'm not having luck finding the efi_printk output for
> compressed/eboot.c. I have tried adding "earlyprintk=efi,keep" to the
> boot params. Is there something special that I need to do to enable
> it? I didn't see a config option that seemed to enable/disable it.
> From some bug reports, it looks like these messages should possibly
> just be showing up in dmesg? I'm running as a guest on Hyper-V in
> case that makes a difference.
> 
> Thanks,
> Jason
> ---------------------------------------------------------------------
> ------------------
> PRIVACY STATEMENT:
> This message is a PRIVATE communication.  This message and all
> attachments are a private communication sent by SimpliVity and are
> considered to be confidential or protected by privilege. If you are
> not the intended recipient, you are hereby notified that any
> disclosure, copying, distribution or use of the information contained
> in or attached to this message is strictly prohibited.  Please notify
> the sender of the delivery error by replying to this message, and
> then delete it from your system.
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Re: efi_printk

[Jason Taylor]

On 4/15/2016 6:08 AM, Kinsella, Ray wrote:
>
> Have you set CONFIG_EARLY_PRINTK_EFI ?

Yes, I enabled that build option.

Re: efi_printk

[Kinsella, Ray]

Should work then, once you set earlyprintk=efi. 

As I remember from reading the efi printk code, their is an assumption
that UEFI supports framebuffer. In my case my board was headless, so
earlyprintk=efi did not work for me.  

Given your virtualized environment, it is not outside possibility that
their is no framebuffer support in the VM's UEFI? 

Thanks,

Ray K 

On Fri, 2016-04-15 at 10:24 -0400, Jason Taylor wrote:
> On 4/15/2016 6:08 AM, Kinsella, Ray wrote:
> > 
> > Have you set CONFIG_EARLY_PRINTK_EFI ?
> 
> Yes, I enabled that build option.
> 
> 
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