Re: LTS kernel Linux 4.14.290 unable to boot with edk2-ovmf (x86_64 UEFI runtime)

[Greg KH]

On Mon, Aug 22, 2022 at 09:15:59AM +0800, Qu Wenruo wrote:
> Hi,
> 
> When backporting some btrfs specific patches to all LTS kernels, I found
> v4.14.290 kernel unable to boot as a KVM guest with edk2-ovmf
> (edk2-ovmf: 202205, qemu 7.0.0, libvirt 1:8.6.0).
> 
> While all other LTS/stable branches (4.19.x, 5.4.x, 5.10.x, 5.15.x,
> 5.18.x, 5.19.x) can boot without a hipccup.
> 
> I tried the following configs, but none of them can even provide an
> early output:
> 
> - CONFIG_X86_VERBOSE_BOOTUP
> - CONFIG_EARLY_PRINTK
> - CONFIG_EARLY_PRINTK_EFI
> 
> Is this a known bug or something new?

Has this ever worked properly on this very old kernel tree?  If so, can
you use 'git bisect' to find the offending commit?

thanks,

greg k-h