[syslinux] UEFI PXE Difficulties

Ady ady-sf at hotmail.com
Fri Feb 13 09:23:01 PST 2015

> On 2015-02-13 13:45, Geert Stappers via Syslinux wrote:
> > Elaborate
> >   They start to load and the system reboots.
> I have the same issue, syslinux6.03, using syslinux.efi I have a HP G9 
> BL460c blade with EFI and a vmware virtualised guest with EFI enabled.
> I'm attempting to install rhel6.6, kernel 2.6.32. Both machines will 
> boot successfully, load kernel vmlinuz, then start to load initrd.img 
> but reset a minute or two later. rhel7 kernel 3.10.0 works better in the 
> VM and actually loads successfully and kickstarts, but the HP G9 blade 
> still resets whilst loading initrd.
> The page at http://www.syslinux.org/wiki/index.php/Common_Problems 
> states:
> Linux EFI pre-3.3
> Most kernels before Linux-3.3 have also been observed to have other 
> issues. Symptoms include spontaneous reboot at some point after kernel 
> execution begins.
> So does this mean we can't efi net boot rhel6/7 centos 6/7 or any distro 
> that uses pre 3.3 kernels?
> Thanks for any assistance.
> Michael
This issue was discussed already more than once. Instead of posting 
several links an enumerating each if the culprits (it is not just 
Syslinux, but we indeed would want Syslinux to have some solution or at 
least workarounds), I'll link to 2 prior emails that should sum up 
(more or less) the current situation in Syslinux 6.03:

_ "regression: relocatable kernels on a chromebook". The email thread 
was started in regards to booting in BIOS, but the following link is 
about both, BIOS and UEFI:

_ "syslinux 6.03 does not boot some kernels". Syslinux needs to 
implement potential "fallback" methods for (older) kernels not 
following newer standards/rules/conventions:

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