[Arm-dev] TFTP issue with PXE loaded grubaa64.efi

Jim Perrin jperrin at centos.org
Thu Jul 28 21:17:12 UTC 2016

On 07/28/2016 02:06 PM, Sakar Arora wrote:
> Hi Jim,
> Have you shared the steps to generate the grub image mentioned in the
> mailchain?

Nope. I haven't yet been able to get it to build successfully, sorry.

> Thanks,
> Sakar
> From: Jim Perrin
> Sent: Tuesday, July 12, 8:33 PM
> Subject: Re: TFTP issue with PXE loaded grubaa64.efi
> To: Sakar Arora
> Cc: Conversations around CentOS on ARM hardware, Bhupesh Sharma
> On 07/12/2016 04:38 AM, Sakar Arora wrote: > Hi Jim, > > > > While
> testing CentOS 7 installation on LS2080a RDB, *only on one of > setups*,
> we found this strange issue, where grub wasn�t able to TFTP the > boot
> images from TFTP server. We use grubaa64.efi provided on CentOS >
> website . > This is a bit of a known issue. It was reported a few months
> ago, but it has taken time for an update. While there is no official fix
> yet, we're working with pjones from rh. I'm hoping that we'll have an
> experimental update for testing in the next day or two. > > > From the
> tftp server logs we found that the tftp transaction would > always stop
> with a �timeout� error. A quick search got me this bug > logged in >
> Ubuntu bug tracking system. There was a mention of a patch, which is >
> supposed to fix this issue. > > grub2 is already very heavily patched. >
>> So, I went ahead and created a grub image with the latest upstream
> grub > source code (git.savannah.gnu.org/grub.git). > > > > Using this
> grub image, fixed the issue with TFTP transfers. > > > > But, there�s
> different kind of issue with this new grub image. It > doesn�t seem to
> be fully compatible with UEFI PXE boot protocol. When > loading grub via
> UEFI PXE boot, the tftp server address does not get set > in the grub
> environment variables, as was the case with grubaa64.efi > from CentOS
> that we use. > Yup. There are quite a few patches in the grub2 we
> use/ship. > > > Can you share you views on this? Give me a day or so to
> rebuild the test package pjones has. It will be in the experimental
> repository as it's not a 'released' fix. Once it's built and available,
> I'll post directions to the list for how to test it. -- Jim Perrin The
> CentOS Project | http://www.centos.org twitter: @BitIntegrity | GPG Key:
> FA09AD77

Jim Perrin
The CentOS Project | http://www.centos.org
twitter: @BitIntegrity | GPG Key: FA09AD77

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