[Bug 1954716] Re: rpi nfsroot vers=4 not supported anymore?

[Stephen Winnall]

Good point: since this is the first bug I have ever actively pursued,
this is one of possibly many avenues I should follow.

> On 9 Aug 2022, at 19:30, Thorsten Glaser <1954716 at bugs.launchpad.net> wrote:
> 
> Have you considered informing klibc upstream? (Granted, save for hpa
> that’s basically the Debian maintainers, but they don’t necessarily get
> Launchpad bugreports either.)
> 
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> https://bugs.launchpad.net/bugs/1954716
> 
> Title:
>  rpi nfsroot vers=4 not supported anymore?
> 
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https://bugs.launchpad.net/bugs/1954716

Title:
  rpi nfsroot vers=4 not supported anymore?

Status in klibc package in Ubuntu:
  Confirmed
Status in linux-raspi package in Ubuntu:
  Invalid

Bug description:
  I'm running `5.13.0-1011-raspi #13-Ubuntu SMP PREEMPT Fri Nov 19
  18:40:23 UTC 2021 aarch64 aarch64 aarch64 GNU/Linux` and have
  successfully set up netbooting on my RPi 4B (4GB). When I do not
  specify a `vers=` in cmdline.txt, NFS version 3 is used. I'd like to
  move to version 4, but unlike the setup described in
  https://forums.raspberrypi.com/viewtopic.php?p=1751741#p1751741, I
  cannot get `vers=4` (or any sub-version to work): the console logs
  `invalid value for vers.` for whatever I try.

  Current working cmdline.txt:
  ```
  dwc_otg.lpm_enable=0 console=serial0,115200 console=tty1 root=/dev/nfs nfsroot=192.168.3.101:/srv/pinet/root,tcp ro ip=dhcp rootwait fixrtc splash
  ```

  Nonworking cmdline.txt:
  ```
  dwc_otg.lpm_enable=0 console=serial0,115200 console=tty1 root=/dev/nfs nfsroot=192.168.3.101:/srv/pinet/root,tcp,vers=4 ro ip=dhcp rootwait fixrtc splash
  ```

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