Public bug reported:
This issue was discovered with Ubuntu Wily (15.10) on a currently in
development ARM64 HW.
When loading kernel via tftp in grub on this hardware, the system stops
receiving new packets (times out ) after receiving initial few tens of
tftp data packets , which then causes kernel load failure.
Running tcpdump before loading kernel in grub menu shows timeouts
occurring, as captured in the below log :
http://kernel.ubuntu.com/~ming/grub/apm.tcpdump
Following are the detailed reproduction steps :
1) setup PXE boot entry in UEFI(no any parameter to grub)
2) build one grub from upstream (and/or Wily) and put it in PXE&TFTP server
3) setup grub config, suppose the shape is like below:
menuentry 'Install for arm64' {
linux /ubuntu-installer/arm64/Image --- console=ttyS0,115200
initrd /ubuntu-installer/arm64/initrd.gz
}
4) start PXE booting in UEFI
5) grub prompt is coming
6) select 'Install for arm64' menu item and press 'enter' to start
loading kernel
7) then hangs inside loading kernel
** Affects: grub2 (Ubuntu)
Importance: Undecided
Status: New
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1508893
Title:
TFTP timeout on ARM64 hw when booting from grub that was PXE loaded
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1508893/+subscriptions
--
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
