Bug 6351 - Timing of Netboot is different if UEFI does not pass through UEFI Shell
Summary: Timing of Netboot is different if UEFI does not pass through UEFI Shell
Status: RESOLVED WONTFIX
Alias: None
Product: MinnowBoard MAX Firmware
Classification: Hardware Platforms
Component: minnowboard-uefi-firmware (show other bugs)
Version: unspecified
Hardware: MinnowBoard x86
: Low minor
Target Milestone: Production Release
Assignee: chao zhang
QA Contact:
URL:
Whiteboard:
Depends on:
Blocks:
 
Reported: 2014-05-20 14:03 UTC by Bill Mills
Modified: 2015-01-26 22:28 UTC (History)
2 users (show)

See Also:
OS type for building Yocto: ---
Type of Regression: ---
Verified:
Documentation change: Don't know

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Description Bill Mills 2014-05-20 14:03:32 UTC 
I am running Firmware version 1.0

If I change the boot order to immediatly boot to IPv4, the timing is quite a bit different than if I pass through the UEFI SHell.

                              Shell      Direct
Initial delay                 0 S        12 S 
Discover to Request delay     2 S        15 S

UEFI Shell is boot option 0:
Boot, esc, "exit", esc, "exit", choose IPv4 from boot menu
"Start PXE over IPv4" comes out on HDMI and serial port
Immediatly sends DHCP Discover packet and gets DHCP Offer
waits *2* seconds
Sends DHCP Request and process completes

For Direct boot:
"Start PXE over IPv4" comes out on HDMI and serial port
waits *12* seconds
Sends DHCP Discover packet and gets DHCP Offer
waits *15* seconds
Sends DHCP Request and process completes

This makes me wonder if the timers are running on different rates in the two boot paths or similar init condition differences.
Comment 1 John 'Warthog9' Hawley 2015-01-26 22:28:16 UTC 
MinnowBoard v1 has reached new feature EOL, FW development is done as are new hardware features.  If you feel EXCEEDINGLY strongly about an issue please re-open it for discussion but be aware that we are recommending individuals migrate to the MAX platform.