Bug 194793

Summary:	EFI boot loader panic: vm_fault: fault no nofault entry, addr: fffffe0000eb8000 (10.1-rc4) efi boot only
Product:	Base System	Reporter:	North <nccs>
Component:	kern	Assignee:	freebsd-bugs (Nobody) <bugs>
Status:	Closed FIXED
Severity:	Affects Only Me
Priority:	---
Version:	10.1-RC4
Hardware:	amd64
OS:	Any

Description North 2014-11-03 21:56:44 UTC

I have a asus g750jx i7-4700hq 16GB mem 1tb HD  gtx770 video
When I boot from EFI (only) I get the following Panic!!!!

panic: vm_fault: fault no nofault entry,  addr:   fffffe0000eb8000
cpuid=0
KDB stack backtrace:
#0  0xffffffff806db2f0 at +0x149900
#1  0xffffffff806a0415 at +0x10ea25
#2  0xffffffff809138be at +0x381ece
#3  0xffffffff80911d07 at +0x380317
#4  0xffffffff8095785c at +0x3c5e6c
#5  0xffffffff8095702a at +0x3c563a
#6  0xffffffff8093cf12 at +0x3ab522
#7  0xffffffff802b298c at ??+0


yet if I boot from my usb install release(10)
(esc)
and set currdev to disk1p10
unload
load kernel
boot 


And alls fine the system boots

The system boot fine from EFI before I updated to RC4
from 10.1 prerelease

make buildworld
make buildkernel
make installworld
make installkernel
all went well not problems

Comment 1 North 2015-01-20 22:57:50 UTC

update:

ONLY!! boots a custom slim down 10.1 prerelease kernel (unused network devices removed) 

Used of  GENERIC kernel of 10.1 rc4, 10.1 prerelease, 10.1-release fail with panic reboot.  

Downloaded new FreeBSD-10.1-RELEASE-amd64-uefi-memstick.img usb install image.

Boot from USB image fails with panic reboot (see below)


>> FreeBSD EFI boot block
   Loader path" /boot/loader.efi
Consoles: EFI console
Image base: 0x4b92900
EFI version: 2.31
EFI Firmare American Megatrends (rev 4.654)

FreeBSD/and64 EFI Loader, Revision 1.1
(root@releng1.nyi.freebsd.org, Tue Nov 11 20:57:24 UTC 2014)
Loading /boot/defaults/loader.conf
/boot/kernel/kernel text=0xf8f898 data=0x124a30+0x2055c0 syms=[0x8+0x1405e0+0x8+0x15b077]

Hit [Enter] to boot immediately, or any other key for command prompt.
Booting [/boot/kernel/kernel]...
Start @ 0xffff??????????
(painic reboot)


YET!! boot from MBR on same USB seems to work fine!!

Noted Differences between UEFI and MBR bootloaders


Consoles :internal video/keyboard  (not EFI console)

/boot/kernel/kernel  text, data amd syms are the same.

may be related to Bug 193646
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=193646

Comment 2 North 2015-01-31 18:02:41 UTC

Update:

WORKS!!!!!!

Problem seemed to be caused by the BIOS 
Update Bios from ver 208 to 209 and poof the labtop boots
now work from HD & USD release 10 or 10.1.

no more hangs or panics

problem CLOSED!!!!!!!

Comment 3 North 2015-01-31 18:10:52 UTC

p.s.
bios update description below from (asus.com)

BIOS 209 (G750JX)
Fix WHQL issue for win 8.1

Notice：Please check in the BIOS setup for the correct BIOS file name of your Notebook PC. Please refer to FAQ: 
BIOS Name of Notebook PC
http://support.asus.com.cn/faq/detail.aspx?SLanguage=en&p=3&m=ux42vs&s=471&hashedid=zmdncib4wrswqjrt&os=&no=e2df6235-08a1-4f4c-a6c1-ad53d00448bc