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Re: [win-pv-devel] Win-pv driver install success fails to boot
Thanks Chris. Glad to hear you got it working.
Cheers,
Paul
From:
chris [mailto:tknchris@xxxxxxxxx]
Sent: 23 October 2016 07:34
To: Paul Durrant <Paul.Durrant@xxxxxxxxxx>
Cc: win-pv-devel@xxxxxxxxxxxxxxxxxxxx
Subject: Re: [win-pv-devel] Win-pv driver install success fails to boot
hello,
finally got a chance to revisit this and just wanted to share that i got it working for the archives
tried several times and installing each driver would succeed but on reboot windows would get stuck booting at the spinning dots and never boot the desktop
this was on a fully up to date server 2012 r2 x64 with all windows updates
anyway during trial and error i and killed the vm and started it again and startup repair came up and i picked safe mode and surprisingly it let me into safe mode, when
i checked device manager it was showing only the emulated devices so i re-ran the dpinst.exe for each driver again and rebooted and surprisingly windows booted up normal. i checked the device manager and saw the PV devices and emulated device were gone
did some tests and io is dramatically better so the new drivers are definitely working
anyway nice to have to it working now and the drivers being signed was very nice to have so thanks for all the effort its great to have legit signed drivers
On Mon, Jul 25, 2016 at 4:13 AM, Paul Durrant <Paul.Durrant@xxxxxxxxxx> wrote:
There’s a multitude of reasons why your VM may not be
booting after messing with the config. You haven’t actually said how it is failing but, since you do have
testsigning enabled, my next guess is that you are getting a 0x7B blue screen at boot time. If so, this is because the XENFILT filter driver is still installed and is instructing QEMU to unplug emulated devices
at boot time.
To stop it from doing this you have a couple of options:
-
Find all the instances of
UpperFilters where XENFILT is specified (under HKLM/System/CurrentControlset/Control/Class) and remove them.
-
Look under HKLM/System/CurrentControlSet/Services/XEN/Unplug and remove
any DISKS value you may find there.
Once you have done one or both of these you should be
able to reboot your VM and emulated devices will stay plugged.
The PV drivers log to QEMU, if you are running qemu
trad, you should see output in the qemu log file. If you are running upstream QEMU you’ll need to enable the
xen_platform_log event before you get any logging.
Paul
OK. I changed the config back and i still cant boot. I did have testsigning enabled and rebooted twice before
attempting to install the drivers.
Any idea why windows cant boot? I followed the instructions to the letter so I am trying to understand why its not working.
Also, even though I could reinstall I'd like to work through getting the drivers disabled / uninstalled and
get things booting again so I am familiar with this process. I don't really think its wise to just reinstall then down the line deploy this into production and have something like this happen and not have any solution other than reinstalling.
- tried booting in safe mode
- tried booting into a command prompt and tried renaming all the xen*.sys files in c:\windows\system32\drivers\
- tried booting into command prompt and doing bootrec /fixboot, bootrec /fixmbr, bootrec /rebuildbcd
Whats the process to reverse the installation and get windows to boot?
On Fri, Jul 22, 2016 at 4:45 AM, Paul Durrant <Paul.Durrant@xxxxxxxxxx>
wrote:
Hi Chris,
Don’t mess with the disk and network lines in your
config. You still need emulated disk to boot Windows as the firmware (SeaBIOS or ROMBIOS) does not have PV frontends. Once Windows starts and the PV drivers load they will instruct QEMU to unplug the emulated devices so that the PV devices can take their place.
As for recovering, it’s probably going to be tricky.
Since you were doing a fresh install it’s probably quicker to start again. The other thing to do *before* you install PV drivers (and I suspect this is the root of your problem) is to enable test signed drivers
in Windows. Windows 10 (even 32-bit) will not load test signed drivers unless you have done:
bcdedit /set testsigning on
Hope that helps,
Paul
Hello,
I am a previous gplpv user who recently came across this project and wanted to give a try to atleast help provide
feedback and testing.
I downloaded the latest drivers via the tar files on this page:
I extracted and ran dpinst as noted in the readme txt for each driver and saw that in device manager it created
some new devices. NOTE this is a clean install and did not have gplpv or any other drivers previously
I shutdown the domu, changed my disk and network lines to use the PV style:
'file:/mnt/vil1064/vil1064-ssd.img,xvda,w',
vif = ['type=netfront, bridge=xenbr0, mac=00:16:3D:37:A0:A3']
and when i tried to start it up, it gets stuck at windows 10 loading screen with the logo and the spinning wheel
underneath. i left it for several hours and it never got any further nor did it bsod'd or reboot over and over.
i went back and changed my config back to emulated interfaces and windows 10 does not start via the original
config either
did i miss some critical step(s)? any ideas why the OS wont boot? whats he best to remove the drivers and try
again?
i am a fairly technical linux and windows user and willing to invest some time to anything that will help so
please let me know if theres any more info or anything i can do to give you more data
the dom0 is a up to date debian jessie, xl info gives:
version : #1 SMP Debian 3.16.7-ckt11-1+deb8u5 (2015-10-09)
hw_caps : 178bf3ff:efd3fbff:00000000:00001300:00802001:00000000:000837ff:00000000
xen_caps : xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0-x86_32 hvm-3.0-x86_32p hvm-3.0-x86_64
platform_params : virt_start=0xffff800000000000
xen_commandline : placeholder dom0_mem=1024M
cc_compiler : gcc (Debian 4.9.2-10) 4.9.2
cc_compile_by : ultrotter
cc_compile_date : Thu Jun 11 18:24:17 EEST 2015
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