Opened 12 years ago

Closed 12 years ago

#10528 closed defect (fixed)

64-bit win7 guest freezes 32-bit ubuntu 12.04 host => Fixed in SVN

Reported by: Dovber Shapiro Owned by:
Component: host support Version: VirtualBox 4.1.14
Keywords: io-apic host freeze Cc:
Guest type: Windows Host type: Linux


after upgrading ubuntu to 12.04, trying to start a Win7 64 bit guest, freezes the host which is 32-bit, when trying to power it on. If I disable io-apic the guest will boot up and go to a windows stop screen, (expected behavior when disabling io-apic after installing windows).

Attachments (2)

Win7-2012-05-08-08-33-45.log (44.9 KB ) - added by Dovber Shapiro 12 years ago.
Ubuntu_12.04_32bit.log (46.9 KB ) - added by roryg 12 years ago.

Download all attachments as: .zip

Change History (10)

comment:1 by Frank Mehnert, 12 years ago

Please attach a VBox.log file of such a VM session. Even if the host freezes there should be such a file available (GUI / Machine menu / Show Log File...)

Which was the previous VBox version you used to successfully boot this guest? Was it VirtualBox 4.1.2 from Ubuntu 11.10?

by Dovber Shapiro, 12 years ago

comment:2 by Dovber Shapiro, 12 years ago

This worked under Ubuntu 11.10 with Virtualbox 4.1.4. I have attached a log from trying to boot with io-apic enabled, the host hung after a few minutes and neeeded to be hard rebooted

comment:3 by roryg, 12 years ago

I've had the same issue, just with Windows Server 2003 64 bit. Running on Ubuntu 12.04 32 bit, Dell Vostro 3750, Intel i7 2670QM. I'll attach a log as well.

by roryg, 12 years ago

Attachment: Ubuntu_12.04_32bit.log added

comment:4 by Frank Mehnert, 12 years ago

This is again some problem with the NMI watchdog of recent Linux kernels. A workaround is to add nmi_watchdog=0 nowatchdog to the command line of the host kernel. After a reboot, 64-bit guests should run stable on such 32-bit hosts. If some users could confirm this would be helpful.

We are currently investigating the problem. The real fix is to disable the NMI during the world switch. We already do that but obviously something is missing.

comment:5 by Frank Mehnert, 12 years ago

Summary: 64-bit win7 guest freezes 32-bit ubuntu 12.04 host64-bit win7 guest freezes 32-bit ubuntu 12.04 host => Fixed in SVN

Finally found and fixed the problem. The fix is in r41645. This fix is required to run 64-bit guests on 32-bit Linux hosts. Not relevant for other hosts.

comment:6 by Martin Wildam, 12 years ago

@frank: Let me kiss your feet for providing the workaround and fix! BTW: Thanks to bph in here the complete list of steps to do the workaround:

  1. open a terminal window
  2. type "sudo gedit /etc/default/grub" (without the quotes) and press enter
  3. Comment out the line GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" by adding a "#" character in front.
  4. Add new line below: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nmi_watchdog=0 nowatchdog"
  5. Save and exit
  6. type "sudo update-grub" (without the quotes) and press enter
  7. reboot.

comment:7 by Martin Wildam, 12 years ago

Note: I did not have this problem from the beginning with the newer kernels and first it did not happen all the time (even if very often). I did several changes (uninstalled latest updated packages etc) which first seem to help but not in the long run. Since 2 days it happened nearly ever on two machines - and finally I found this - so many thanks again!

comment:8 by Frank Mehnert, 12 years ago

Resolution: fixed
Status: newclosed

Fix in VBox 4.1.18. Martin, thanks for your feedback!

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