Slow clock in VM in comparison to host => recompile kernel+vboxdrv

[Tatsh]

Hello everyone.

Gentoo is my distro, and I installed VirtualBox via emerge, upgrading from 1.6.2 to 1.6.4 in the process. I've rebooted several times since then and only today did I decide to run a VM again. vboxdrv is in my autoloaded modules and was working before with version 1.6.2. (I do not have an /etc/init.d/vboxdrv or vboxnet). I've tried re-emerging (and even emerge -C first) and then modprobing again but this does not have any effect. Also tried chowning the module to vboxusers group.

Basically, once the VM starts, the clock ticks slower than my normal computer clock. By the time a VM loads up, its time is lesser than my time and it is ticking slowly. The Windows XP time is always off and performance is spotty in comparison to before. The boot splash fades very slow, as well as the fade in of the BIOS text 'Press F12...'.

Log and kernel configuration are included.

This happened before with 1.6.2 but I messed around with the kernel configuration and VBox started working randomly again.

I describe it all here as well. ​http://forums.virtualbox.org/viewtopic.php?p=32844#32844

I'd appreciate any help with this. ~Tatsh

[Tatsh]

Example VBox log

[Tatsh]

Kernel configuration

[Tatsh]

dmesg says the following when I modprobe vboxdrv:

vboxdrv: Trying to deactivate the NMI watchdog permanently... vboxdrv: Successfully done. vboxdrv: Found 1 processor cores. vboxdrv: fAsync=0 u64DiffCores=1. vboxdrv: TSC mode is 'synchronous', kernel timer mode is 'normal'. vboxdrv: Successfully loaded version 1.6.2 (interface 0x00070002). vboxdrv: Trying to deactivate the NMI watchdog permanently... vboxdrv: Successfully done. vboxdrv: Found 1 processor cores. vboxdrv: fAsync=0 u64DiffCores=1. vboxdrv: TSC mode is 'synchronous', kernel timer mode is 'normal'. vboxdrv: Successfully loaded version 1.6.4 (interface 0x00080000).

[Tatsh]

sorry, reformatting above

vboxdrv: Trying to deactivate the NMI watchdog permanently...
vboxdrv: Successfully done.
vboxdrv: Found 1 processor cores.
vboxdrv: fAsync=0 u64DiffCores=1.
vboxdrv: TSC mode is 'synchronous', kernel timer mode is 'normal'.
vboxdrv: Successfully loaded version 1.6.2 (interface 0x00070002).
vboxdrv: Trying to deactivate the NMI watchdog permanently...
vboxdrv: Successfully done.
vboxdrv: Found 1 processor cores.
vboxdrv: fAsync=0 u64DiffCores=1.
vboxdrv: TSC mode is 'synchronous', kernel timer mode is 'normal'.
vboxdrv: Successfully loaded version 1.6.4 (interface 0x00080000).

[Tatsh]

Fixed by recompiling kernel then recompiling vboxdrv module and re-modprobing. No idea why this fixed it, but it did.

[Frank Mehnert]

Thanks for the report, this is what I thought: Some inconsistence between the running kernel and the kernel sources vboxdrv is compiled against. I will close the bug.