01-11-2012 11:41 PM
I found the performance of the Nouveau to be unsuitable for my needs. Battery life was significantly reduced, and the video performance was poor.
Using the 295.09 beta driver (from the Nvidia website) under 64 bit Ubuntu 12.04 alpha and Intel VT-x enabled, the lockup no longer occurs.
04-01-2012 03:07 AM
Under BIOS 1.36, Ubuntu 12.04 Beta2, Linux xxxx 3.2.0-21-generic #34-Ubuntu SMP Fri Mar 30 04:25:35 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux, the problem still occurs.
When I disable VT-d, it becomes stable but I guess VMWare becomes slow and I bought the laptop for use of VMWare.....
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/776999 gives interesting information.
Indeed, with the nox2apic kernel option, I can still enable VT-d, nvidia 295.33 and things stay stable.
But whats is impact of nox2apic ? That you have to keep devices running with less IRQs ?
Its a shame that Lenovo doesn't do anything about this.
Maybe the new distro releases (Ubuntu, Mint etc) will give some pressure on Lenovo when ppl start complaining that they bought a high end that doesn't boot right out of the box with Ubuntu etc.
How different from the IBM days when Linux got very well supported on Thinkpads.
Dark clouds start to form over America.
04-10-2012 07:34 PM - last edited on 04-10-2012 10:34 PM by andyP
04-10-2012 11:18 PM
My experience is based on 11.10 64 bit. The original out of the box nvidia driver was 280.xx (can't remember). <- This, I didn't have issue with booting.
A system update then update the driver to 295.33...and I immediately can't boot into X straight away.
05-06-2012 04:52 AM
I am experiencing the same problem on a fresh W520 with a clean factory installation of Windows Professional 64 bit. My factory installed UEFI BIOS version is: 8BET56WW (1.36) dated 2012-01-19. The machine is based on an Intel i7-2760QM. The default graphics device selected in BIOS is NVIDIA Optimus.
The machine booted fine with Intel Virtualization Technology disabled. However, when I enabled both Intel VT and Intel VT-d Feature at the same time, the machine hanged repeatedly at the ThinkPad boot page. When I disabled VT-d, leaving VT enabled, the machine booted fine. When I returned to BIOS set-up and re-enabled VT-d, the machine successfully booted. Possible indication: avoid switching both VT and VT-d from disabled to enabled in one move.
05-11-2012 01:04 PM
I have this problem too. I need VT-d for VirtualBox. I have found that "nox2apic" gets me through. But what is the downside to this option?
nVidia Quadro 1000M
01-29-2013 12:07 AM
I hit the same issue on Ubuntu 12.10 AMD64. Adding the kernal flag nox2apic fixed it aswell. In the kernel this bug is tracked here: https://bugzilla.kernel.org/show_bug.cgi?id=43054
That also contains a fix, which is to disable the x2apic support for some hardware configurations. Would have been nicer if Lenovo would release a BIOS fix. They had quite good linux support in the past.