[Bug 104271] Boot crashes on Lenovo W520 with KVM and Discrete Graphic enabled in BIOS

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https://bugzilla.kernel.org/show_bug.cgi?id=104271

Hans Streibel <streibel.2003@xxxxxxx> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|kvm                         |PCI
            Version|unspecified                 |2.5
            Product|Virtualization              |Drivers

--- Comment #5 from Hans Streibel <streibel.2003@xxxxxxx> ---
Ok, will move it to Drivers/PCI.

Output of lspci -vvv now is in the appendix.
Output of dmesg is not included because that only shows output of a
successfully booted kernel. I even installed bootlogd but its log file does not
show error messages.

I made some pictures with my camera but I do not dare to attach those somewhat
big jpg files here. But if you really need them I can attach them.

The trouble starts (most of the time) right behind the line:
shpchp: Standard Hot Plug PCI Controller Driver Version: 0.4

Yes, disabling VT-d did help. Booting succeeded again.
Using "iommu=pt" however did not help. Same symptoms.

BTW, I wanted to express that my special notebook is not broken.
Not more broken that all (many/most) of the others W520s around.

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