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

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

[bugzilla-daemon]

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

            Bug ID: 104271
           Summary: Boot crashes on Lenovo W520 KVM and Discrete Graphic
                    enabled in BIOS
           Product: Virtualization
           Version: unspecified
    Kernel Version: 4.1.6
          Hardware: Intel
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: blocking
          Priority: P1
         Component: kvm
          Assignee: virtualization_kvm@kernel-bugs.osdl.org
          Reporter: streibel.2003@gmx.net
        Regression: No

Booting stops/crashes on a Lenovo W520 Notebook with these BIOS Settings:
- Virtualization
  Intel Virtualization Technology: Enabled
  Intel VT-d Feature: Enabled
- Display
  Boot Display Device: ThinkPad LCD
  Graphics Device: Discrete Graphics
  OS Detection for NVIDIA Optimus: Disabled

Booting starts and the last lines show that the kernel cannot access the hard
disks (lines starting with ata2 and ata1). The last lines are:

[ TIME ] Timed out waiting for device dev-disk-by\x2duuid-c30...4394b6b.device.
[ DEPEND ] Dependency failed for
/dev/disk/by-uuid/c305bd9f-9d6...7-359b94394b6b.
[ DEPEND ] Dependency failed for Swap.

After that booting stops.

Additional Information:
- This is no hardware fault. The error can be reproduced on a different W520.

- Booting also crashes with these kernels:
  -  3.16.0 (kernel from Debian Jessie)
  -  4.1.0 (backported kernel to Debian Jessie)

- Booting succeeds if:
  - both virtualization flags are set to Disabled in the BIOS
  or
  - Graphics Device is set to "Optimus" in the BIOS

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

[bugzilla-daemon]

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

Hans Streibel <streibel.2003@gmx.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|Boot crashes on Lenovo W520 |Boot crashes on Lenovo W520
                   |KVM and Discrete Graphic    |with KVM and Discrete
                   |enabled in BIOS             |Graphic enabled in BIOS

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[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

Huaitong Han <oenhan@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |oenhan@gmail.com

--- Comment #1 from Huaitong Han <oenhan@gmail.com> ---
Does it work well on windows? I guess it's a BIOS problem. finding a avaliable
disk device is the job of BIOS, and the problem just right occurs when you
change the BIOS settings.

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

[bugzilla-daemon]

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

--- Comment #2 from Hans Streibel <streibel.2003@gmx.net> ---
Yes, it works on Windows 7. I did not recognize any problems there.
Ok, I did not try any virtualization like Virtual Box under Windows,
but everything else seems to work.

Even if it is a BIOS problem, then Windows obviously found a way to handle it.

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

[bugzilla-daemon]

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

Alex Williamson <alex.williamson@redhat.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |alex.williamson@redhat.com

--- Comment #3 from Alex Williamson <alex.williamson@redhat.com> ---
You might get more attention moving this bug to Drivers/PCI and including the
full dmesg or console log of the failure and lspci -vvv so we know something
about your system.  If it doesn't boot, there are always screen shots or
netconsole if you're serial port challenged.

KVM is a hypervisor, it has nothing to do with your system not booting.  More
likely it's something with the IOMMU.  Does disabling VT-d help?  What about
booting with iommu=pt?  BTW, reproducing on another W520 doesn't mean the
hardware isn't broken, it just means this isn't a point defect.  Hardware is
broken a disturbing amount of the time.

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[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

--- Comment #4 from Hans Streibel <streibel.2003@gmx.net> ---
Created attachment 187321
  --> https://bugzilla.kernel.org/attachment.cgi?id=187321&action=edit
Output of lspci -vvv

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[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@gmx.net> changed:

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

--- Comment #5 from Hans Streibel <streibel.2003@gmx.net> ---
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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[Bug 104271] Boot crashes on Lenovo W520 with KVM and Discrete Graphic enabled in BIOS

[bugzilla-daemon]

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

Hans Streibel <streibel.2003@gmx.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |streibel.2003@gmx.net

--- Comment #6 from Hans Streibel <streibel.2003@gmx.net> ---
As Alex suggested I moved this bug to Drivers/PCI to get more attention.
However now I have the impression that this bug does not get any attention at
all any more.

Did I miss any necessary action beside moving this to Drivers/PCI?

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