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: [email protected]
Reporter: [email protected]
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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