[Bug 1811755] Re: X1 Extreme: only one of the two SSDs is loaded

Final reminder to please test the kernel above to ensure it fixes the
problem for which this bug was filed. Thanks in advance!

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Title:
X1 Extreme: only one of the two SSDs is loaded

Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Bionic:
Fix Committed
Status in linux source package in Cosmic:
Fix Committed

Bug description:
[Impact]
On Thinkpad X1 Extreme with two SSDs, if NQN in the firmware are
identical, then only one drive can be seen. NQN is supposed to be unique
but some Intel drives do not follow that.

[Fix]
The device-supplied subnqn is ignored and one will be generated as if
the field is empty.

The upstream patch conflicts with a value in 'enum nvme_quirks' that we
added in a SAUCE patch, changed that from (1<<8) to (1<<15).

[Test]
With this fix, both drives can be seen.

[Regression Potential]
The fix limits to Intel 760p/Pro 7600p SSD, and the fix has been
verified by the bug reporter.

---------

I bought a new Thinkpad X1 Extreme, and had it come with two SSDs, one
256G and the other 512G with the intention of keeping the windows on
the 256G disk and using the 512G for linux.

When dealing with the installer, it only ever saw one of the SSDs. I
did manged to get bionic installed on the 512, but on boot, sometimes
it doesn't find the 512G disk and I just get a blank screen. After a
hard power-off, and reboot, it drops into the grub selector, and
choosing linux, it failed again, but this time dropped into a VT.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-43-generic 4.15.0-43.46
ProcVersionSignature: Ubuntu 4.15.0-43.46-generic 4.15.18
Uname: Linux 4.15.0-43-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.5
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: tim 2003 F.... pulseaudio
 /dev/snd/controlC0: tim 2003 F.... pulseaudio
CurrentDesktop: ubuntu:GNOME
Date: Tue Jan 15 18:53:34 2019
InstallationDate: Installed on 2019-01-14 (0 days ago)
InstallationMedia: Ubuntu 18.04.2 LTS "Bionic Beaver" - Beta amd64 (20190109)
MachineType: LENOVO 20MFCTO1WW
ProcFB: 0 nouveaufb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-43-generic root=UUID=9254da2f-0220-4b41-8770-ae4b0df0d114 ro quiet splash vt.handoff=1
RelatedPackageVersions:
 linux-restricted-modules-4.15.0-43-generic N/A
 linux-backports-modules-4.15.0-43-generic N/A
 linux-firmware 1.173.3
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/21/2018
dmi.bios.vendor: LENOVO
dmi.bios.version: N2EET35W (1.17 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20MFCTO1WW
dmi.board.vendor: LENOVO
dmi.board.version: SDK0R32862 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.modalias: dmi:bvnLENOVO:bvrN2EET35W(1.17):bd12/21/2018:svnLENOVO:pn20MFCTO1WW:pvrThinkPadX1Extreme:rvnLENOVO:rn20MFCTO1WW:rvrSDK0R32862WIN:cvnLENOVO:ct10:cvrNone:
dmi.product.family: ThinkPad X1 Extreme
dmi.product.name: 20MFCTO1WW
dmi.product.version: ThinkPad X1 Extreme
dmi.sys.vendor: LENOVO

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