After reboot root partition password prompt is displayed on laptop screen even when connected to external display

[Timo Harmonen]

Lenovo t440s with encrypted root partition, connected to Lenovo docking station and attached to DELL monitor. Restart the system laptop lid closed.

Shutdown and restart: Boot time screen and encrypted partition password prompt are correctly shown on monitor.

Reboot: Boot time screen and encrypted partition password prompt are shown on laptop screen, not on monitor. External display wakes up only when the login prompt is displayed.

Attached shutdown.dmesg and reboot.dmesg respectively.

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: systemd 219-4ubuntu5
ProcVersionSignature: Ubuntu 3.19.0-9.9-generic 3.19.1
Uname: Linux 3.19.0-9-generic x86_64
ApportVersion: 2.16.2-0ubuntu2
Architecture: amd64
CurrentDesktop: GNOME
Date: Fri Mar 13 09:36:46 2015
InstallationDate: Installed on 2015-03-07 (5 days ago)
InstallationMedia: Ubuntu-GNOME 15.04 "Vivid Vervet" - Alpha amd64 (20150304)
MachineType: LENOVO 20AQ007SMS
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.19.0-9-generic root=/dev/mapper/ubuntu--gnome--vg-root ro quiet splash vt.handoff=7
SourcePackage: systemd
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 02/10/2014
dmi.bios.vendor: LENOVO
dmi.bios.version: GJET71WW (2.21 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20AQ007SMS
dmi.board.vendor: LENOVO
dmi.board.version: SDK0E50510 PRO
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvrGJET71WW(2.21):bd02/10/2014:svnLENOVO:pn20AQ007SMS:pvrThinkPadT440s:rvnLENOVO:rn20AQ007SMS:rvrSDK0E50510PRO:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 20AQ007SMS
dmi.product.version: ThinkPad T440s
dmi.sys.vendor: LENOVO

[Brad Figg (brad-figg)]

This change was made by a bot.

[Joseph Salisbury (jsalisbury)]

Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem?

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.0 kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'.
Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.0-rc4-vivid/

[Timo Harmonen (timo-harmonen)]

This started after 3.19 kernel update.

I tested this with 4.0.0-040000rc4, 3.18.9-031809 and the default 3.19.0-10. The problem is only in 3.19 kernel.

[Joseph Salisbury (jsalisbury)]

Can you also test the latest 3.19 upstream stable kernel? This will tell us if the fix in 4.0-rc4 was also sent for inclusion in the stable releases. It can be downloaded from:

http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.19.3-vivid/

[Timo Harmonen (timo-harmonen)]

Tested with v3.19.3-vivid, this is fixed.

[Joseph Salisbury (jsalisbury)]

The Ubuntu 3.19.0-11 kernel has the latest upstream v3.19.3 updates. The current Vivid kernel is now: 3.19.0-15. Can you test the latest kernel in Vivid and see if this issue is now fixed?

[Timo Harmonen (timo-harmonen)]

I tested with 3.19.0-15-generic, this is not fixed, so root disk password prompt is not shown on external display. And I re-tested still with 3.19.3-031903-generic, that works fine.