Public bug reported:
ThinkPad X1 Carbon Gen3.
With the 3.19.0-25 kernel included in the 14.04-3 ISO download all works
perfectly.
The first software updates include 3.19.0-30 kernel which exhibits the
issue:
Display pauses at Drive Encryption password, but you cannot see anything
beyond a white screen with uneven black vertical lines. Typing the drive
encryption password seems to affect this corrupted screen and then
hitting enter results in the the boot process continuing.
Once it reaches lightdm all is well.
Installing mainline kernel 3.19.8-031908ckt7 still suffers from display
corruption - block characters instead of text for example - but a new
Drive Encryption password prompt appears which works fine.
Uncertain if this is an i915 bug or a plymouth bug or both. I note that
there were a number of i915 changes between 3.19.0-25 and 3.19.0-30.
See screen photograph attachment.
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: plymouth 0.8.8-0ubuntu17.1
ProcVersionSignature: Ubuntu 3.19.0-30.34~14.04.1-generic 3.19.8-ckt6
Uname: Linux 3.19.0-30-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.15
Architecture: amd64
CurrentDesktop: Unity
Date: Wed Oct 7 15:33:07 2015
DefaultPlymouth: /lib/plymouth/themes/ubuntu-logo/ubuntu-logo.plymouth
InstallationDate: Installed on 2015-10-05 (2 days ago)
InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
MachineType: LENOVO 20BS006EUK
ProcCmdLine: BOOT_IMAGE=/vmlinuz-3.19.0-30-generic
root=/dev/mapper/ubuntu--vg-root ro quiet splash elevator=noop vt.handoff=7
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.19.0-30-generic
root=/dev/mapper/ubuntu--vg-root ro quiet splash elevator=noop vt.handoff=7
SourcePackage: plymouth
TextPlymouth: /lib/plymouth/themes/ubuntu-text/ubuntu-text.plymouth
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/12/2015
dmi.bios.vendor: LENOVO
dmi.bios.version: N14ET28W (1.06 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20BS006EUK
dmi.board.vendor: LENOVO
dmi.board.version: SDK0E50510 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.modalias:
dmi:bvnLENOVO:bvrN14ET28W(1.06):bd03/12/2015:svnLENOVO:pn20BS006EUK:pvrThinkPadX1Carbon3rd:rvnLENOVO:rn20BS006EUK:rvrSDK0E50510WIN:cvnLENOVO:ct10:cvrNone:
dmi.product.name: 20BS006EUK
dmi.product.version: ThinkPad X1 Carbon 3rd
dmi.sys.vendor: LENOVO
** Affects: plymouth (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug trusty
** Attachment added: "Screen photograph"
https://bugs.launchpad.net/bugs/1503716/+attachment/4487308/+files/IMAG1412.jpg
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1503716
Title:
Display corruption during boot process
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/plymouth/+bug/1503716/+subscriptions
--
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
