[Bug 1518018] [NEW] Secure boot fails after upgrade to 15.10

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I was previously running XUbuntu 15.04 on my Asus UX303L laptop.

The configuration is dual boot with windows 8.1.

I ran the upgrade via the software updater and it proceeded normally.

Upon reboot, I got a red screen saying that something was wrong with
secure boot and it had to be fixed in the BIOS.

In BIOS, I disabled Secure boot and was again able to access XUbuntu.

I would like to re-enable secure boot, but cannot.

I am happy to help debugging in any way - I am a qualified computer
scientist.

Sincere thanks,
Bob

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: linux-image-4.2.0-18-generic 4.2.0-18.22
ProcVersionSignature: Ubuntu 4.2.0-18.22-generic 4.2.3
Uname: Linux 4.2.0-18-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.19.1-0ubuntu5
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  bob        1533 F.... pulseaudio
 /dev/snd/controlC1:  bob        1533 F.... pulseaudio
CurrentDesktop: XFCE
Date: Thu Nov 19 19:25:08 2015
HibernationDevice: RESUME=UUID=e7d92749-23e5-464f-93dc-6e0826746396
InstallationDate: Installed on 2015-05-11 (192 days ago)
InstallationMedia: Xubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422.1)
Lsusb:
 Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
 Bus 001 Device 003: ID 8087:0a2a Intel Corp. 
 Bus 001 Device 002: ID 064e:9700 Suyin Corp. Asus Integrated Webcam
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: ASUSTeK COMPUTER INC. UX303LNB
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-18-generic.efi.signed root=UUID=eba1a0f5-161a-4061-99a4-b5598f7692c1 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-4.2.0-18-generic N/A
 linux-backports-modules-4.2.0-18-generic  N/A
 linux-firmware                            1.149.2
SourcePackage: linux
UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
UpgradeStatus: Upgraded to wily on 2015-11-19 (0 days ago)
dmi.bios.date: 01/22/2015
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: UX303LNB.206
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: UX303LNB
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK COMPUTER INC.
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrUX303LNB.206:bd01/22/2015:svnASUSTeKCOMPUTERINC.:pnUX303LNB:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnUX303LNB:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
dmi.product.name: UX303LNB
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK COMPUTER INC.

** Affects: shim (Ubuntu)
     Importance: Undecided
         Status: Incomplete


** Tags: amd64 apport-bug wily
-- 
Secure boot fails after upgrade to 15.10
https://bugs.launchpad.net/bugs/1518018
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