teownt, thank you for providing the requested information. I was already aware of what CSM is, I was simply interested in if it changed anything.
Despite this, one thing that would be quite helpful is having this fully commit bisected from Precise to Trusty, in order to identify the offending commit. Could you please do this following https://wiki.ubuntu.com/Kernel/KernelBisection ? ** Description changed: Same description/workaround as https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1263015 + + I tried both Enable CSM and non-CSM boot. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.12.0-7-generic 3.12.0-7.15 ProcVersionSignature: Ubuntu 3.12.0-7.15-generic 3.12.4 Uname: Linux 3.12.0-7-generic x86_64 ApportVersion: 2.12.7-0ubuntu3 Architecture: amd64 Date: Thu Jan 2 09:59:33 2014 HibernationDevice: RESUME=UUID=e6458b44-fdb9-4db5-8cac-40ee0bbf9cf6 InstallationDate: Installed on 2013-12-31 (1 days ago) InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20131231) Lsusb: - Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub - Bus 001 Device 004: ID 03eb:8a03 Atmel Corp. - Bus 001 Device 003: ID 1bcf:2987 Sunplus Innovation Technology Inc. - Bus 001 Device 002: ID 8087:07dc Intel Corp. - Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub + Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub + Bus 001 Device 004: ID 03eb:8a03 Atmel Corp. + Bus 001 Device 003: ID 1bcf:2987 Sunplus Innovation Technology Inc. + Bus 001 Device 002: ID 8087:07dc Intel Corp. + Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: ASUSTeK COMPUTER INC. UX302LG ProcFB: 0 simple ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.12.0-7-generic.efi.signed root=/dev/mapper/ubuntu--vg-root ro recovery nomodeset RelatedPackageVersions: - linux-restricted-modules-3.12.0-7-generic N/A - linux-backports-modules-3.12.0-7-generic N/A - linux-firmware 1.117 + linux-restricted-modules-3.12.0-7-generic N/A + linux-backports-modules-3.12.0-7-generic N/A + linux-firmware 1.117 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 10/30/2013 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: UX302LG.207 dmi.board.asset.tag: ATN12345678901234567 dmi.board.name: UX302LG 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.:bvrUX302LG.207:bd10/30/2013:svnASUSTeKCOMPUTERINC.:pnUX302LG:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnUX302LG:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0: dmi.product.name: UX302LG dmi.product.version: 1.0 dmi.sys.vendor: ASUSTeK COMPUTER INC. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1265544 Title: 8086:0a16 [UX302LG] black screen on boot 3.12.0-7 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1265544/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
