** Description changed: Recently, the following behaviour appeared suddenly: 1) Switch on computer - 2) Ubuntu splash screen appears with dots - 3) Screen turns black and switches off (no signal) + 3) Instead of showing password entry for encrypted boot SSD, screen turns black and switches off (no signal) 4) Nothing happens 5) Forcibly restart computer 6) Everything works fine This happens exactly like this every time I switch on the computer. - Previously I had removed all but the latest kernel [linux-lts-trusty - (3.13.0-48.80~precise1]), but this may be a coincidence because that - kernel started without problems before. + Previously I had removed all but the latest 3.16/3.13 kernels, but this + may be a coincidence because the latest kernels started without problems + before. - Note 1: My OS starts from an SSD. + UPDATE: + - Recently, the black screen always shows when booting the 3.6 kernel + - When booting from kernel 3.13, this problem does not appear anymore + + (Set default kernel to 3.13 as a workaround) + + Note 1: My OS starts from an SSD, encrypted via LUKS Note 2: My graphics card is recognised as Mobility Radeon HD 5430 - Note 3: A similar problem also appeared at the same time on an Ubuntu 12.04 LTS 64 bit installed on a different SSD on the same computer: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1441305 + Note 3: Ubuntu HWE is enabled (Kernel 3.16) + + Note 4: A similar problem also appeared at the same time on an Ubuntu 12.04 LTS 64 bit installed on a different SSD on the same computer: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1441305 However, there I got stuck with a black screen on *every* boot. In the end, changing the display manager to "gdm" fixed the problem. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: lightdm 1.10.5-0ubuntu1 ProcVersionSignature: Ubuntu 3.16.0-33.44~14.04.1-generic 3.16.7-ckt7 Uname: Linux 3.16.0-33-generic x86_64 ApportVersion: 2.14.1-0ubuntu3.8 Architecture: amd64 CurrentDesktop: Unity Date: Sun Apr 12 19:41:35 2015 EcryptfsInUse: Yes InstallationDate: Installed on 2014-07-23 (263 days ago) InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417) SourcePackage: lightdm UpgradeStatus: No upgrade log present (probably fresh install)
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to lightdm in Ubuntu. https://bugs.launchpad.net/bugs/1443144 Title: Stuck with black screen on every first boot (no signal) Status in lightdm package in Ubuntu: New Bug description: Recently, the following behaviour appeared suddenly: 1) Switch on computer 3) Instead of showing password entry for encrypted boot SSD, screen turns black and switches off (no signal) 4) Nothing happens 5) Forcibly restart computer 6) Everything works fine This happens exactly like this every time I switch on the computer. Previously I had removed all but the latest 3.16/3.13 kernels, but this may be a coincidence because the latest kernels started without problems before. UPDATE: - Recently, the black screen always shows when booting the 3.6 kernel - When booting from kernel 3.13, this problem does not appear anymore (Set default kernel to 3.13 as a workaround) Note 1: My OS starts from an SSD, encrypted via LUKS Note 2: My graphics card is recognised as Mobility Radeon HD 5430 Note 3: Ubuntu HWE is enabled (Kernel 3.16) Note 4: A similar problem also appeared at the same time on an Ubuntu 12.04 LTS 64 bit installed on a different SSD on the same computer: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1441305 However, there I got stuck with a black screen on *every* boot. In the end, changing the display manager to "gdm" fixed the problem. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: lightdm 1.10.5-0ubuntu1 ProcVersionSignature: Ubuntu 3.16.0-33.44~14.04.1-generic 3.16.7-ckt7 Uname: Linux 3.16.0-33-generic x86_64 ApportVersion: 2.14.1-0ubuntu3.8 Architecture: amd64 CurrentDesktop: Unity Date: Sun Apr 12 19:41:35 2015 EcryptfsInUse: Yes InstallationDate: Installed on 2014-07-23 (263 days ago) InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417) SourcePackage: lightdm UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1443144/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
