** Tags added: kernel-da-key regression-update -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1472794
Title: [Acer Aspire 5250] Black screen after upgrade to 3.19.0-22-generic Status in linux package in Ubuntu: Confirmed Bug description: After upgrade to linux-image-3.19.0-22-generic on Acer Aspire 5250/HMA51-BZ there is nothing displayed after Grub. Playing with (Ctrl-)Alt-F1, F2, ..., F7, F8... doesn't have any visible effect - so neither VT nor X is visible. Removing "quiet splash" from kernel arguments also doesn't show anything after the message from grub that it's loading the kernel. The laptop seems to boot normally, I can hear the lightdm sound that it's ready, but I cannot see anything on the display. I can log in remotely. The backlight is on, so it's not a cause of no backlight. (I checked this by poking around /sys/class/backlight and I see it's set at full brightness.) If I boot linux-image-3.19.0-21-generic everything works OK. I don't see anything obvious when I look at the diff of dmesg between 3.19.0-21 and 3.19.0.22, but if it's useful I can attach dmesg from 3.19.0-21. According to lspci this is the GPU: 00:01.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Wrestler [Radeon HD 6310] ProblemType: Bug DistroRelease: Ubuntu 15.04 Package: linux-image-3.19.0-22-generic 3.19.0-22.22 ProcVersionSignature: Ubuntu 3.19.0-22.22-generic 3.19.8-ckt1 Uname: Linux 3.19.0-22-generic x86_64 ApportVersion: 2.17.2-0ubuntu1.1 Architecture: amd64 AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/controlC0', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: Date: Wed Jul 8 22:49:55 2015 HibernationDevice: RESUME=UUID=2552e9df-add8-4cc9-abe7-e75f869c1d08 InstallationDate: Installed on 2013-02-14 (873 days ago) InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5) Lsusb: Bus 002 Device 002: ID 064e:d250 Suyin Corp. Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub MachineType: Acer Aspire 5250 ProcFB: 0 radeondrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-22-generic root=UUID=84cf2e2d-2e23-4ced-a3ed-94d793f6cefd ro quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-3.19.0-22-generic N/A linux-backports-modules-3.19.0-22-generic N/A linux-firmware 1.143.1 SourcePackage: linux UpgradeStatus: Upgraded to vivid on 2015-07-02 (5 days ago) dmi.bios.date: 11/17/2011 dmi.bios.vendor: Acer dmi.bios.version: V1.06 dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: HMA51-BZ dmi.board.vendor: Acer dmi.board.version: Base Board Version dmi.chassis.type: 10 dmi.chassis.vendor: Acer dmi.chassis.version: V1.06 dmi.modalias: dmi:bvnAcer:bvrV1.06:bd11/17/2011:svnAcer:pnAspire5250:pvrV1.06:rvnAcer:rnHMA51-BZ:rvrBaseBoardVersion:cvnAcer:ct10:cvrV1.06: dmi.product.name: Aspire 5250 dmi.product.version: V1.06 dmi.sys.vendor: Acer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1472794/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
