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[Bug 1452166] Re: screen flickering at boot

 

skt.diaz, thank you for reporting this and helping make Ubuntu better.
Could you please test the latest upstream kernel available from the very
top line at the top of the page (the release names are irrelevant for
testing, and please do not test the daily folder) following
https://wiki.ubuntu.com/KernelMainlineBuilds ? It will allow additional
upstream developers to examine the issue.

If the test did not allow you to test to the issue (ex. you couldn't boot into the OS) please make a comment in your report about this, and continue to test the next most recent kernel version until you can test to the issue. Once you've tested the upstream kernel, please comment on which kernel version specifically you tested. If this bug is fixed in the mainline kernel, please add the following tags by clicking on the yellow circle with a black pencil icon, next to the word Tags, located at the bottom of the report description:
kernel-fixed-upstream
kernel-fixed-upstream-X.Y-rcZ

Where XY and Z are numbers corresponding to the kernel version.

If the mainline kernel does not fix this bug, please add the following tags:
kernel-bug-exists-upstream
kernel-bug-exists-upstream-X.Y-rcZ

Once testing of the upstream kernel is complete, please mark this bug's
Status as Confirmed. Please let us know your results.

** Changed in: linux (Ubuntu)
       Status: Confirmed => Incomplete

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https://bugs.launchpad.net/bugs/1452166

Title:
  screen flickering at boot

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  everytime i start my computer a purple screen appears followed by a
  white flickering for 2 seconds. then screen goes black till login
  screen comes up. the ubuntu logo with progressing dots dont show up as
  they used to when i used ubuntu 14.10. i am using defalut radeon
  driver in 15.04. is there a fix for this because it looks very ugly
  when other people use my laptop. once booted up i have no problem with
  graphics. when i shut down i can see the ubuntu logo screen with dots.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: linux-image-3.19.0-16-generic 3.19.0-16.16
  ProcVersionSignature: Ubuntu 3.19.0-16.16-generic 3.19.3
  Uname: Linux 3.19.0-16-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.17.2-0ubuntu1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  jeet       1440 F.... pulseaudio
   /dev/snd/controlC1:  jeet       1440 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Wed May  6 13:47:41 2015
  HibernationDevice: RESUME=UUID=7ce5b8d0-4dd6-4291-b00f-c06a1b357f94
  InstallationDate: Installed on 2015-05-03 (3 days ago)
  InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
  MachineType: Dell Inc. Inspiron N5010
  ProcFB: 0 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-16-generic root=UUID=fe68578b-2d0a-44bf-ab60-93c06a3786b2 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.19.0-16-generic N/A
   linux-backports-modules-3.19.0-16-generic  N/A
   linux-firmware                             1.143
  SourcePackage: linux
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 07/19/2011
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A15
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A15
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: A15
  dmi.modalias: dmi:bvnDellInc.:bvrA15:bd07/19/2011:svnDellInc.:pnInspironN5010:pvrA15:rvnDellInc.:rn:rvrA15:cvnDellInc.:ct8:cvrA15:
  dmi.product.name: Inspiron N5010
  dmi.product.version: A15
  dmi.sys.vendor: Dell Inc.

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