Public bug reported:
On this I+N hybrid graphic system, when switching to Virtual Terminal
with Ctrl + Alt + F1, the display will start blinking and
Steps:
1. Install 14.04.2 + update
2. Switch to VT with Ctrl + Alt + F1
3. Switch back with Ctrl + Alt + F7
Expected result:
Everything should work as expected.
Actual result:
It will start blinking, error message could be found in dmesg output, please
find the attachment for the video.
[ 3765.731436] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR*
CPU pipe A FIFO underrun
ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: linux-image-3.19.0-20-generic 3.19.0-20.20
ProcVersionSignature: Ubuntu 3.19.0-20.20-generic 3.19.8
Uname: Linux 3.19.0-20-generic x86_64
ApportVersion: 2.17.2-0ubuntu1.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: ubuntu 1205 F.... pulseaudio
/dev/snd/controlC0: ubuntu 1205 F.... pulseaudio
CurrentDesktop: Unity
Date: Sun Jun 14 22:48:50 2015
HibernationDevice: RESUME=UUID=e9508693-344c-4086-8491-70a51cabd161
InstallationDate: Installed on 2015-06-12 (2 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
IwConfig:
eth0 no wireless extensions.
lo no wireless extensions.
MachineType: Dell Inc. Vostro 3458
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-20-generic
root=UUID=ed5bbf8c-21d8-4bca-ae2b-d803cc0fc1ad ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.19.0-20-generic N/A
linux-backports-modules-3.19.0-20-generic N/A
linux-firmware 1.143.1
RfKill:
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: 01/07/2015
dmi.bios.vendor: Dell Inc.
dmi.bios.version: X13
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 9
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvrX13:bd01/07/2015:svnDellInc.:pnVostro3458:pvr01:rvnDellInc.:rn:rvr:cvnDellInc.:ct9:cvr:
dmi.product.name: Vostro 3458
dmi.product.version: 01
dmi.sys.vendor: Dell Inc.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: 201501-16341 amd64 apport-bug taipei-lab vivid
** Attachment added: "test.mp4"
https://bugs.launchpad.net/bugs/1465108/+attachment/4414934/+files/test.mp4
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https://bugs.launchpad.net/bugs/1465108
Title:
[Dell Vostro 3458] System will start blinking after switch to virtual
terminal
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