** Changed in: hwe-next
Assignee: (unassigned) => Timo Aaltonen (tjaalton)
--
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/1407913
Title:
In 3840x2160 high resolution mode, display would blink with Chrome /
Chromium browser opened, or with certain page in Firefox
Status in HWE Next Project:
Confirmed
Status in linux package in Ubuntu:
Confirmed
Bug description:
CID: 201410-15952 Dell Inspiron 7548
I'm not sure which package to blame with, I guess maybe it has something to
do with X, thing is:
when the system is running in 3840*2160 resolution, the display will blink
with these browsers under certain conditions.
Steps:
1. Install 14.04.1 + update + Chromium + Chrome
2. Make sure it's running with the highest resolution and open Chrome
(39.0.2171.95-1)
3. Make sure it's running with the highest resolution and open Chromium
(39.0.2171.65-0ubuntu0.14.04.1.1064)
4. Make sure it's running with the highest resolution and open Firefox
(34.0+build2-0ubuntu0.14.04.1)
5. Switch to the second-highest resolution mode and repeat 2-4
Expected result:
* Every browser should not intefere the display on this system.
Actual result:
* On step 2, display blinks right after Chrome opened, back to normal when
you close the browser
* On step 3, display blinks right after Chromium opened, back to normal when
you close the browser
* On step 4, it won't blink, but if you visit
https://bugzilla.mozilla.org/show_bug.cgi?id=1118140 with 100% zoom scale in
Firefox, it will blink. If you zoom in or out with ctrl +/- or close it, the
display will back to normal.
* On step 5, non of them will make the display blink
Note that when it's blinking, you can switch to console with Ctrl + Alt + F1
without any problem. And this happen to Firefox on some other pages as well.
Verified with:
3.16.0-28 + open source video driver
the latest mainline kernel 3.19.0-rc3 + open source video driver
3.13.0-43 + open source video driver
3.13.0-43 + the latest AMD video driver (14.501.1003) in both power-saving
and performance mode
they all have the same behaviour.
Please find the attachment for screencast from step 2 to 4.
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-43-generic 3.13.0-43.72
ProcVersionSignature: Ubuntu 3.13.0-43.72-generic 3.13.11.11
Uname: Linux 3.13.0-43-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.6
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: ubuntu 1766 F.... pulseaudio
/dev/snd/controlC0: ubuntu 1766 F.... pulseaudio
CRDA:
country TW:
(2402 - 2472 @ 40), (3, 27)
(5270 - 5330 @ 40), (3, 17), DFS
(5735 - 5815 @ 40), (3, 30)
CurrentDesktop: Unity
Date: Tue Jan 6 03:43:19 2015
HibernationDevice: RESUME=UUID=3121f09d-4ad7-4946-b905-ee8e56a6d914
InstallationDate: Installed on 2015-01-05 (0 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64
(20140722.2)
MachineType: Dell Inc. Inspiron 7548
ProcFB:
0 inteldrmfb
1 radeondrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-43-generic.efi.signed
root=UUID=57666a30-96f3-478b-b3c1-3879ce81c53f ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.13.0-43-generic N/A
linux-backports-modules-3.13.0-43-generic N/A
linux-firmware 1.127.11
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/19/2014
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A00
dmi.board.name: BBE4C1
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: Not Specified
dmi.modalias:
dmi:bvnDellInc.:bvrA00:bd11/19/2014:svnDellInc.:pnInspiron7548:pvrA00:rvnDellInc.:rnBBE4C1:rvrA00:cvnDellInc.:ct8:cvrNotSpecified:
dmi.product.name: Inspiron 7548
dmi.product.version: A00
dmi.sys.vendor: Dell Inc.
To manage notifications about this bug go to:
https://bugs.launchpad.net/hwe-next/+bug/1407913/+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
