Goran Obal, thank you for your comment. So your hardware and problem may be
tracked, could you please file a new report by executing the following in a
terminal with Ubuntu (not ZorinOS):
ubuntu-bug xorg
Please ensure you have xdiagnose installed, and that you click the Yes
button for attaching
I am confirming this issue. My laptop is DELL Vostro 3550. BIOS A11. I am using
ZorinOS since version 6, now I have installed version 7. I still have this
issue. I am finding though that the issue is worse by far if I use AMD GPU than
if I use Intel GPU. I switch between them with AMD CCC,
Not sure why this was flagged as Incomplete. Please let me know if you
require further information.
** Changed in: xorg-server (Ubuntu)
Status: Expired = Confirmed
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[Expired for xorg-server (Ubuntu) because there has been no activity for
60 days.]
** Changed in: xorg-server (Ubuntu)
Status: Incomplete = Expired
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Hi Christopher,
Thanks for taking the time to look at this. I've updated the BIOS as
requested.
$ sudo dmidecode -s bios-version sudo dmidecode -s bios-release-date
A11
08/03/2012
However I still see the display resolution switches after this (On
Saucy). I note that I still receive the dmesg
** Tags removed: bios-outdated-a11
** Tags added: latest-bios-a11
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Title:
Display resolution keeps switching with external monitor connected
To
apport information
** Tags added: apport-collected compiz-0.9 trusty ubuntu
** Description changed:
A fresh install of Ubuntu 11.10 on a Dell Vostro 3550 with all updates
(OSS only - no proprietary drivers).
When connecting the laptop to an external monitor to extend my desktop the
Hi Christopher,
This problem still occurs on Saucy (13.10) daily. I booted my laptop
using the lastest dev live CD as well, and it still exhibits the same
problem - apport info attached - apologies it looks like it's posted
twice.
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Lee Willis, thank you for providing the requested information. As per your
https://launchpadlibrarian.net/161911003/BootDmesg.txt :
[0.126308] [Firmware Bug]: ACPI: BIOS _OSI(Linux) query ignored
...
[5.052703] [drm] Wrong MCH_SSKPD value: 0x16040307
[5.052705] [drm] This can cause
Lee Willis, this bug was reported a while ago and there hasn't been any
activity in it recently. We were wondering if this is still an issue? If
so, could you please test for this with the latest development release
of Ubuntu? ISO images are available from http://cdimage.ubuntu.com
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: xorg-server (Ubuntu)
Status: New = Confirmed
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** No longer affects: xorg-server (Ubuntu)
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Title:
Display resolution keeps switching with external monitor connected
To manage notifications
Does anybody else find that, after the mode spontaneously changes,
opening the Displays settings causes it to change back, sometimes?
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Title:
On 12.04 with a Radeon HD 6400M, the kernel boot option
radeon.modeset=0 seems to solve the issue (almost).
Add this to /etc/default/grub:
GRUB_CMDLINE_LINUX=radeon.modeset=0
Then run:
sudo update-grub
This solves the continuous switching in the first few minutes after
login. However, it
happens to me too, on a Samsung R530 with just Intel graphics. Normally
it is a random revert to mirrored displays shortly after getting it set
up how I want it. After it does this once it then does dual monitor
pretty well. Display is normally connected over HDMI but I am fairly
sure I have seen
http://ubuntuforums.org/showthread.php?p=11387749#post11387749 another
user from forum ubuntu with this problem (also on vostro 3550)
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Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: xorg-server (Ubuntu)
Status: New = Confirmed
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Title:
I also have this problem, this issue appear in all linux distribution (I
checked mint,ubuntu,arch). I also try changed video driver, but I still
have this problem. (catalyst, intel).
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** Also affects: xorg-server (Arch Linux)
Importance: Undecided
Status: New
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Title:
Display resolution keeps switching with external
Couple of further bits of info. I've ruled out connector issues by
trying the same monitor with HDMIDVI rather than VGA output, same
issue.
I'd also note that the exact same laptop and monitor work flawlessly
when booted into Windows 7 so that should rule out any other hardware
related issues.
** Package changed: xorg (Ubuntu) = xorg-server (Ubuntu)
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Title:
Display resolution keeps switching with external monitor connected
To manage
After some notes on another bug, I've upgraded to the latest packages in
proposed, but I'm still seeing this behaviour.
List of current packages attached.
** Attachment added: package_list.txt
I've amended the status back to new as this is not an incomplete report
as far as I'm aware. Info has been provided as requested...
If there's further information required, happy to provide it.
** Changed in: xorg (Ubuntu)
Status: Incomplete = New
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You have a hybrid gfx setup, have you disabled the ATI chip from bios
(if possible)?
** Package changed: libdrm (Ubuntu) = xorg (Ubuntu)
** Changed in: xorg (Ubuntu)
Status: New = Incomplete
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It's not possible to disable the ATI chip in the BIOS as far as I can
tell.
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Title:
Display resolution keeps switching with external monitor
Further notes - this laptop is listed as Certified on the Ubuntu site
here - but it appears other users with the same hardware experience the
same issue:
References:
http://www.ubuntu.com/certification/hardware/201012-6933:201012-6938
http://ubuntuforums.org/showthread.php?p=11552309#post11552309
Tagging suggested package
** Package changed: ubuntu = libdrm (Ubuntu)
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Title:
Display resolution keeps switching with external monitor
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