Dell e6420 - monitor frequency issue

[Martin Pichna]

Hello guys,

colleague and I have Dell e6420 (identical HW) and we're both running UBUNTU 12.04. We've noticed we can't focus on the monitor due to the noticeable blinking (seems like the refresh frequency is not 60 Hz - you can see in xrandr output that it's set though). This is very evident when the background is gray/black (basically happens on darker colours - or it's more evident). I know this is very difficult to describe, but colleague and I think that this could be the driver that runs our graphical card...As you can notice from the outputs this laptop has 2nd GC - NVIDIA, however I read that it's not recommended to use NVIDIA on UBUNTU (not so well supported). Do you think you could help us to fix this issue?

mpichna@mpichna-ntb:~/data$ lsb_release -rd
Description: Ubuntu 12.04.1 LTS
Release: 12.04

All other system info - see attached.

thanks, martin

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1088854/+editstatus and add the package name in the text box next to the word Package.

[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]

[Martin Pichna (mpichna)]

Hello,

sorry but I don't know what package name is responsible for my issue. My graphical card is Intel SandyBridge, so I guess it's the driver.

regards, martin

[Martin Pichna (mpichna)]

Hello,

just wanted to add - I have tried to use the NVIDIA graphical card only w/ default driver it found (Gallium) - I have an option in DELL BIOS to disable/enable it. However the symptoms (blinking) persist even on the different graphical card & driver. So I guess this is related to Xorg and not to the i915 driver (on my Intel graphics).

I hope that this helps a little bit.

regards, martin

[penalvch (penalvch)]

Martin Pichna, 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/daily-live/current/ .

If it remains an issue, could you please run the following command in the development release from a Terminal (Applications->Accessories->Terminal), as it will automatically gather and attach updated debug information to this report:

apport-collect -p xorg <replace-with-bug-number>

Thank you for your understanding.

Helpful bug reporting tips:
https://wiki.ubuntu.com/ReportingBugs

[Launchpad Janitor (janitor)]

[Expired for xorg (Ubuntu) because there has been no activity for 60 days.]