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hmarr
August 23rd, 2010, 03:08 PM
Hi,

I've installed Ubuntu 10.04 on a new Dell Latitude E4310 - everything works fine except the laptop screen. It intermittently appears to switch off for a split second (not entirely sure if it's just the backlight or not...)

I saw a post about a similar issue (http://ubuntuforums.org/showthread.php?t=1505712) that suggested installing the new drm-intel kernel, but that has not solved the problem. I'm running out of ideas so I'd hugely appreciate some input!



~$ glxinfo | grep -i direct
direct rendering: Yes
~$ lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated Graphics Controller (rev 02)


Let me know if any other info would help.

Many thanks in advance

EDIT: I forgot to mention, if I plug in an external monitor, it is only the laptop monitor that flashes. This behaviour does not seem to occur under Windows.
EDIT2: Tried the powersave=0 fix that seems to work for similar problems, doesn't seem to have helped...

lpchouinard
September 4th, 2010, 08:25 PM
I have the exact same problem, but it's a new issue. It's either the upgrade to the A04 bios or some updates because Ive been running the same install for 3 months now and it just start happening.

hmarr could you tell what version of the bios are you using, also here's a glipse of my Xorg log file

(II) intel(0): EDID vendor "LGD", prod id 589
(II) intel(0): Printing DDC gathered Modelines:
(II) intel(0): Modeline "1366x768"x0.0 75.50 1366 1414 1446 1581 768 771 777 793 +hsync -vsync (47.8 kHz)
(II) intel(0): Modeline "1366x768"x0.0 50.30 1366 1414 1446 1576 768 771 777 793 +hsync -vsync (31.9 kHz)
(II) PM Event received: Capability Changed
I830PMEvent: Capability change
(II) intel(0): EDID vendor "LGD", prod id 589
(II) intel(0): Printing DDC gathered Modelines:
(II) intel(0): Modeline "1366x768"x0.0 75.50 1366 1414 1446 1581 768 771 777 793 +hsync -vsync (47.8 kHz)
(II) intel(0): Modeline "1366x768"x0.0 50.30 1366 1414 1446 1576 768 771 777 793 +hsync -vsync (31.9 kHz)
(II) intel(0): EDID vendor "LGD", prod id 589
(II) intel(0): Printing DDC gathered Modelines:
(II) intel(0): Modeline "1366x768"x0.0 75.50 1366 1414 1446 1581 768 771 777 793 +hsync -vsync (47.8 kHz)
(II) intel(0): Modeline "1366x768"x0.0 50.30 1366 1414 1446 1576 768 771 777 793 +hsync -vsync (31.9 kHz)
(II) PM Event received: Capability Changed
I830PMEvent: Capability change
(II) intel(0): EDID vendor "LGD", prod id 589
(II) intel(0): Printing DDC gathered Modelines:
(II) intel(0): Modeline "1366x768"x0.0 75.50 1366 1414 1446 1581 768 771 777 793 +hsync -vsync (47.8 kHz)
(II) intel(0): Modeline "1366x768"x0.0 50.30 1366 1414 1446 1576 768 771 777 793 +hsync -vsync (31.9 kHz)

EDIT: The flickering doesn't happen if i use the dock staion and an external monitor(DVI)

hmarr
September 7th, 2010, 07:25 PM
I'm using the A03 BIOS. Still haven't found a fix for it.

Got in touch with Dell about the issue - spent over 6 hours on the phone to various customer support people and was finally told by the last person that as the laptop was bought through a business they have no interest in the issue (or any other issues I ever encounter).

Have you made any progress?

AlexZaim
September 7th, 2010, 07:40 PM
there is a ppa called best-intel (https://launchpad.net/~guido-iodice/+archive/best-intel)
Add it. Install la latest kernel from it and upgrade the drivers (or just do the update). It may fix something... These are thelatest developements of gpu drivers and kernels. Post back results.

hmarr
September 7th, 2010, 10:42 PM
Is there a way of getting that PPA working on Maverick? I'm trying 10.10 beta now in the hope that it'll fixed sooner here than Lucid.

Cheers

hmarr
September 8th, 2010, 01:26 AM
Also, I'm not sure if this is X-related - I tried Arch briefly and encountered the problem even before I started X.

Cheers,
Harry

AlexZaim
September 8th, 2010, 01:14 PM
yes, it should work with 10.10. But 10.10 has a quite good kernel... i'm surprized it didn't worked. You can still try the ppa though.
Add this line to your repositiories
deb http://ppa.launchpad.net/guido-iodice/best-intel/ubuntu lucid main

In case you don't know, search the net on how to do that.

then do an update.

mijnomrah
September 8th, 2010, 03:21 PM
I was having the exact same problem and with my latitude E4310. I upgraded to the A04 bios and so far (less than a day) the problem seems to be fixed. Upgrading the bios without windows turned out to be much more of a pain than I expected, i ended up reinstalling windows just to upgrade the bios.

hmarr
September 9th, 2010, 11:18 AM
Trying the new kernel and BIOS now - seems slightly better so far but I'm pretty sure I've still seen it flicker a couple of times...

mijnomrah: How's the new BIOS going for you?

scottuss
September 9th, 2010, 11:33 AM
You are absolutely sure the problem doesn't occur outside of an OS (BIOS) or in Windows?

hmarr
September 9th, 2010, 12:25 PM
Pretty sure - I've tried Windows for as long as I could bare and didn't notice any flickering. The new BIOS seems to have helped a bit - the flickering seems to start when I play around with external monitors - this can also freeze the laptop.

Edit: the flickering has definitely reappeared - regardless of whether an external monitor is present..

mijnomrah
September 9th, 2010, 02:36 PM
Ok, still having the flicker with the 0A4 bios. I also upgraded the kernel to 2.6.35 to solve the problem of the screen staying black when you shut/open the laptop which did fix that problem. The flickering doesn't seem as bad but it's still pretty annoying.

I have not seen the screen flicker outside of linux, both windows and the bois screen seem fine.

Laborifer
September 15th, 2010, 05:02 PM
Hi,

I have the same problem that you describe on this thread when i'm running on latitude E4310 an Ubuntu 10.04 with 2.6.32.24 kernel the laptop screen flickering off intermittently.

but when i use 2.6.32.21 or 2.6.32 22 kernel, i don't have any problem...

Cheers

AlexZaim
September 16th, 2010, 09:00 PM
try going to

sudo gedit /etc/default/grub
and edit this line:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
into this

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nomodeset acpi_backlight=vendor"
save it and reboot.

If the above will not work i just want to say that:
this bug is being worked on , acording to launchpad (https://bugs.launchpad.net/ubuntu/+source/linux/+bug/543045)'s bug tracker.

the big e
September 17th, 2010, 03:57 AM
I have a similar problem. Thinkpad T500 dual boot ubuntu/vista. I get one flicker every several minutes or so in Ubuntu but not when I am running Windows.

mijnomrah
September 17th, 2010, 02:24 PM
try going to

sudo gedit /etc/default/grub and edit this line:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"into this

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nomodeset acpi_backlight=vendor"save it and reboot.

If the above will not work i just want to say that:
this bug is being worked on , acording to launchpad (https://bugs.launchpad.net/ubuntu/+source/linux/+bug/543045)'s bug tracker.

I will try this and report back. None of the other fixes have worked for me so here's hoping.

AlexZaim
September 18th, 2010, 09:28 AM
I will try this and report back. None of the other fixes have worked for me so here's hoping.

OH! I forgot to add 1 more line at the end


sudo update-grub

execute it after you save the changes to the file. Then reboot.

hmarr
September 19th, 2010, 06:44 PM
I'll give this a go tomorrow when I'm back in the office and report back.

Cheers

mijnomrah
September 20th, 2010, 02:31 PM
I will try this and report back. None of the other fixes have worked for me so here's hoping.

Appears to cause major problems, the the ubuntu splash screen gets garbled and then freezes. This is with kernel 2.6.32-24.

AlexZaim
September 21st, 2010, 09:26 AM
ok. you can change the line back to it's default and do update-grub.
Let's hope that in the final 10.10 this will be fixed.

mijnomrah
September 27th, 2010, 03:04 PM
Just thought I'd give an update. I still have the flicker with ubuntu 10.10. I also tried Fedora 13 and OpenSuse and have the exact same problem.

mijnomrah
September 28th, 2010, 03:55 PM
Hi,

I have the same problem that you describe on this thread when i'm running on latitude E4310 an Ubuntu 10.04 with 2.6.32.24 kernel the laptop screen flickering off intermittently.

but when i use 2.6.32.21 or 2.6.32 22 kernel, i don't have any problem...

Cheers

I have confirmed this too, both kernels 2.6.32.21 and 2.6.32.22 do not have the flickering issue. Both kernels will not wake from suspend either.

AlexZaim
September 30th, 2010, 09:45 AM
I have confirmed this too, both kernels 2.6.32.21 and 2.6.32.22 do not have the flickering issue. Both kernels will not wake from suspend either.

i've sent a bug report to kernel.org, but have no answers from them yet.

alexM11
October 4th, 2010, 01:09 PM
I guess I have the same problem with a DELL Latitude E4310 laptop. The screen is fine with windows7 but with ubuntu 10.04 I have this screen flickering. Note that with an external screen I don't have the problem.

Did you sort out this issue ?

solofs
October 14th, 2010, 01:17 PM
I have a DELL E4310 and I have found a work-around for this problem on ubuntu 10.10 (kernel 2.6.35-22-generic): I simply set the computer to standby mode and then wake it up.

After boot the flickering is unbearable (at least for me) but after having made a cycle of standby - wake up there are no more any flickers!

The computer is really nice running ubuntu 10.10, however there are still some problems remaining:

- If the screen is switched off by the power management the flickers restarts when it's turned on again.

- If I let the computer sleep for a longer time (>1 h) I cannot wake it up again.

- The touch pad still can't be configured... :(

I hope this helps!

Olof

xycmu
October 20th, 2010, 03:43 AM
I simply set the computer to standby mode and then wake it up.

After boot the flickering is unbearable (at least for me) but after having made a cycle of standby - wake up there are no more any flickers!

The computer is really nice running ubuntu 10.10, however there are still some problems remaining:

- If the screen is switched off by the power management the flickers restarts when it's turned on again.


I tried this and it worked for me as well. At least I can use the OS now using this work-around without having a seizure.

I also confirmed that after powering off the display via power management that the flickering resumes.

Note to all those who have asked: I never saw this happen within Windows or outside of the X11 server.

Fischmuetze
October 26th, 2010, 10:50 AM
Have the same problem since 10.04 kernel >22 and also in 10.10 ...

<22 no sound
>22 no stable screen
aaaaaaaaaaaarghhh

The screen flickers always... we have a lot of this Computers on our institute and are not able to supply it to the users... What painful ..
The screen flickers always... we have a lot of this Computers on our institute and are not able to supply it to the users... That's absolutely angrily .. Never had before such problems...

mpbio01
November 22nd, 2010, 07:22 AM
I've got the same issue with E4310 running Ubuntu 64 bit 10.10

learst
December 2nd, 2010, 05:57 PM
Hi,

I posted this in another similar thread, but thought I'd post here too:

I'm using a Dell Inspiron 1420 with nVidia GS8400 M.

Short history, I have been using Windows Vista Then once there was a problem where there was no display even though the monitor was lighted. This was April 2010 , and I was given a new motherboard

After that I did a clean format to use a dual-boot Windows/ Ubuntu 10.04. And I noticed the flickering started in Ubuntu. It was very brief and rare, but then it got more frequent. The flickering also occured when I use Windows. I contacted Dell technical support, and they thought it was a motherboard problem so I was given a new motherboard again (3 weeks ago).

With this new motherboard, I did a clean reinstall of Windows and Ubuntu 10.04. After a few days, the flickering started again and I can't get it to stop. Since some posters suggested updating to Ubuntu 10.10, I formatted my drive to reinstall Win/Ubuntu. I noticed the flickering persisted throughout the installation of Windows and Ubuntu, and even while starting up. I really doubt this is a hardware problem with the motherboard as I've just got a new one.

Right now the flickering occurs every randomly around every 10 seconds, while booting up, running Windows and Ubuntu 10.10. I have no idea how to solve this, other than call Dell technical support again. They'll probably give me a weird look as if this will be the third time I'm changing my motherboard this year!

xycmu
December 2nd, 2010, 06:13 PM
The flickering also occured when I use Windows.

I'm quite certain that your particular issue is not related to the issue described above. The issue that had been described only affects Linux, not Windows at all.

It sounds like the issue that you describe is hardware related. Perhaps your video controller is not part of your motherboard and are therefore not actually replacing a potentially defective part. Perhaps try replacing the actual video controller, not just the motherboard - and secondly perhaps your LCD backlight is defective?

Either way, your issue is different and not something that pertains to Ubuntu or even Linux.

learst
December 3rd, 2010, 02:36 PM
Hi,

Just an update on something I found recently which said that my flickering screen could be due to hardware problem (Dell 1420 with nVidia) rather than anything to do with Ubuntu at all.

http://en.community.dell.com/dell-blogs/Direct2Dell/b/direct2dell/archive/2008/08/08/latest-on-the-nvidia-gpu-issue-for-dell-laptop-customers.aspx

xycmu
December 3rd, 2010, 03:27 PM
my flickering screen could be due to hardware problem (Dell 1420 with nVidia)

Quite possibly, but the issue in this thread specifically deals with the Intel HD integrated video controller, not nVidia. Your issue is something else entirely. I would tell you to create a new thread with your specific issue, but it's not appropriate for this Ubuntu forum.


~$ lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated Graphics Controller (rev 02)

AlexZaim
December 4th, 2010, 09:09 AM
Guys, i have a toshiba t135 and the problems that i encounter are:
1. Can't change screen brightness. (in 10.04 i had a workaround, doesn't work anymore in 10.10)
2. I get the flickering in games, but not on desktop.

I just wanted to share that with you.

Bartzy
December 10th, 2010, 01:41 PM
Just to let you know that on Debian Squeeze, Kernel 2.6.36-trunk-amd64, 64-bit.

It's SO annoying.. do you think it's Intel Drivers problem?

xycmu
January 22nd, 2011, 05:03 AM
I found this similar thread over at RedHat:
https://bugzilla.redhat.com/show_bug.cgi?id=580276

Seems to describe the same issue

Dean_A
January 26th, 2011, 02:41 PM
Hi All,

One thing I have realized is that if you boot into kernal 2.6.32-21 you don't have any screen issues, or touchpad issues. When I tried kernal 2.6.35-24 I had sceen issues and touchpad issues. Quick solution is to install "startupmanager" and select the right kernal to load on startup.

I am still having audio issues though.

Dean_A
January 29th, 2011, 02:59 AM
Another update, adjusting the settings on the boot screen works to a point. I cannot get the VGA out enabled. When I look at the refresh rate setting for the laptop display it is set to "0" instead of "60". Without the boot script tampered with I can get VGA working and it seems like monitor settings are all as they should be, but the laptop screen still blacks out. I have a conference coming up where I will require dual screens. If anyone else has some suggestions I would appreciate it.

trondhuso
October 25th, 2011, 10:01 PM
What you have to do to stop the flickering is to upgrade to any kernel above 2.6.36. I got in touch with some kernel guy on irc and he told me to get the 2.6.38-kernel, so I downloaded it and it works.

I fixed this a while back so I cannot remember where and how to do it, just to tell that get away from any 2.6.36 or which ever 10.04 comes with.
Or just upgrade to one of the later ubuntu distros that has any of the newer kernels.

I wanted to stick with the lts and so I did. alas they have not fixed the flickering in the kernel series that the lts is running... it seems...

amira-kitten
October 26th, 2011, 01:57 PM
Firstly, thanks for posting this. I had flickering problems on 11.04 and they got worse when I upgraded to 11.10 (therefore I'm a little confused about the whole thing about it working if you upgrade to a certain kernel because it didn't for me.)
Needless to say solving one problem has caused another. Changing grub has fixed my very irritating flickering issue but has now completely messed up the screen resolution in KDE and there are no options in the monitor/display setting to change res. I am going to look into sorting that later but I thought I'd pass it on in case it was of interest to anyone else. I have a screenshot if anyone wants to see but basically its set itself to 800x600 and now looks horrible.