Screen flickers in UBUNTU 11.04

Did you upgrade from 10.04 to 11.04 directly? Or did you clean install?

I installed it. I removed 10.04 and installed, when I did it first time by having online for any updates such as flash or anything, it showed some bug in VAR folder, specifying syslog to attach the bug report. and partman file too. But screen started fickering and there was no folder as partman in VAR /log/ ... And I wasn't able to attach syslog file due to flickering even in classic desktop too. And during installation and keeping online it gave error as "Installer Crashed" and those two files syslog and partman to attach and report to UBUNTU site. However I couldn't do it due to consistent flickering...Help...

Did you MD5 test the ISO you downloaded?
If you used a CD/DVD did you make the CD test itself once booted to?

8b1085bed498b82ef1485ef19074c281 ubuntu-11.04-desktop-i386.iso
I did MD5 test for my ISO image, It gave the above hash script. And in UBUNTU HASHES it says

 8b1085bed498b82ef1485ef19074c281 ubuntu-11.04-desktop-i386.iso .. Means it matches.. I got iso and made a cd without testing anything MD5 initially.. And tried to install without having internet connection. It didn't worked with same screen flickering. and later being online. However it took time and showed those installer crash report with bugs in two folders to be attached to this site and report. BUt unable to find partman file. And even in Desktop theme too flickering was their, but not so much as it was natty. But I wasn't able to work, that I can assure, Or else I would have attached the syslog file in here so that it would have helped you... Please more suggestions required..

Can you give the output of:

sudo lshw -C display

Thanks

I'm also seeing flickering with Ubuntu Classic desktop on an older machine with an Intel 82865G rev 02 graphics controller. Using Ubuntu Classic with no effects seems to eliminate the flickering. There are still other graphics issues (top and bottom panels have some drawing problems), but at least the system is somewhat usable.

sudo lshw -C display command gave me this

*-display
       description: VGA compatible controller
       product: 82865G Integrated Graphics Controller
       vendor: Intel Corporation
       physical id: 2
       bus info: pci@0000:00:02.0
       version: 02
       width: 32 bits
       clock: 33MHz
       capabilities: pm bus_master cap_list rom
       configuration: driver=i915 latency=0
       resources: irq:16 memory:f0000000-f7ffffff(prefetchable) memory:e8000000-e807ffff ioport:1800(size=8)

I experience the same problem after upgrading from 10.10 to 11.04 - clean installed. I also noticed running Ubuntu from CD gave the same problem.

any help guys please

Have the same problem. LCD panel on notebook starts flickering after about 30 seconds of not touching any key. The screen light indicator goes up and down with the flickering. When touching the mouse or any key, it finally stops.

Used 10.10 with no problem, had an upgrade (not clean install). Result of sudo lshw -C display:
  *-display
       description: VGA compatible controller
       product: RS690M [Radeon X1200 Series]
       vendor: ATI Technologies Inc
       physical id: 5
       bus info: pci@0000:01:05.0
       version: 00
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi vga_controller bus_master cap_list rom
       configuration: driver=radeon latency=64
       resources: irq:18 memory:d0000000-dfffffff memory:fdef0000-fdefffff ioport:c000(size=256) memory:fdd00000-fddfffff

Please help, it is ANNOYING.

There must be something to do with the power saving.
If I use the laptop on batteries and wait 30 seconds when the screen starts to flicker the external USB mouse and the internal touchpad stops working as well!!!
I can only stop it if I switch the touchpad on and off by the harware key (Fn+F3 on my machine).

I tried many things.
Finally it came out that this is a problem of the gnome-power-manager package.
Solution 1:
- untick the box of "screen dimming when idle"
Solution 2:
- remove the package with synaptic and wait for the upgrade ... :)

I was having the same problem with my six year old HP Pavilion. Update Manager just ran and installed a bunch of new stuff. I re-booted and all appears to be working now using the Classic Ubuntu No Effects settings. Thanks!

If you are logged into your computer:
LOG OUT from it and click on Ubuntu classic version( with no effects)* on the bottom right side of the log-in screen.
I hope it helps...
keep updating your system.

If you are logged into your computer:
LOG OUT from it and click on Ubuntu classic version( with no effects)* on the bottom right side of the log-in screen.
I hope it helps...
keep updating your system.

I have mentioned in previous "Rohith Kumar said on 2011-05-01:"

And I wasn't able to attach syslog file due to flickering even in "classic desktop too".

Means I have logged out, and I know where is the classic version, and i have tried it too. It didn't worked

There must be a problem with the gnome-power-manager package. When during manual brightness settings you reach to lower most or top most values the screen will flicker. There must be some calculation error in the display brightness file.
If you remove the gnome-power-manager package the flicker stops. Still you can change the brightness yourself, but will loose the laptop battery feature and othet power saving settings...
It is sure, that the gnome-power-manager is the problematic package, since if you use KDE you do not have this problem.

I really don't know where is the gnome power manager. and sorry that nothing after what you said, since if i see it, i can get to know what you say next..

Hi, It is in /usr/bin. Find as gnome-power-manager, but it is a binary file, and there is nothing to do with it.
Only this:
sudo apt-get remove gnome-power-manager --purge

I too have the same issue. The screen flickering usaully happens when the netbook (asus eee pc 1005px) is turned on. Or when a application is launched. The issue was there even in ubuntu 10.10. Now I am running ubuntu 11.04. When the flickering happens the screen goes black for few miliseconds and then normal, and it repeats. Here is the outpu of "lshw -C display"

 *-display:0
       description: VGA compatible controller
       product: N10 Family Integrated Graphics Controller
       vendor: Intel Corporation
       physical id: 2
       bus info: pci@0000:00:02.0
       version: 00
       width: 32 bits
       clock: 33MHz
       capabilities: msi pm vga_controller bus_master cap_list rom
       configuration: driver=i915 latency=0
       resources: irq:45 memory:f7e00000-f7e7ffff ioport:dc00(size=8) memory:d0000000-dfffffff memory:f7d00000-f7dfffff
  *-display:1 UNCLAIMED
       description: Display controller
       product: N10 Family Integrated Graphics Controller
       vendor: Intel Corporation
       physical id: 2.1
       bus info: pci@0000:00:02.1
       version: 00
       width: 32 bits
       clock: 33MHz
       capabilities: pm bus_master cap_list
       configuration: latency=0
       resources: memory:f7e80000-f7efffff

I am using the gnome classic desktop, not unity.

This problem exists in Kubuntu 11.04

I have the same problem on my MSI notebook

I have the same problem on my MSI notebook

Same problem on a Belinea o.book 4.

Same problem on a Belinea o.book 4.

Please try to activate the natty-proposed repository and update the system

I am new to Ubuntu...a refugee from Windows 7....and, yes, my screen flickers as well. But I am on a desktop...Cyberpower AMD 64, 2006 vintage. I hope that someone figures out the fix. The flickers are hard to tolerate.
Pete

I have ubuntu 11.04. And its fully updated. On the other bug thread linked with this one, it was mentioned that a fix was released, but the bug remians as it is.

I have a Toshiba and installed today 14.04 LTS on an AMD 64 bit laptop with a Gallium .4 on ATI RS 690 display. The laptop screen flickers but if I put on an external (mirrored) display, the external display works fine. There is obviously something wrong here, and I am not a Linux expert... What to do?

{experimental attempt to replay to launch pad posted questions via emai}

From my experience, there are serious issues with AMD based systems,
both audio and video. My current solution is to stick with Intel for
production environments and AMD, on the test-bench.
I am trying to resolve these issue, but it's complex work. I also need
more used/refurbished AMD systems to test-bench.
The fundamental issues seem to be drivers that call AMD system devices,
as clones of the Intel. But, as stated I need more systems (I'm now
using laptops) to test, and debug various configurations.

Cyborg Alpha
(the cybernetic existence of Dr. Daniel Carras)
http://youtube.com/CyborgAlphaV1

On 11/02/2014 07:46 PM, Charles R Chernack wrote:
> Question #155244 on xserver-xorg-video-intel in Ubuntu changed:
> https://answers.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+question/155244
>
> Charles R Chernack posted a new comment:
> I have a Toshiba and installed today 14.04 LTS on an AMD 64 bit laptop
> with a Gallium .4 on ATI RS 690 display. The laptop screen flickers but
> if I put on an external (mirrored) display, the external display works
> fine. There is obviously something wrong here, and I am not a Linux
> expert... What to do?
>