(Ubuntu Hardy, Xorg, Firefox) xorg using CPU heavily while visiting blogger.com with Firefox

... a sane amount of applications (3 or 4 open windows).

(Btw I typed Ctrl-V in an unrelated window that was "always on top", strangely causing this bug report to be sent before I had it ready.)

Sorry, totally wrong description.

I just now observed that this CPU spike only happens when I have https://www.blogger.com/start (the German version) open in Firefox (2.0.0.10). I guess it's a Firefox <-> Xorg (<-> Compiz) problem. As I only opened this page after upgrading Compiz, this problem is most likely NOT related to Compiz at all.

Thank you for your bug report.
Can you please give more information? For example: does this happen only when FireFox is started? What does the command `top` say?

Thanks for your quick response.

For this run here, I only had Gnome + Terminal (bash+top only) + Firefox (blogger only) running.

At first, on loading the page, firefox-bin went to about 50%, then this:

  PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
 8691 root 20 0 70908 14m 6932 R 78.8 3.8 0:11.12 Xorg
 9034 fr 20 0 174m 47m 23m S 7.6 12.6 0:08.12 firefox-bin

Then Xorg started going from about 50% to about 90% while firefox-bin remained constant:

  PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
 8691 root 20 0 71644 14m 7184 R 89.8 3.9 0:37.35 Xorg
 9034 fr 20 0 175m 48m 23m S 8.0 12.8 0:12.59 firefox-bin

This is with https://www.blogger.com/start on the visible tab. As soon as I open another tab in Firefox, e.g. by typing Ctrl-T to open a new tab, the CPU is immediately freed from the heavy Xorg load and I can work normally:

  PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
 9034 fr 20 0 176m 49m 23m S 8.0 13.1 0:35.62 firefox-bin
 8691 root 20 0 71900 15m 7352 S 4.0 4.0 1:42.45 Xorg

Sorry for the mess, here we go again:

Thanks for your quick response.

For this run here, I only had Gnome + Terminal (bash+top only) + Firefox (blogger only) running.

At first, on loading the page, firefox-bin went to about 50%, then this:

··PID·USER······PR··NI··VIRT··RES··SHR·S·%CPU·%MEM····TIME+··COMMAND
·8691·root······20···0·70908··14m·6932·R·78.8··3.8···0:11.12·Xorg
·9034·fr········20···0··174m··47m··23m·S··7.6·12.6···0:08.12·firefox-bin

Then Xorg started going from about 50% to about 90% while firefox-bin remained constant:

··PID·USER······PR··NI··VIRT··RES··SHR·S·%CPU·%MEM····TIME+··COMMAND
·8691·root······20···0·71644··14m·7184·R·89.8··3.9···0:37.35·Xorg
·9034·fr········20···0··175m··48m··23m·S··8.0·12.8···0:12.59·firefox-bin

This is with https://www.blogger.com/start on the visible tab. As soon as I open another tab in Firefox, e.g. by typing Ctrl-T to open a new tab, the CPU is immediately freed from the heavy Xorg load and I can work normally:

··PID·USER······PR··NI··VIRT··RES··SHR·S·%CPU·%MEM····TIME+··COMMAND
·9034·fr········20···0··176m··49m··23m·S··8.0·13.1···0:35.62·firefox-bin
·8691·root······20···0·71900··15m·7352·S··4.0··4.0···1:42.45·Xorg

And yes, this CPU usage today only happened with that website open.

Thank you.
Can you tell me also which OS are you using?

Sorry, I didn't read the bug summary :)

The original comment says this happens without Compiz.

On Tue, Jan 08, 2008 at 10:46:12PM -0000, Travis Watkins wrote:
> The original comment says this happens without Compiz.
>
> ** Changed in: firefox (Ubuntu)
> Sourcepackagename: compiz => firefox
>

try to start firefox from the command line without pango:

export MOZ_DISABLE_PANGO=1
firefox

does it improve the performance for you?

 status incomplete

 - Alexander

On Tue, Jan 08, 2008 at 10:46:12PM -0000, Travis Watkins wrote:
> The original comment says this happens without Compiz.
>
> ** Changed in: firefox (Ubuntu)
> Sourcepackagename: compiz => firefox
>

 affects ubuntu/firefox
 status incomplete

 - Alexander

I have this too with this website: www.xwiki.org

It seems "boxes" slowing down the whole thing. I can see that in gmail while composing a new email (and only then) too.

NVIDIA 8400, 169.07
2GB RAM
Core 2 Duo 2 GHZ

In response to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/180055/comments/10

fr@fr-laptop:~$ export MOZ_DISABLE_PANGO=1
fr@fr-laptop:~$ firefox

No change at all. I'm writing in that firefox process now. Having Blogger open in the current tab keeps Xorg CPU usage high as documented, even when I have Firefox minimized.

The xwiki.org page does cause Xorg CPU usage to go as high as Blogger during loading stage or when changing window size, but it is tame when kept minimized and/or its size unchanged.

I suspect some JavaScript code might cause this, but that's my uninformed opinion (after all, it's Xorg using CPU) and to be taken with a (few) grain(s) of salt.

I have the same issue on my laptop with both radeonhd and fglrx so it's not driver related.

It seems to be related to pango maybe ?

When opening for example gnome-system-monitor, do you have the same issue ? (I do)

I can confirm this behaviour on Hardy A6 w/ Ubuntu 2.6.24-12.22-generic and xorg 7.3+10ubuntu7
It doesn't appear to be so much caused by Firefox, rather applications that have animation (Banner and ticker on the Blogger page, as well as the resource page In System Monitor). This behaviour occurs with and without compiz running.

Although Jonathan reports the problem with an ATI card, I'm using nvidia-glx-new 169.12+2.6.24.11-12.31

On Fri, Apr 25, 2008 at 08:04:28PM -0000, Andrea Corbellini wrote:
> ** Changed in: firefox (Ubuntu)
> Status: Incomplete => Confirmed
>
> ** Changed in: firefox
> Status: Incomplete => Confirmed
>

 affects ubuntu/firefox
 status wontfix

firefox 2 wont receive any non-critical fixes anymore. if you still
have this issue, please add xulrunner-1.9 to this bug.

 - Alexander

Hi,

Check if you have a Zoom [Ctrl + Mouse wheel] on the Website.