User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:188.8.131.52) Gecko/20061201 Firefox/184.108.40.206 Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:220.127.116.11) Gecko/20061201 Firefox/18.104.22.168 I have set up two test pages, one page with gif background images and one just like it using png-images: http://web.telia.com/~u97015790/testcase/test_gif.html http://web.telia.com/~u97015790/testcase/test_png.html The gif page can get very sluggish to scroll, causing 100% CPU usage (i have a AMD 64 +3000). On the page using png background images this does not happen. Reproducible: Always Steps to Reproduce: 1. Open the page containing gif backgrounds. 2. Move around another window on top of the browser, could be the "Page info" properties window or a terminal, whatever. 3. Now try to scroll the page. Actual Results: The page scroll becomes very jerky and sluggish, when scrolling with the mouse wheel the page continues to scroll for quite some time, until the CPU comes off 100% load. Expected Results: Expected results would be the same as the testpage with png background images. Normal scrolling and normal CPU load. This problem came up on a fairly large swedish community site (www.fotosidan.se), as of today the problem is still there, but now when i discovered that the problem goes away by converting backgrund images from gif to png, i expect them to change the site. So i made the test pages for you all to be able to reproduce the problem. On fotosidan.se the problem is much more severe than my testpages, since that site is a quite heavy site with a lots of graphics like photos (it is a photo community), and complex menus and so on. In their forum a lot of Mozilla, Firefox and Seamonkey users complained about jerky scrolling, all of those users was on the Linux platform, especially Ubuntu users seemed to have the worst problems (could be a heavy desktop). So this bug seem to affect a lot of different versions and setups. But Mozilla based browsers on the windows platform did not report any problems.
The second step to reproduce is not allways necessary. Sometimes the bad scrolling is there from start, it seem like the odds for good scrolling at first visit is better with a newly restarted browser.
it sounds like you're seeing bug 255703. What video card / driver are you using?
I have nvidia (the nv X-driver), and i do not experience problems with the testcases in bug 255703.
I can confirm this for a very similar machine. CPU load increases from under 5% to about 50%, which is quite unusual on this box. To give you a feeling, that's in the same order of magnitude like google earth in flight simulator mode, in fullscreen 1600x1200, flying highspeed through the Grand Canyon. And also confirmed, the 255703 example works completely ok here. AMD Athlon 64 X2 (2x2Ghz), 3G, nVidia GeForce 7300 GT. OS: # Kernel: Linux 2.6.24-rc8-amd64 (custom) # Debian GNU/Linux lenny/sid # Installed: libc6 2.7-6 libc6-dev 2.7-6 libc6-i386 2.7-6 libglib-perl 1:1.161-1 libglib1.2ldbl 1.2.10-19 libglib2.0-0 2.14.5-2 iceweasel 22.214.171.124-1 nvidia-glx 169.07-2 nvidia-glx-ia32 169.07-2 nvidia-kernel-2.6.22-2-amd64 100.14.19-1+2.6.22-4 nvidia-kernel-2.6.22-3-amd64 100.14.19-1+2.6.22-5 nvidia-kernel-2.6.24-rc8-amd64 169.07-2+2.6.24~rc8-1~experimental.2~snapshot.10165 nvidia-kernel-common 20051028+1-0.1 nvidia-kernel-source 169.07-2 nvidia-settings 1.0+20070502-1 x11-xserver-utils 7.3+2 xserver-xorg 1:7.3+10 xserver-xorg-core 2:1.4.1~git20080118-1 xutils 1:7.3+10 xutils-dev 1:7.2.ds2-1 libx11-6 2:1.0.3-7 libx11-data 2:1.0.3-7 libjpeg-progs 6b-14 libjpeg62 6b-14 libpng12-0 1.2.15~beta5-3 libtiff4 3.8.2-7 libfreetype6 2.3.5-1+b1 libxrender1 1:0.9.4-1 libgtk2-perl 1:1.140-1 libgtk2.0-0 2.12.5-2 libgtk2.0-bin 2.12.5-2 libgtk2.0-common 2.12.5-2 libgtkhtml2-0 2.11.1-1 libgtkhtml3.8-15 3.12.3-2
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9pre) Gecko/2008042306 SeaMonkey/2.0a1pre WFM (on single-CPU AMD Duron 1.2 GHz, openSUSE Linux 10.3, kernel 126.96.36.199-0.1-default, VGA card SIS 660, Xorg server "sis"). No significant difference in scrolling. (Both tescases, GIF and PNG, are somewhat more jerky than this Bugzilla page, both about equally, but nothing unbearable.) CPU use increase, if any, is hard to spot. Note: My mouse has no wheel; using the scrollbar moves the other window to behind the browser window. Magnus, Micha, are you still seeing this bug, and on which version(s) of SeaMonkey?
When i reported this i had Seamonkey 1.0.5 (spoofed to Firefox), now i have: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:188.8.131.52) Gecko/20080313 SeaMonkey/1.1.9 No difference. At first visit to the "gif page" it can go smoth, not allways. But as soon as i do something (move another window over) it gets extremly sluggish. How sluggish? If i scroll with the wheel down-up-down-up (about 6 click each) then the page do not stop moving (with 100% CPU AMD 64 +3000) for over 50 seconds! The "png page" is normal whatever i do.
Assignee: general → nobody
Component: General → Layout
Product: SeaMonkey → Core
QA Contact: general → layout
Version: SeaMonkey 1.1 Branch → 1.8 Branch
testcase is gone
Status: UNCONFIRMED → RESOLVED
Last Resolved: 9 years ago
Resolution: --- → INCOMPLETE
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