bugzilla.mozilla.org will be intermittently unavailable on Saturday, March 24th from 16:00 until 20:00 UTC.

Alt-Tab and mouse movement 'slow'



15 years ago
14 years ago


(Reporter: Olaf, Assigned: asa)


Windows 2000

Firefox Tracking Flags

(Not tracked)




15 years ago
User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.3b) Gecko/20030210
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.3b) Gecko/20030210

when pressing Alt-Tab and/or moving the (USB-) mouse, the system sometimes feels
as if it was under high CPU load (which is not the case): the mouse cursor hangs
while moving it. I know this behaviour from 1.2.1 and 1.3b, but not from 1.3a.

Reproducible: Always

Steps to Reproduce:
1.load *this* page
2.load e.g. www.google.de
3.move the mouse while pressing Alt-Tab
2.load a page which needs a long time to load
3.move the mouse

Comment 1

15 years ago
1.3 final on Linux does not behave like this, 1.3 final on Win2K does

Comment 2

15 years ago
I found the solution. Fasten your seat belts. ;-)

My PC's power supply is too weak, and that made Mozilla slow. Only Mozilla, not
IE, not Winamp, no other program. No joke. I changed the graphics card from NV
TNT to MGA G100 (which consumes less power), I wanted to check what lets my PC
freeze occasionally since I changed the motherboard last week. Result: Mozilla
1.3 works fine, no mouse movement or Alt-Tabbing lags, and the PC is stable
since then... before the board change, the problem was there also, but with the
old board the PC was stable.

I can only guess that Linux configures the machine for less power consumption
than Windows, so the problem did not occur there.

It *could* be a graphics driver issue of course since I used the NV in the old
board also. I will check 1.3/Win32 at work tomorrow (graphics card is ATI
128CF), but I guess it will work fine there. If it works, I could install my NV
card there to see if the problem is related to the NVidia driver; when I see the
problem there also, I'll reopen this bug with a summary "Mozilla slow on NVidia
graphics cards" or something similar.
Last Resolved: 15 years ago
Resolution: --- → INVALID
Product: Browser → Seamonkey
You need to log in before you can comment on or make changes to this bug.