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I have been looking high and low for this issue to have been resolved, but no one else seems to have it. I am using Slack 10 with the default kernel and am trying to upgrade to 2.6.7 but I keep running into a problem.
Every time a boot a kernel other than the default (this includes 2.4 kernels) the system is around 5 times slower! The bootup takes longer, my programs take many times longer to load, and my x server (x.org) is using 3 times the cpu than it should. De-optimizing from athlon to i386 with generic kernel optimizations helps a little.
This happened with Slack 9.1 with the xfree86 server as well.
Does anyone has any ideas on what could be causing this?
X.org TOP readings:
Default kernel : 0.3 - 0.7 cpu
Any new kernel : 1.5 - 3.8 cpu
Default kernel : 290 - 360 fps
Any new kernel : 50 - 90 fps (no hardware acceleration or DRM on either)
Soyo Via KT400 dragon ultra (onboard sound and 10/100 ethernet)
512M pc2700 ddr ram
AMD athlon 2500+
Excalibur Radean 9600 Pro (the Powered by ATi type)
Unneeded modules? I thought that as long as they are not loaded they don't cause slowdown. I have run the new kernel without any modules loaded (but still compiled and readied to be modprobed) and it doesn't help.
By unneeded modules I meen any hardware drivers that come with the kernel. I.E. do not install Nvidia Driver since don't have an Nvidia card. Even thou the drivers are not in use by the system the kernel is much larger with them in there.
As far as graphics hardware and buses go, its pretty minimal (im wondering if i should use the kernels agpgart for the Radeon with the ATi driver) but I skimmed over the filesystems section, a lot of unnecesary stuff is compiled in there. I don't think thats it though.