Hi,

Some months ago I installed a FreeBSD-current system on my desktop computer. I use the 
KDE
desktop environment and I compiled really everything from ports. I periodically 
maintain it so my
system is up-to-date. I have been experiencing a problem with FreeBSD-current kernel 
all the time.
Some months ago I tried to compile a custom kernel based on GENERIC commenting out the 
not
necessary hardwares from my config, like RAID and most of NICs, etc. (I think it is a 
general thing
when customizing). Although I haven't tested it too much the kernel booted properly 
and everything
worked good in console. Trying to start KDE caused system crash (I guess in kernel 
level). I have
spent long days to find the reason trying almost all combination of kernel config 
settings without luck.
Ok, but GENERIC is worked with some custom lines added to it (but I couldn't remove 
anything
except debugging). Since 25th of September something changed in the current kernel 
source tree
because I am not able to compile any kernel, even GENERIC, with which KDE would start 
without
freezing the whole machine partly or completely. Unfortunately I did not preserve any 
earlier source
tree version, I just upgraded it with cvsup before the compilations. Now I use a newer 
base system
than the kernel, which results in an unstable operation (it is normal I guess), 
because I only preserved
the lastest goog-working /boot/kernel binaries I compiled before.

"KDE freezing" in detail
----------------------------------
System: FreeBSD 5.1-CURRENT i386

Relevant hardware config:
Mainboard  : ASUS P4S533-E (SIS645DX north, SIS962/L south bridges)
Memory     : PC2700 512MB DDR RAM (memtest86 tested)
VGA card   : ATI RADEON 9000 PRO

Very recent FreeBSD-current GENERIC kernel (was compiled exaclty as described in the 
handbook)
completely freezes some seconds later after starting KDE. Input peripherials/ACPI 
button become unusable
and the machine does not respond to ICMP on LAN so it completely hangs. It is not 
thought a hardware failure
because earlier kernel with the same config (synced with cvsup on 25th Sept. 2003) 
works very good. KDE
and XFree86 were compiled from the lastest ports so they are up-to-date. Logs does not 
show any usable
information related to this freezing so I think there is no point to attach any of 
them here (XFree86 just stops
logging before some radeondrm messages would be logged in normal case). I guess so it 
is closely an ATI-driver
related problem because when I tested the same base system/kernel with an S3Trio VGA 
card that worked
and the ATI did not. This ATI is a common card (with dual head+tv output) and not a 
cheap one at all (I currently
use it on other OS-es on the same machine without experiencing any problems).

Since I have been experiencing these problems I sync my source tree more times a week 
and I'm trying to compile
a working kernel without luck.

Note: If I switch back to console immediately after X server started and before KDE 
begins to initialize then KDE
starts up properly. When I go back to X again I see the desktop as everything would be 
right. Some seconds later
the same freezing takes place. First the keyboard blocks, then the mouse starts 
clogging and the whole machine
totally hangs.


I would appreciate any help in connection with this problem's solution.

Thanks in advance,
Tamás R.
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