X.org: high CPU load

Hi!

From time to time X does heavily load the CPU. I do have the problem on two very different machines (SuSE 9.3 desktop and gentoo notebook, both 2.6.11 plus distro patches). Below is strace X, strace -p does freeze the system (!). execve("-usr-X11R6-bin-X", "X", -* 81 vars *-) = 0 uname({sys="Linux", node="tcn", ...}) = 0 brk(0) = 0x8218000 access("-etc-ld.so.preload", ROK) = -1 ENOENT (No such file or directory) open("-etc-ld.so.cache", ORDONLY) = 3 fstat64(3, {stmode=SIFREG0644, stsize=163365, ...}) = 0 oldmmap(NULL, 163365, PROTREAD, MAPPRIVATE, 3, 0) = 0x40018000 close(3) = 0 open("-lib-libz.so.1", ORDONLY) = 3 read(3, "-177ELF-1-1-1-0-0-0-0-0-0-0-0-0-3-0-3-0-1-0-0-0-320-25"..., 512) = 512 fstat64(3, {stmode=SIFREG0755, stsize=64912, ...}) = 0 oldmmap(NULL, 66892, PROTREADPROTEXEC, MAPPRIVATEMAPDENYWRITE, 3, 0) = 0x40040000 madvise(0x40040000, 66892, MADVSEQUENTIAL0x1) = 0 oldmmap(0x40050000, 4096, PROTREADPROTWRITE, MAPPRIVATEMAPFIXED MAPDENYWRITE, 3, 0xf000) = 0x40050000 close(3) = 0 open("-lib-tls-libm.so.6", ORDONLY) = 3 read(3, "-177ELF-1-1-1-0-0-0-0-0-0-0-0-0-3-0-3-0-1-0-0-0P3-0-000"..., 512) = 512 fstat64(3, {stmode=SIFREG0755, stsize=151700, ...}) = 0 oldmmap(NULL, 4096, PROTREADPROTWRITE, MAPPRIVATEMAPANONYMOUS, -1, 0) = 0x40051000 oldmmap(NULL, 139424, PROTREADPROTEXEC, MAPPRIVATEMAPDENYWRITE, 3, 0) = 0x40052000 madvise(0x40052000, 139424, MADVSEQUENTIAL0x1) = 0 oldmmap(0x40073000, 8192, PROTREADPROTWRITE, MAPPRIVATEMAPFIXED MAPDENYWRITE, 3, 0x20000) = 0x40073000 close(3) = 0 open("-usr-lib-libusb-0.1.so.4", ORDONLY) = 3 read(3, "-177ELF-1-1-1-0-0-0-0-0-0-0-0-0-3-0-3-0-1-0-0-0-340-23"..., 512) = 512 fstat64(3, {stmode=SIFREG0755, stsize=63713, ...}) = 0 oldmmap(NULL, 32088, PROTREADPROTEXEC, MAPPRIVATEMAPDENYWRITE, 3, 0) = 0x40075000 madvise(0x40075000, 32088, MADVSEQUENTIAL0x1) = 0 oldmmap(0x4007b000, 8192, PROTREADPROTWRITE, MAPPRIVATEMAPFIXED MAPDENYWRITE, 3, 0x5000) = 0x4007b000 close(3) = 0 open("-lib-libresmgr.so.0.9.8", ORDONLY) = 3 read(3, "-177ELF-1-1-1-0-0-0-0-0-0-0-0-0-3-0-3-0-1-0-0-0-300-16"..., 512) = 512 fstat64(3, {stmode=SIFREG0755, stsize=15156, ...}) = 0 oldmmap(NULL, 14792, PROTREADPROTEXEC, MAPPRIVATEMAPDENYWRITE, 3, 0) = 0x4007d000 madvise(0x4007d000, 14792, MADVSEQUENTIAL0x1) = 0 oldmmap(0x40080000, 4096, PROTREADPROTWRITE, MAPPRIVATEMAPFIXED MAPDENYWRITE, 3, 0x2000) = 0x40080000 close(3) = 0 open("-lib-libdl.so.2", ORDONLY) = 3 read(3, "-177ELF-1-1-1-0-0-0-0-0-0-0-0-0-3-0-3-0-1-0-0-0-0-f-0-000"..., 512) = 512 fstat64(3, {stmode=SIFREG0755, stsize=10480, ...}) = 0 oldmmap(NULL, 12392, PROTREADPROTEXEC, MAPPRIVATEMAPDENYWRITE, 3, 0) = 0x40081000 madvise(0x40081000, 12392, MADVSEQUENTIAL0x1) = 0 oldmmap(0x40083000, 8192, PROTREADPROTWRITE, MAPPRIVATEMAPFIXED MAPDENYWRITE, 3, 0x1000) = 0x40083000 close(3) = 0 open("-lib-libgccs.so.1", ORDONLY) = 3 read(3, "-177ELF-1-1-1-0-0-0-0-0-0-0-0-0-3-0-3-0-1-0-0-0-340-22"..., 512) = 512 fstat64(3, {stmode=SIFREG0755, stsize=31852, ...}) = 0 oldmmap(NULL, 31824, PROTREADPROTEXEC, MAPPRIVATEMAPDENYWRITE, 3, 0) = 0x40085000 madvise(0x40085000, 31824, MADVSEQUENTIAL0x1) = 0 oldmmap(0x4008c000, 4096, PROTREADPROTWRITE, MAPPRIVATEMAPFIXED MAPDENYWRITE, 3, 0x6000) = 0x4008c000 close(3) = 0 open("-lib-tls-libc.so.6", ORDONLY) = 3 read(3, "-177ELF-1-1-1-0-0-0-0-0-0-0-0-0-3-0-3-0-1-0-0-0pO-1-000"..., 512) = 512 fstat64(3, {stmode=SIFREG0755, stsize=1201648, ...}) = 0 oldmmap(NULL, 1150108, PROTREADPROTEXEC, MAPPRIVATEMAPDENYWRITE, 3, 0) = 0x4008d000 madvise(0x4008d000, 1150108, MADVSEQUENTIAL0x1) = 0 oldmmap(0x401a0000, 16384, PROTREADPROTWRITE, MAPPRIVATEMAPFIXED MAPDENYWRITE, 3, 0x113000) = 0x401a0000 oldmmap(0x401a4000, 7324, PROTREADPROTWRITE, MAPPRIVATEMAPFIXED MAPANONYMOUS, -1, 0) = 0x401a4000 close(3) = 0 oldmmap(NULL, 4096, PROTREADPROTWRITE, MAPPRIVATEMAPANONYMOUS, -1, 0) = 0x401a6000 oldmmap(NULL, 4096, PROTREADPROTWRITE, MAPPRIVATEMAPANONYMOUS, -1, 0) = 0x401a7000 mprotect(0x401a0000, 4096, PROTREAD) = 0 seg32bit:1, contents:0, readexeconly:0, limitinpages:1, segnotpresent:0, useable:1}) = 0 munmap(0x40018000, 163365) = 0 geteuid32() = 500 getrlimit(RLIMITNOFILE, {rlimcur=1024, rlimmax=1024}) = 0 brk(0) = 0x8218000 brk(0x8239000) = 0x8239000 close(0) = 0 close(1) = 0 write(2, , 0) = 0 getpgrp() = 23141 open("-tmp-.tX0-lock", OWRONLYOCREATOEXCL, 0644) = 0 getpid() = 23142 write(0, " 23142-n", 11) = 11 fchmod(0, 0444) = 0 close(0) = 0 link("-tmp-.tX0-lock", "-tmp-.X0-lock") = -1 EEXIST (File exists) open("-tmp-.X0-lock", ORDONLY) = 0 read(0, " 6665-n", 11) = 11 close(0) = 0 kill(6665, SIG0) = -1 EPERM (Operation not permitted) unlink("-tmp-.tX0-lock") = 0 write(2, "-nbane server error:-n", 21 bane server error: ) = 21 write(2, "Server is already active for dis"..., 116Server is already active for display 0 If this server is no longer running, remove tmp.X0-lock and start again. ) = 116 write(2, "-n", 1 ) = 1 write(2, "-nPlease consult the The X.Org Fo"..., 85 Please consult the The X.Org Foundation support for help. ) = 85 write(2, "-n", 1 ) = 1 rtsigprocmask(SIGBLOCK, CHLD, , 8) = 0 rtsigaction(SIGCHLD, NULL, {SIGDFL}, 8) = 0 rtsigprocmask(SIGSETMASK, , NULL, 8) = 0 nanosleep({1, 0}, {1, 0}) = 0 ioctl(-1, VTGETSTATE, 0xbfffcc80) = -1 EBADF (Bad file descriptor) ioctl(-1, KDSETMODE, 0) = -1 EBADF (Bad file descriptor) ioctl(-1, VIDIOCRESERVED or VTGETMODE, 0xbfffcc78) = -1 EBADF (Bad file descriptor) close(-1) = -1 EBADF (Bad file descriptor) chown32("-dev-tty0", 0, 0) = -1 EPERM (Operation not permitted) chown32(, 0, 0) = -1 ENOENT (No such file or directory) exitgroup(1) = ?