After upgrading to 1.7.2-2 from 1.6.something the idle cpu usage
of my xserver climbs from a usual few percent slowly to 100% over
several hours. I thought this was a radeon driver bug but I noticed
it happening on my other box (nvidia closed drivers) too. When I
restart X the process starts again.

I'm using the SLiM login manager and xmonad without any fancy
compositing or anything unusual.

PKG versions:
extra/xorg-server 1.7.2-2
extra/nvidia 190.42-1
community/xmonad 0.9-2.1
extra/slim 1.3.1-5

Here is my xorg.conf and Xorg.0.log (attached):

1 Section "ServerLayout"
2 Identifier "Layout0"
3 Screen 0 "Screen0"
4 InputDevice "Keyboard0" "CoreKeyboard"
5 InputDevice "Mouse0" "CorePointer"
6 EndSection
7
8 Section "Files"
9 ModulePath "/usr/lib/xorg/modules"
10 FontPath "/usr/share/fonts/misc"
11 FontPath "/usr/share/fonts/100dpi:unscaled"
12 FontPath "/usr/share/fonts/75dpi:unscaled"
13 FontPath "/usr/share/fonts/TTF"
14 FontPath "/usr/share/fonts/Type1"
15 EndSection
16
17 Section "Module"
18 Load "glx"
19 Load "extmod"
20 Load "record"
21 Load "dri2"
22 Load "dri"
23 Load "dbe"
24 EndSection
25
26 Section "InputDevice"
27 Identifier "Mouse0"
28 Driver "mouse"
29 Option "Protocol" "auto"
30 Option "Device" "/dev/psaux"
31 Option "Emulate3Buttons" "no"
32 Option "ZAxisMapping" "4 5"
33 EndSection
34
35 Section "InputDevice"
36 Identifier "Keyboard0"
37 Driver "kbd"
38 EndSection
39
40 Section "Monitor"
41 Identifier "Monitor0"
42 DisplaySize 376 235
43 VendorName "Unknown"
44 ModelName "Unknown"
45 HorizSync 28.0 - 33.0
46 VertRefresh 43.0 - 72.0
47 Option "DPMS"
48 EndSection
49
50 Section "Device"
51 Identifier "Device0"
52 Driver "nvidia"
53 VendorName "NVIDIA Corporation"
54 EndSection
55
56 Section "Screen"
57 Identifier "Screen0"
58 Device "Device0"
59 Monitor "Monitor0"
60 DefaultDepth 24
61 SubSection "Display"
62 Depth 24
63 EndSubSection
64 EndSection


Steps to reproduce:

1. Turn on computer
2. Start X
3. Login to xmonad session
4. Leave computer idle for number of hours
5. Return and see /usr/bin/X eating 50% of your CPU
6. Return after a day and see Xorg eating 100% and
everything becoming quite unresponsive

This is very annoying, please advise...