I've a strange problem with my ubuntu 10.04 installation. Whenever i boot into ubuntu the entire system freezes / hangs soon after (~ 2 mins in). This problem exists on my windows 7 installation too. However if i start World of Warcraft or Warcraft on windows it doesnt hang for the duration i'm playing the game. After i stop playing and exit the game my laptop hangs inside 2 mins. Here is when it gets weirder. If i disconnect the charger, the laptop doesn't hang. However when I start it in ubuntu recovery mode and drop to root shell and use the 'startx' command everything works perfectly. I cannot figure out what the problem is.

i have an intel core2duo 2.2ghz processor, intel mobile 965 graphics, 2 GB RAM

for more details here is the output of cat /proc/cpuinfo :

processor    : 0
vendor_id    : GenuineIntel
cpu family    : 6
model        : 15
model name    : Intel(R) Core(TM)2 Duo CPU     T7500  @ 2.20GHz
stepping    : 11
cpu MHz        : 2201.000
cache size    : 4096 KB
physical id    : 0
siblings    : 2
core id        : 0
cpu cores    : 2
apicid        : 0
initial apicid    : 0
fdiv_bug    : no
hlt_bug        : no
f00f_bug    : no
coma_bug    : no
fpu        : yes
fpu_exception    : yes
cpuid level    : 10
wp        : yes
flags        : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc arch_perfmon pebs bts pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm lahf_lm ida tpr_shadow vnmi flexpriority
bogomips    : 4389.80
clflush size    : 64
power management:

processor    : 1
vendor_id    : GenuineIntel
cpu family    : 6
model        : 15
model name    : Intel(R) Core(TM)2 Duo CPU     T7500  @ 2.20GHz
stepping    : 11
cpu MHz        : 2201.000
cache size    : 4096 KB
physical id    : 0
siblings    : 2
core id        : 1
cpu cores    : 2
apicid        : 1
initial apicid    : 1
fdiv_bug    : no
hlt_bug        : no
f00f_bug    : no
coma_bug    : no
fpu        : yes
fpu_exception    : yes
cpuid level    : 10
wp        : yes
flags        : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc arch_perfmon pebs bts pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm lahf_lm ida tpr_shadow vnmi flexpriority
bogomips    : 4388.96
clflush size    : 64
power management:

here is the output of cat /proc/meminfo

MemTotal:        2052440 kB
MemFree:           55924 kB
Buffers:          579352 kB
Cached:           821752 kB
SwapCached:          704 kB
Active:           897124 kB
Inactive:        1032256 kB
Active(anon):     412140 kB
Inactive(anon):   264804 kB
Active(file):     484984 kB
Inactive(file):   767452 kB
Unevictable:           0 kB
Mlocked:               0 kB
HighTotal:       1178440 kB
HighFree:           6012 kB
LowTotal:         874000 kB
LowFree:           49912 kB
SwapTotal:        995988 kB
SwapFree:         986616 kB
Dirty:              8928 kB
Writeback:             0 kB
AnonPages:        527596 kB
Mapped:            76536 kB
Slab:              39480 kB
SReclaimable:      21100 kB
SUnreclaim:        18380 kB
PageTables:         5672 kB
NFS_Unstable:          0 kB
Bounce:                0 kB
WritebackTmp:          0 kB
CommitLimit:     2022208 kB
Committed_AS:    1856400 kB
VmallocTotal:     122880 kB
VmallocUsed:       11928 kB
VmallocChunk:     104644 kB
HugePages_Total:       0
HugePages_Free:        0
HugePages_Rsvd:        0
HugePages_Surp:        0
Hugepagesize:       4096 kB
DirectMap4k:       16376 kB
DirectMap4M:      892928 kB

Also the kern.log doesn't show any errors. What I want to know is what might be the problem, how i could test for it and if there are any solutions I could try. Thanks :).