ubuntu 10.04 64bit
2.6.32-22-generic
intel core i7 820qm
ati radeon hd4670
it's a dell xps studio 16

it mostly doesn't freeze but in firefox i can reproduze freezes (screen goes fullscreen one colour - mostly black or the background-colour of the website i visit).
it happens when i click on a link to a website with heavy java-script use or flash-content?! *just my opinion*

and if it once went unresponsible and i do a powerdown.... and then reboot it... i can get it freezing again and again and again... just by visiting the same website and clicking on a link?!

with google chrome or opera there are no problem at this point... and when i opened the site in opera or chrome... firefox can load it without freezing up too?!
it's really strange...

here's my log:
(you can see where i had to reboot my device because it was unresponsible... just look at the timestamps... where they are resetted)

May 17 17:09:54 xb666mx kernel: [79086.358523] CE: hpet increasing min_delta_ns to 384426 nsec
May 17 17:14:56 xb666mx kernel: [79388.634363] CE: hpet increasing min_delta_ns to 576638 nsec
May 17 18:14:03 xb666mx kernel: [    1.572661] hpet0: at MMIO 0xfed00000, IRQs 2, 8, 24, 25, 26, 27, 28, 0
May 17 18:14:03 xb666mx kernel: [    1.572667] hpet0: 8 comparators, 64-bit 14.318180 MHz counter
May 17 18:14:03 xb666mx kernel: [    1.870518] rtc0: alarms up to one month, y3k, 242 bytes nvram, hpet irqs
May 17 18:14:03 xb666mx kernel: [    1.872291] WARNING: at /build/buildd/linux-2.6.32/arch/x86/kernel/hpet.c:392 hpet_next_event+0x7a/0x90()
May 17 18:14:03 xb666mx kernel: [    1.872324]  [<ffffffff810375ca>] hpet_next_event+0x7a/0x90
May 17 18:14:03 xb666mx kernel: [    1.872328]  [<ffffffff81037610>] hpet_legacy_next_event+0x10/0x20
May 17 18:14:03 xb666mx kernel: [    6.549874] CE: hpet increasing min_delta_ns to 15000 nsec
May 17 18:14:03 xb666mx kernel: [    6.650124] CE: hpet increasing min_delta_ns to 22500 nsec
May 17 18:15:12 xb666mx kernel: [   63.410673] CE: hpet increasing min_delta_ns to 33750 nsec
May 17 19:41:45 xb666mx kernel: [ 5253.084764] CE: hpet increasing min_delta_ns to 50624 nsec
May 17 19:42:17 xb666mx kernel: [ 5284.782014] CE: hpet increasing min_delta_ns to 75936 nsec
May 17 19:52:05 xb666mx kernel: [ 5873.366686] CE: hpet increasing min_delta_ns to 113904 nsec
May 17 20:00:55 xb666mx kernel: [    1.572777] hpet0: at MMIO 0xfed00000, IRQs 2, 8, 24, 25, 26, 27, 28, 0
May 17 20:00:55 xb666mx kernel: [    1.572784] hpet0: 8 comparators, 64-bit 14.318180 MHz counter
May 17 20:00:55 xb666mx kernel: [    1.870981] rtc0: alarms up to one month, y3k, 242 bytes nvram, hpet irqs
May 17 20:00:55 xb666mx kernel: [    1.872482] WARNING: at /build/buildd/linux-2.6.32/arch/x86/kernel/hpet.c:392 hpet_next_event+0x7a/0x90()
May 17 20:00:55 xb666mx kernel: [    1.872513]  [<ffffffff810375ca>] hpet_next_event+0x7a/0x90
May 17 20:00:55 xb666mx kernel: [    1.872517]  [<ffffffff81037610>] hpet_legacy_next_event+0x10/0x20
May 17 20:00:56 xb666mx kernel: [    8.757834] CE: hpet increasing min_delta_ns to 15000 nsec
May 17 20:03:10 xb666mx kernel: [  130.990757] CE: hpet increasing min_delta_ns to 22500 nsec
May 17 20:03:13 xb666mx kernel: [  133.958229] CE: hpet increasing min_delta_ns to 33750 nsec
May 17 20:03:44 xb666mx kernel: [    1.572897] hpet0: at MMIO 0xfed00000, IRQs 2, 8, 24, 25, 26, 27, 28, 0
May 17 20:03:44 xb666mx kernel: [    1.572903] hpet0: 8 comparators, 64-bit 14.318180 MHz counter
May 17 20:03:44 xb666mx kernel: [    1.850243] rtc0: alarms up to one month, y3k, 242 bytes nvram, hpet irqs
May 17 20:03:44 xb666mx kernel: [    1.852231] WARNING: at /build/buildd/linux-2.6.32/arch/x86/kernel/hpet.c:392 hpet_next_event+0x7a/0x90()
May 17 20:03:44 xb666mx kernel: [    1.852263]  [<ffffffff810375ca>] hpet_next_event+0x7a/0x90
May 17 20:03:44 xb666mx kernel: [    1.852267]  [<ffffffff81037610>] hpet_legacy_next_event+0x10/0x20
May 17 20:03:45 xb666mx kernel: [    6.381019] CE: hpet increasing min_delta_ns to 15000 nsec
May 17 20:03:45 xb666mx kernel: [    6.480816] CE: hpet increasing min_delta_ns to 22500 nsec
May 17 20:06:47 xb666mx kernel: [  176.400356] CE: hpet increasing min_delta_ns to 33750 nsec
May 17 20:07:28 xb666mx kernel: [  216.776798] CE: hpet increasing min_delta_ns to 50624 nsec