Arch Linux

Description:
I am using a Dell n5050 Laptop with intel core i3 processer . although i had problem before with suspend on resuming but hibernate function worked fine . but after i upgraded to kernel 3.7.4-1 neither hibernate nor suspend works .
while using suspend before my system used to go to suspend fine while resume was not always successful but now when i start suspend screen goes blank while i could still see the LEDs of power and wifi running and no key reponse nor going to ssh works . sometimes the kernel straight forwardly goes to panic and i could see the caps lock light blinking

on hibernate before upgrade it used to work fine but now same symptoms .
downgrading to kernel 3.6.11-1 solves the problem . on kernel 3.7.4-1 i have tested everything removing all module which i think are causing the problem or trying to do suspend and hibernate without x running but nothing works .

i have also tried pm_trace but it does not show anything in dmesg



Additional info:
* package version(s)
* config and/or log files etc.


Steps to reproduce: