My computer can't wake up after suspend

Hello,everybody.
when my computer suspend, it can't be wake up again.
The power light is on,but computer does not have any reaction.
The hard disk does not work.
I use lenovo k2450. OS:archlinux+kde.

TheSaint wrote:
Show
$ grep -iE '.*(power|suspend).*' /var/log/Xorg.0.log
$ dmesg |grep -iE '.*(power|suspend).*' # less probable to be used.
# journalctl -b |grep -iE '.*(power|suspend).*
Are we going to guess, or will you be more cooperative ?
Thank you for answer.
grep -iE '.*(power|suspend).*' /var/log/Xorg.0.log
[ 11.694] (II) config/udev: Adding input device Power Button (/dev/input/event4)
[ 11.694] (**) Power Button: Applying InputClass "evdev keyboard catchall"
[ 11.729] (II) Using input driver 'evdev' for 'Power Button'
[ 11.729] (**) Power Button: always reports core events
[ 11.729] (**) evdev: Power Button: Device: "/dev/input/event4"
[ 11.729] (--) evdev: Power Button: Vendor 0 Product 0x1
[ 11.729] (--) evdev: Power Button: Found keys
[ 11.729] (II) evdev: Power Button: Configuring as keyboard
[ 11.729] (II) XINPUT: Adding extended input device "Power Button" (type: KEYBOARD, id 6)
dmesg |grep -iE '.*(power|suspend).*' # less probable to be used.
[ 0.272636] ACPI: Power Resource [PUBS] (on)
[ 1.039956] usb: port power management may be unreliable
[ 5.490791] input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input5
[ 5.490795] ACPI: Power Button [PWRF]

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annihilator,
Quoting from my own post:
""It could be a PMU problem. The PMU is actually a tiny computer within the computer. It's official designation is PMU99.
http://developer.apple.com/documentation/Hardware/DeveloperNotes/Macintosh_CPUs-G4/12inchPowerBookG4/2_Architecture/chapter_3_section4.html
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Message was edited by: spudnuty

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please do not create multiple threads in different sub forums for similar issues.
Please read our forum rules and follow them.
Closing....

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TheSaint wrote:
Show
$ grep -iE '.*(power|suspend).*' /var/log/Xorg.0.log
$ dmesg |grep -iE '.*(power|suspend).*' # less probable to be used.
# journalctl -b |grep -iE '.*(power|suspend).*
Are we going to guess, or will you be more cooperative ?
Thank you for answer.
grep -iE '.*(power|suspend).*' /var/log/Xorg.0.log
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[ 11.729] (II) Using input driver 'evdev' for 'Power Button'
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[ 11.729] (**) evdev: Power Button: Device: "/dev/input/event4"
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[ 11.729] (--) evdev: Power Button: Found keys
[ 11.729] (II) evdev: Power Button: Configuring as keyboard
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