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Thread: Possible Power Mangement Bug: HP DM1Z

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  1. #1
    Join Date
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    Possible Power Mangement Bug: HP DM1Z

    Hey everyone,

    I recently bought a dm1z and posted on this forum the power problem I had. The dm1z would drain the battery about 10% per day that it wasn't used. After looking into this problem a little more, I found out that the wireless card and ethernet card still had power after shutting down any variant of ubuntu. After completing a fresh install of allot of ubuntu variants with an ethernet cable plugged in, I would remove the power supply, shut down the system and still see that power is being supplied to the ethernet port after shutdown (the dm1z has an led to signify that the port is still receiving power). The led would only shut off if I removed the battery and reinserting it meaning that it continually drained the battery even after shutdown . So I was just wondering if anyone with the dm1z has a similar power problem which would mean that's its either a hardware problem, a software problem or just my configuration?

    Thanks for any help,

    -Red
    Last edited by Redblade20XX; April 15th, 2011 at 05:59 PM.

  2. #2
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    Re: Possible Power Mangement Bug: HP DM1Z

    Yes, I can confirm this problem. Left my DM1Z on the shelf for 2 weeks and the battery drained to 0%.

  3. #3
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    Re: Possible Power Mangement Bug: HP DM1Z

    Possible work-around. The laptop seems to properly power off if you hold the power button down for 4 seconds. So:

    1. From within Linux, select "Reboot" instead of "Power Off".
    2. When the system has restarted and gotten to the BIOS, hit escape (to keep it from going further).
    3. Hold down the power button for 4 seconds.

  4. #4
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    Re: Possible Power Mangement Bug: HP DM1Z

    Quote Originally Posted by i_grok View Post
    Possible work-around. The laptop seems to properly power off if you hold the power button down for 4 seconds. So:

    1. From within Linux, select "Reboot" instead of "Power Off".
    2. When the system has restarted and gotten to the BIOS, hit escape (to keep it from going further).
    3. Hold down the power button for 4 seconds.
    Thanks for the confirm! I'm guessing this is a temp fix?

  5. #5
    Join Date
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    Re: Possible Power Mangement Bug: HP DM1Z

    Quote Originally Posted by Redblade20XX View Post
    Thanks for the confirm! I'm guessing this is a temp fix?
    Yes, this is definitely temporary! But it should work until the Linux kernel/Ubuntu shutdown is fixed. It's beyond my expertise - I would not expect a quick fix.

  6. #6
    Join Date
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    Re: Possible Power Mangement Bug: HP DM1Z

    Just confirming that as of Ubuntu 11.04 (desktop AMD64 version), the DM1-3010AU (E-350 1.6GHz, Radeon 6310, 320Gb HD, 2Gb DDR3, gigabit ethernet, wireless and bluetooth), which is similar to the DM1Z, also suffers this bug. The ethernet port stays lit up even though the machine should be off, and the battery loses about 10% per day, and will go to 0% (this happens even if no ethernet cable is plugged in, to be clear).

    Removing the battery and putting it back in turns it off properly. I never thought about the 4 second power button thing (even though I'm well aware of it) .. thanks, nice workaround

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