I have an HP Pavilion x360 n010dx running Ubuntu 14.10 Utopic Unicorn with the Linux kernel "linux-signed-image-3.16.0-23-generic", and I am having issues with Ubuntu starting up as well as with Ubuntu turning itself off.

The first time I turn the computer on from its completely shut off state, and after I input my disk encryption password, the computer will hang at the crypt_swap being successfully set up message. I then have to hold down the power button to force the computer to turn off. However, when I try to start up the computer again, it will get past the crypt_swap message, check the disk for errors and start up perfectly fine. It seems to work every other time.

When it comes to turning the computer off, Ubuntu itself can't seem to make the computer do so. When I tell the computer to shut down through Ubuntu, it will transition to the purple Ubuntu splash screen and freeze there after a couple of seconds. The only way for me to actually turn the computer off is to once again hold down the power button.

I read on another forum (I can't find the link right now...) that it could be a module called "hp_accel" that is causing the startup problem. I believe this may be it, because I started Ubuntu through Recovery Mode in GRUB, and the last message to appear had something to do with hp_accel reverting to default configuration since it couldn't identify my laptop before the startup process froze up as usual. Concerning the shutdown issue, I have no idea what could be causing that.

So, what can I do to fix these issues, if anything? Should I provide some sort of log to help diagnose the problem? If so, what log would I want to get and how do I get it (never dealt with logs and log-fetching before so I have no idea what to do when it comes to that)?


SIDE NOTE: I know that the latest Linux kernel image I can get through the Ubuntu Software Update program is 3.16.0-29, but with that image, my computer would freeze on startup 100% of the time. So, I reverted back to the -23 image because I could at least get it to start some of the time.


using Ubuntu GNOME 15.04 Alpha 2 solves most of the problems. My computer fails to load when I let it start with no intervention. If I stroke an arrow key and select Ubuntu (even if it's the only OS), the computer loads.

The shut down seems to be fixed with this.

echo "blacklist dw_dmac" | sudo tee -a /etc/modprobe.d/blacklist.conf
echo "blacklist dw_dmac_core" | sudo tee -a /etc/modprobe.d/blacklist.conf

By the way, Ubuntu 15.04 is really stable in my PC, only one reboot in two weeks, even with Alpha 1. So, more stable than Windows 8.1.

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  • I am in the process of downloading Ubuntu 15.04 nightly to install. Would you recommend that I do an upgrade, or should I just wipe everything and do a fresh install? Also, can you please tell me what those commands you posted actually do and what they change? I just put them in now and will do a test shutdown and see if the issue is fixed. Thanks! – Jasonmerc Feb 2 '15 at 23:35
  • Just an update: Those commands above didn't fix the shutdown issue. I will just do a clean install of the latest 15.04 daily build, and then I will put the commands above in and see if they fix the problem. – Jasonmerc Feb 2 '15 at 23:57
  • Sorry for the late response, but those commands do in fact fix the shutdown issue, and I believe they have helped with the startup one as well. – Jasonmerc Feb 9 '15 at 0:43
  • This fixed my issues random freeze and shutdown. How could you know that it was this mods that was causing the issue, and what are these mods for? – nicoX Jul 24 '15 at 6:58

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