I have a toshiba laptop L775D-S7222 and have a problem on any linux distro so far that I tried that the computer restarts instead of shutting down. This happens only on ac power, on bat power it shuts down fine.

The other problem I am having is that if I boot on bat power the built-in mouse and kb do not work. Once they stop even rebooting on ac power will not help. What does help is to change the bios settings for the internal mouse (en/dis-able, either way) and reboot.

The last (I wish) problem is that the hibernate and standby dont work at all. I am assuming that these are all intertwined problems.

My question here is where can I start looking and try to do to fix this problem. What are the steps to fully document/log what is happening during bootup etc.. to get this debugged.

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Thanks

What OS have you tried?

Did you try a live CD?

I mainly tried ubuntu. I have tried live cd, and even a working install on usb hdd that works fine on different hardware. I also tried linuxmint (I know it too simillar to ubuntu) and some smaller distros like slitaz, puppy.

I am dling opensuse to see if that works.

I tried a live cd out in the store before I bought mine. Everything seemed to work great, but I didn't try sleep.

I got home and found out several problems, depending on the distro:

• Sleep makes the screen go black, never comes back, ever! To get the machine to boot, I have to unplug the power and remove the battery.
• Hibernate almost works, but hangs
• Sometimes both modes look like they are in the proper state but the CPU fan is still spinning
• Once in a while keyboard and mouse both do not work on boot. It takes 3 reboots for them to come back (or going in and out of bios saving changes).

I have tried Ubuntu 11.10, 12.04 LTS beta, Fedora 16, Ultimate Edition 2.9 64bit and 3.0.1 32bit. So I am using a variety of kernels and graphics engines, 32 bit and 64 bit. All suffer from the same or close to the same issues. I think it must be something with the A6 chipset.

Ultimate Edition has been my Go-to distro for years because it almost always "Just Works" out of the box for everything. I have had the best success with it so far on this L775D, but I have been close with Ubuntu 12.04. Fedora has been the most aggravating so far.

I have found some things that have helped, but have not made suspend to ram (sleep) mode work 100% yet, but hibernate to disk seems to work.
For me adding acpi_osi=Linux to the boot has helped. Also searching for how to make Ubuntu hibernate returned a few items that point to working with pm-tools and I made some configuration changes in /etc/pm. Sorry, I just wiped my drive out trying Fedora 17beta, so I don't have the config file right now. I really want to get onto a form of 12.04 LTS for the long term stability, I don't want to have to redo my laptop for a few years!

I need to find out how to keep it rebooting after hibernation and get sleep mode to work. If anyone knows how to keep it from rebooting right after hibernation or know why the keyboard and mouse go missing every few boots, I need your help!

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I just found this that may be of help for people: https://wiki.archlinux.org/index.php...te_L775D_S7340

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