I am new with Ubuntu. My new company gave me a Dell Latitude E5440 laptop running Windows 7 64 bit. I am trying to install Ubuntu but neither 12.04 nor 14.04 boot.
The common Error that I take on the booting screen is:
dmar: Failed to find handle for ACPI object \_SB.PCIO.I2C0
dmar: Failed to find handle for ACPI object \_SB.PCIO.I2C1
dmar: Failed to find handle for ACPI object \_SB.PCIO.UA01
dmar: Failed to find handle for ACPI object \_SB.PCIO.SDHC
mmc0: Unknown controller version (3). Yo may experience problems
Best Answer
I had similar problems with installing Ubuntu on my new Lenovo W540 portable workstation (also a dual-boot setup). I tried installing 15.04, 14.04, and 14.04.2 -- both amd64 and x86 versions with to avail. While I've been using Ubuntu for about two years now I'm still rather n00b in the under-the-hood side and felt that I was not getting ahead with resolving my problem. Until I found this question, that is.
What Mitch pointed to ended up solving my problem. Well, this problem anyways (more at the bottom about my new, possibly related issues). From the link he provided I found my way to Ubuntu Help's BootOptions page that detailed (clearly enough) how to set the
acpi=off
parameter when booting the liveCD.To detail the steps that I did:
acpi=off
as part of that (via pressing F6 in the Advanced options screen). FYI, I pressed the Esc key "when the small logo appears at the bottom of your screen". The instructions note that any key should work.That's really it. The installation (with
acpi=off
) didn't run into any irregular issues of any kind. Now, I'm not sure but I think I chose to also install both updates and third-party applications in the installation options. Some have noted that not selecting these have helped in problematic installations. You might want to try without if you have issues.Now, I should add that while the first boot to Ubuntu after the installation was completely normal I ran into a halt on my second boot to Ubuntu after I had installed the first detected batch of updates (in my case about 180MB, IIRC). I can't remember for sure if the system stalled/froze when powering down or when powering up, unfortunately. Anyways, I was able to resolve that halt by adding the
acpi=off
kernel parameter in the Grub options as detailed (again, clearly enough) in the question that Mitch linked to above (in the Chosen Answer to the question answered by izx).I should finally add that while the installation seems to have gone through fine I did run into two new issues.
I don't have a solution for neither one of the two new problems as is.
I hope the installation solution that worked for me helps you too.