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Message #115700
[Bug 1336451] Re: Cannot boot/run ubuntu without acpi=off or nolapic. Freezes otherwise.
So done some more digging into the problem. I found the page at:
https://01.org/linux-acpi/documentation/debug-how-isolate-linux-acpi-issues
I decided to try them all and see the effects. It went like this:
* acpi=off - Works, but looks terrible, trackpad doesnt work, keyboard spams keys randomly when pressed, unless you can press and release the key in like 1 millisecond.
* acpi=ht - Same as without nolapic.
* pci=noacpi - Says it gave up waiting on root device. That "/dev/disk/by-uuid/*kUbuntu's uuid*" does not exist. (got a pic)
* acpi=noirq - Same as without nolapic.
* pnpacpi=off - 1st attempt, froze at an apparently random point in bootup, touchpad on last line. 2nd attempt, kernel panic - not syncing (got a pic), 3rd attempt, froze at what seems to be the same point as attempt 1 (got a pic). 4th attempt, got to login screen then did the usual freeze. 5th attempt, same as 4th but the bootup was in the correct resolution. nice small text instead of huge zoomed in text.
* noapic - 1st attempt, stalled at bootup, 2nd attempt, got to login screen then the the usual freeze after 8ish seconds, 3rd attempt, same again exept froze almost instantly.
* nolapic - Always works. Is what my default boot options are set to. But performance suffers since then it only uses 1 cpu core.
There is another image of it booting but I forgot to name it with the
options I used. Its another kernel panic.
I then tried about 6 times to get as far as logging into tty1. Eventually I was lucky and quick enough to get in. After doing a quick cpuinfo to see the 6 cores working it froze again. But with a message! Another kernel panic. I think this might be the issue:
"Kernel panic - not syncing: Timeout synchronizing machine check over CPUs"
Pic of pci=noacpi - http://i294.photobucket.com/albums/mm82/cgar_of_ayr/linux%20boot%20errors/pcinoacpi.jpg
Pic of 2nd pnpacpi=off attempt - http://i294.photobucket.com/albums/mm82/cgar_of_ayr/linux%20boot%20errors/pnpacpioff_2.jpg
Pic of 2nd pnpacpi=off attempt - http://i294.photobucket.com/albums/mm82/cgar_of_ayr/linux%20boot%20errors/pnpacpioff_3.jpg
Pic of unknown option error - http://i294.photobucket.com/albums/mm82/cgar_of_ayr/linux%20boot%20errors/anotherPanic.jpg
Pic of it failing after logging in with no boot options - http://i294.photobucket.com/albums/mm82/cgar_of_ayr/linux%20boot%20errors/noParams.jpg
This help anyone think what it might be?
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https://bugs.launchpad.net/bugs/1336451
Title:
Cannot boot/run ubuntu without acpi=off or nolapic. Freezes otherwise.
Status in linux package in Ubuntu:
Confirmed
Bug description:
My laptop is a Clevo P570WM with Intel i7-3970X CPU and 2x AMD Radeon HD 7970M GPU's.
The distro used is Kubuntu 14.04 x64.
Without adding acpi=off or nolapic to the boot flags my laptop freezes
a few moments after getting to the login screen. I have tried various
kernels but the issue persists on all of them. The issue affects the
live CD, the minimal CD and Kubuntu when its installed.
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