can't boot ubuntu with C1E support enabled

[laulau]

hi ;
sorry not following bug report procedure, but as the computer involved isn't able to boot, I must fidn a way to report.

So the computer is hanging very quickly at the beggining of the boot (no kernel panic), then progressing a little when pressing a key, and then it is completly hanged (keyboard unresponsive, but no kernel panic).

Here are the details :
tried ubuntu 13.04, 12.04, live-cd, installed (before I bought my cards) ... same behaviour
card are 2x radeon 7850
motherboard is Asus M4A89GTD PRO/USB3
CPU is AMD FX 8320

I'll add 2 "screenshots" corresponding to the 2 hangs described.

[Brad Figg (brad-figg)]

This change was made by a bot.

[Joseph Salisbury (jsalisbury)]

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v3.11 kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'.
Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.11-rc1-saucy/

[Joseph Salisbury (jsalisbury)]

Another helpful test would be to try the latest Saucy daily image from:
http://cdimage.ubuntu.com/daily-live/current/

[laulau (olaulau)]

it also fail with latest saucy daily.
I've tried without crossfire bridge, same behaviour. will try without the 2nd card.

Think it's due to the beta BiOS to support AM3+ CPU on this motherboard.
I will try an older one when I have time to switch back to the older CPU.

[laulau (olaulau)]

I tried downgrading BIOS to all versions which supports AM3+ CPU's (3030, 3029, 3027) : same behaviour.
I unplugged one of the 2 video card : same behaviour.

then I realized that, on the first screenshot, it seems to hang after ACPI.
So instead of testing with BIOS default settings, I turned off many options, and it worked !
then I switched on those options one by one, to find that it's C1E that has to be disabled.

replugging the 2nd card and flashing to le lastest BIOS works fine if I disable C1E.
C1E support is not very important as C6 works (CPU freq slow down when idle).

kernel loads correctly, X server doesnn't work properly on 13.04 and saucy daily. but it works fine on 12.04 !
but this is another bug.

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]