Just wanted to add here that I think I've found an even simpler
workaround. It looks like passing pci=bios as a kernel parameter
consistently allows the GPU to load, regardless of kernel version or
power source. I haven't tested it a whole lot, but so far it has worked
100%.
--
You received this
It's been a while, but I've found the time to dig much deeper into this
and familiarize myself with the kernel code some. Actually, I feel
comfortable with the idea of directly contacting the appropriate mailing
list now so this is more to keep the record up-to-date than a request
for more triage.
Hmm... so I've just finished a first set of tests with reverting that commit,
and I definitely have results, though they aren't as cut-and-dry as I hoped.
When I reverted the commit, there were merge conflicts in:
drivers/acpi/scan.c
drivers/dma/acpi-dma.c
Since I really have no clue how these
So after another couple of months, I've managed to do more testing, and
I may have found something useful. First off, two fresh, stable versions
of the Ubuntu kernel have shown the bug: v3.2.0-56 (64-bit) and
v3.5.0-44 (32-bit). Also, the most recent package from the Ubuntu
mainline kernel PPA,
I was a little confused about exactly which version of the kernel you
wanted to test, but it's a moot point because all of the ones I tried
had the bug still.
I'm still using Ubuntu 12.04 so sudo apt-get dist-upgrade just keeps me
on v3.5.0-40, which definitely has the bug. I also tested
So I've been busy, but I have some more useful info. I've confirmed the
bug's still in both version 3.5.0-40 (32 bit) and 3.2.0-53 (64 bit) of
the Ubuntu kernel.
However, while I've been busy, I had the idea of just splicing the
changes from Xiao's patch (which we found in the last bisect) into
Hello again, I just thought I would make a quick update. I noticed that
the commit that fixed the mainstream build has been backported into
recent stable kernels. Unfortunately, I'm still seeing the bug on my
32-bit kernel (v3.5.0-37), and while it hasn't popped up for the current
64-bit kernel
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