On Fri, 28 Jan 2011, Chris Wilson wrote:
> On Fri, 28 Jan 2011 04:24:17 -0500 (EST), "Robert P. J. Day" <rpjday@xxxxxxxxxxxxxx> wrote:
> > On Fri, 28 Jan 2011, Chris Wilson wrote:
> >
> > > Well, we have two endpoints, so let git attack:
> > >
> > > $ git bisect start
> > > $ git bisect good 58bbf018a70c562437eeae121a5d021ba7fe56a5
> > > $ git bisect bad abb72c828878a2c69b2cfb33ac30007c8ecd735e
> > >
> > > That shouldn't take more than a few recompiles to identify the
> > > troublemaker.
> >
> > ok, i can get to that in a bit. might take a while since this
> > system is not exactly a screamer but i'm curious -- have you heard no
> > other reports of people running into this issue? i'm going to be
> > embarrassed if it turns out it's something *i've* done but, at this
> > point, it seems fairly reproducible.
>
> This is the first I'm aware of. It could just be the tip of the iceberg...
the git bisection finally resolved to:
BAD: b705120e
GOOD: 8a327f23
so the culprit appears to be:
b705120e4198315f4ae043de06c62f65e0851fd3 is the first bad commit
commit b705120e4198315f4ae043de06c62f65e0851fd3
Author: Michael Karcher <kernel@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>
Date: Sun Jan 23 18:17:17 2011 +0000
drm/i915: Use consistent mappings for OpRegion between ACPI and i915
The opregion is a shared memory region between ACPI and the graphics
driver. As the ACPI mapping has been changed to cachable in commit
6d5bbf00d251cc73223a71422d69e069dc2e0b8d, mapping the intel opregion
non-cachable now fails. As no bus-master hardware is involved in the
opregion, cachable map should do no harm.
Tested on a Fujitsu Lifebook P8010.
Signed-off-by: Michael Karcher <kernel@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>
[ickle: convert to acpi_os_ioremap for consistency]
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
thoughts? once again, the salient output from "lspci -v":
00:02.0 VGA compatible controller: Intel Corporation Core Processor
Integrated Graphics Controller (rev 12) (prog-if 00 [VGA controller])
Subsystem: Acer Incorporated [ALI] Device 031c
Flags: bus master, fast devsel, latency 0, IRQ 41
Memory at d0000000 (64-bit, non-prefetchable) [size=4M]
Memory at c0000000 (64-bit, prefetchable) [size=256M]
I/O ports at 3050 [size=8]
Expansion ROM at <unassigned> [disabled]
Capabilities: <access denied>
Kernel driver in use: i915
Kernel modules: i915
rday
--
========================================================================
Robert P. J. Day Waterloo, Ontario, CANADA
http://crashcourse.ca
Twitter: http://twitter.com/rpjday
LinkedIn: http://ca.linkedin.com/in/rpjday
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