tags 627372 + upstream patch moreinfo
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Hi Alan,
Alan Zimmerman wrote:
Console turns black during boot, roughly at the point where normally the
console font changes.
Thanks again. At last there is a patch to test (attached). Could you
try it?
Possible instructions:
0. Prerequisites
apt-get install git build-essential
1. Get the kernel history if you don't already have it
git clone \
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
2. Add point releases
cd linux
git remote add stable \
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git
git fetch stable
3. Configure, build, and test
git checkout stable/linux-3.2.y
cp /boot/config-$(uname -r) .config; # current configuration
make localmodconfig; # optional: minimize configuration
make deb-pkg; # optionally with -jnum for parallel build
dpkg -i ../name of package; # as root
reboot
Hopefully it reproduces the black screen at boot.
4. Try the patch
cd linux
git am -3sc /path/to/the/patch
make deb-pkg; # maybe with -j4
dpkg -i ../name of package; # as root
reboot
An alternative set of instructions is at [1].
If it works, we can try applying the patch and pass this information
upstream to help them decide when to roll it out.
Hope that helps,
Jonathan
[1]
http://kernel-handbook.alioth.debian.org/ch-common-tasks.html#s-common-official
or the corresponding page in the debian-kernel-handbook package
From: Chris Wilson ch...@chris-wilson.co.uk
Date: Tue, 24 Apr 2012 16:36:50 +0100
Subject: drm/i915: Remove too early plane enable on pre-PCH hardware
commit 969d380a39d33f7533b6dcee35e834109d23f9e9 upstream.
Enabling the plane before we have assigned valid address means that it
will access random PTE (often with conflicting memory types) and cause
GPU lockups. However, enabling the plane too early appears to workaround
a number of bugs in our modesetting code.
Cc: Franz Melchior melchior.fr...@gmail.com
References: https://bugs.freedesktop.org/show_bug.cgi?id=39947
References: https://bugs.freedesktop.org/show_bug.cgi?id=41091
References: https://bugs.freedesktop.org/show_bug.cgi?id=49041
Signed-off-by: Chris Wilson ch...@chris-wilson.co.uk
Acked-by: Jesse Barnes jbar...@virtuousgeek.org
Signed-off-by: Daniel Vetter daniel.vet...@ffwll.ch
Signed-off-by: Jonathan Nieder jrnie...@gmail.com
---
drivers/gpu/drm/i915/intel_display.c |1 -
1 file changed, 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/intel_display.c
b/drivers/gpu/drm/i915/intel_display.c
index 390768fce597..fe9b5fca9755 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -5195,7 +5195,6 @@ static int i9xx_crtc_mode_set(struct drm_crtc *crtc,
I915_WRITE(DSPCNTR(plane), dspcntr);
POSTING_READ(DSPCNTR(plane));
- intel_enable_plane(dev_priv, plane, pipe);
ret = intel_pipe_set_base(crtc, x, y, old_fb);
--
1.7.10
