tags 627372 + upstream patch moreinfo quit 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 -j<num> 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