Hi Andre,
I also have upgraded to 16.10, hoping for the bug to be fixed, as
everything seemed to go smooth until kernel 4.7. However, I still got
kernel panics.
In short, kernel 4.5 didn't have the bug: it was introduced by the
backport Canonical made of amdgpu to 4.4. However the same bug, or a
Public bug reported:
A Dell Inspiron 5448 / 0YDTG3 laptop (BIOS A06 10/12/2015), which used
to work well with Ubuntu trusty and Ubuntu wily releases (using fglrx
driver), presents multiple issues with Ubuntu xenial.
When the amdgpu driver tries to activate the Radeon GPU, a NULL pointer
dereferen
Behavior with 4.6.0-040600rc7-generic appears to be even saner than with
4.5.0-050400, although the AMD GPU is still not usable ("DRI_PRIME=1
glxgears" opens a black window).
Only after reporting this bug, I found that 4.5.0-050400 presented
issues with sound output in the HDMI port (sound output
** Changed in: linux (Ubuntu)
Status: Fix Released => Confirmed
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https://bugs.launchpad.net/bugs/1579374
Title:
amdgpu causes NULL pointer dereference when trying to
Will bisect work in this case? I had understood from the release notes
that most of the 4.5-vanilla's amdgpu was backported to Ubuntu's 4.4
kernel.
As I commented in the first message, 4.5.0 does not present the NULL ptr
dereference, so it would not really be a bisect from 4.4 to 4.6-rc7, but
from
** Tags removed: kernel-fixed-upstream-4.6-rc7
** Tags added: kernel-fixed-upstream-4.5.0
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Title:
amdgpu causes NULL pointer derefer
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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Title:
amdgpu causes NULL pointer dereference when trying to u
I think they are the same. The bug manifests itself when using xorg, but
the root cause is the kernel null pointer dereference.
** Changed in: linux (Ubuntu)
Status: Expired => Incomplete
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Maybe we should mark it as confirmed now that Yuri bisected the kernel
in the other bug?
However I still think we should just put some test to check whether the
pointer is NULL, we already have the stacktrace. Maybe I can try to
patch it out when I get some spare time.
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