** Also affects: linux
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1579374
Title:
amdgpu causes NULL pointer dereference when trying to
Filed a new report as suggested
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1656649
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Title:
amdgpu causes NULL pointer
** Tags removed: kernel-fixed-upstream
** Tags added: needs-upstream-testing yakkety
** Description changed:
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), has an issue in Xenial where
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
andre (acelere), it will help immensely if you filed a new report with Ubuntu,
using the default repository kernel (not mainline/upstream/3rd party) via a
terminal:
ubuntu-bug linux
Please feel free to subscribe me to it.
For more on why this is helpful, please see
This bug is still present for me. Did you guys manage to fix it?
I have since upgraded to 16.10 and no change.
Thanks.
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Title:
** Tags removed: kernel-fixed-upstream-4.5.0 latest-bios-a06
** Tags added: bios-outdated-a07 kernel-fixed-upstream-4.5
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Title:
[Expired for linux (Ubuntu) because there has been no activity for 60
days.]
** Changed in: linux (Ubuntu)
Status: Incomplete => Expired
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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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** This bug is no longer a duplicate of bug 1608042
64-bit XUbuntu 16.04 "Xenial" hybrid graphics (Intel + AMD): AMDGPU crashes
/ freezes / hangs entire system
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[Expired for linux (Ubuntu) because there has been no activity for 60
days.]
** Changed in: linux (Ubuntu)
Status: Incomplete => Expired
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** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
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Title:
amdgpu causes NULL pointer dereference when trying to
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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Title:
amdgpu causes NULL pointer dereference when trying to
As I reported here:
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-
amdgpu/+bug/1608042/comments/31
...my computer is exactly the same (Dell Inspiron 5448 laptop, BIOS A06,
hybrid graphics Intel Broadwell - module i915 + AMD Topaz XT R7
M260/M265 - module amdgpu) and after
sorry, installed the 4.5.7 kernel on Ubuntu Xenial (16.04) and still
problem persists. Also noticed that battery remaining and charging time
are not quite right , i don't know if this has to do with the amdgpu
driver.
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** 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
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
Paulo Matias, the next step is to fully reverse commit bisect from
kernel 4.4 to 4.6-rc7 in order to identify the last bad commit, followed
immediately by the first good one. Once this good commit has been
identified, it may be reviewed for backporting. Could you please do this
following
** Changed in: linux (Ubuntu)
Status: Fix Released => Confirmed
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Title:
amdgpu causes NULL pointer dereference when trying
** Changed in: linux (Ubuntu)
Status: Confirmed => Fix Released
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Title:
amdgpu causes NULL pointer dereference when trying
I'm not sure if it helps to share it, but a couple o days before you created
this thread I posted the same bug with my personal notebook crash report on
AskUbuntu:
http://askubuntu.com/questions/767163/ubuntu-16-kernel-bug-oops--1-smp-related-to-amdgpu/772787
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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
Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v4.6 kernel[0].
If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.
If the mainline kernel does not fix
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