Won't Fix for now given issue correlated to Intel CPU errata, and final
errata WORKAROUND patch is to come from, and being worked on by upstream
kernel developers.
** Description changed:
After upgrading from stock Ubuntu 14.04 to 16.04 my laptop consistently
freezes up and is unresponsive
Hi Vincent i have been updated to the latest DELL/Intel bios since this
began. Did not help. Dell nor Intel ever fixed the issue. I will never
buy a Dell Ubuntu product ever again. Probably not any dell
product.though i realize this also affected HP and others who used the
same chip. This laptop
Andrew do you not try the patch?
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Title:
[Dell Inspiron 3451] WARNING: CPU: 1 PID: 1297 at /build/linux-lts-
4. You should remove cstate kernel parameter
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[Dell Inspiron 3451] WARNING: CPU: 1 PID: 1297 at /build/linux-lts-
There is an extremely non official patch for this problem that works
very well for me. Not perfectly but well. It's worth a try. Please use
it at your own risk.
I copy this from here: https://forum.manjaro.org/t/intel-bay-trail-
freezes-the-linux-kernel/1931/10
Hi Andrew,
Thank you for updating. Which kernel did you test, can you do a uname -a?
I supplied a kernel with both an auto-demotion patch and the C6 disable patch.
Christopher asks you to confirm if you are actually experiencing the exact bug
that Len Brown is trying to fix :
I forgot to add, if your BIOS is out of date, please update it. It's
important because some manufacturers made fixes there related to freeze
issues. It's also required for testing to have the same results as
others. Thank you
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Looking at the file Christopher linked to earlier states this:
"Organization: Intel Open Source Technology Center
The Baytrail SOC has a built-in feature to demote core
and module C6 to shallower idle states.
Based on work in the Android copy of the Linux kernel tree,
this feature was disabled
Christopher, the latest kernels don't freeze as much as the older ones.
Do you want me to go back to an older kernel that froze up a lot to test
the intel_idle.max_cstate=1 ?
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Okay i have just removed Vincent's patched kernel. I will try and
proceed and test Christopher's request to follow his steps to test his
stuff.
Vincent i will add that your patch seemed to work well, though i did
have it lock up once. Only once that i can remember though.
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Andrew (keen101):
>"I can remove my current patched kernel and go back to an older one,
but how do i actually enable intel_idle.max_cstate=1 ??"
One may add this temporarily following
https://wiki.ubuntu.com/DebuggingKernelBoot.
>"how do i then compile the debug patch and install that?"
One
ok, i suppose i could. Though i must say that i had avoided trying the
intel_idle.max_cstate=1 as it seemed like a hack rather than a true fix,
though i guess since the root of the problem is a hardware bug a hack is
the best one can hope for.
I can remove my current patched kernel and go back to
Andrew (keen101):
1) In order to better confirm applicability, could you please undo your
WORKAROUND, and test the kernel parameter:
intel_idle.max_cstate=1
what is most helpful is you personally testing this (not relying on
someone else, somewhere else, with some other/similar hardware).
2)
** Description changed:
After upgrading from stock Ubuntu 14.04 to 16.04 my laptop consistently
freezes up and is unresponsive to keyboard or mouse. The only way is to
do a hard shutdown. I'm usually in a browser when this happens, and
often watching a video or two. It seems to happen
Hi Andrew,
That is great to read, thank you for reporting back!
In the mean time, this patch is in the discussion list with some kernel
developers.
It may be that although the patch works, it is not the best way to work around
the issue and it may not even have something to do with the errata
Vincent, i just realized i never reported back! I've been using your
patched kernel ever since my last reply. I don't think i have
experienced even one freeze since then! Thank you for the patch! Yes,
please work on getting this patch into the mainline kernel!
And everyone else please test this
Great! There are many reasons why that is important.
You are right, this is a hardware bug, you can read more on :
https://bugzilla.kernel.org/show_bug.cgi?id=109051
It should have been fixed in the 1.93 bios from Lenovo, but since they
only support Windows, it may have been a combination of that
I guess i will attempt to test your patch since you are so invested in
working on it. I honestly had just given up and decided to live with the
freezing as i had heard it was more of a hardware bug.
I am now running Ubuntu 16.10 Yakkety Yak. The kernels have gotten
better over time and i dont
To facilitate testing, I put up the kernels I compiled on dropbox:
https://www.dropbox.com/sh/c39et4hr6tgp60q/AAC35c56aOEOwkmhjdvtG6dsa?dl=0
Mind that the 4.8.0-30 kernel seems to get updated by the default kernel of the
same version.
If you want to test it, please remove all 4.8.0-30 based
** Tags added: patch
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Title:
[Dell Inspiron 3451] WARNING: CPU: 1 PID: 1297 at /build/linux-lts-
utopic-vy2yyy/linux-lts-
Hi all,
It seems the patch actually fixes the free.
I runn 16.10 now with a patched 4.8.0-30 kernel and I have no freezes yet.
I attached the patch for the 4.8 series, there is a change in it.
Can you please try this on your Bay trail based processors?
The other link is for Cherry trail : to
Seems I forgot to update is. Unfortunately I still get freezes (N3520 Baytrail).
There are some promising developments that seem to actually fix the issue:
see:
https://patchwork.ozlabs.org/patch/704786/
and
https://bugzilla.kernel.org/attachment.cgi?id=241811
It would be great if people have
thank you for sharing. I installed that kernel and again the builtin Broadcom
wireless of my Lenovo Yoga 2 11 is not working, so I use a USB stick.
The performance is amazing!
I played 2 different videos with the soud going over bluetooth (HD profile) and
copied a file and it all ran smoothly
Acer TM (TravelMate) B115M N2930 processor (manufactured on Jully-2014)
Acer TM (TravelMate) B115M N2940 processor (manufactured on Jully-2015)
Acer TM (TravelMate) B117M N3150 processor using SSD (manufactured on
Jully-2016)
Lubuntu 14.04 LTS + LTSEnablementStack
According to comment #139, this looks like a hardware bug. @Andrew,
your suggesting of opening a new bug is probably best, so the different
issues experienced by folks can be uniquely reviewed.
** Changed in: linux (Ubuntu)
Assignee: Joseph Salisbury (jsalisbury) => (unassigned)
** Changed
@jsalisbury
Just wondering if you have a fix for this yet. This bug is still
actively affecting me. Since there has been no input from you or any of
the other kernel developers or other ubuntu bug people for some time
perhaps i should suggest that they all file new bug reports so that at
least
Update from:
https://bugzilla.kernel.org/show_bug.cgi?id=109051
Apparently Intel has released a PDF which explains a hardware bug:
Quote:
> VLP52. EOI Transactions May Not be Sent if Software Enters
> Core C6 During an Interrupt Service Routine
>
> Problem: If core C6 is entered after the
Sorry i typed The same massage twice
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Title:
[Dell Inspiron 3451] WARNING: CPU: 1 PID: 1297 at /build/linux-lts-
Bug still exist in ubuntu 16.04 kernel 4.4.0-38-generic i tryied The
intel_idle.cstate_max=1 is dosnt work
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Title:
[Dell Inspiron
Running ubuntu 16.04 kernel 4.4.0-38-generic tryed The intel_idle.cstate_max=1
It dont work bug still active
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Title:
[Dell Inspiron
I fixed one of the issues I described above by reinstalling Ubuntu with
a swap. Originally I installed it without a swap, with the rationale
that this tiny laptop has only 32GB SSD, which is very little. I
determined that vswapd was killing the CPU, that's why the mouse cursor
was moving so
I am hitting this same issue with an Asus E402MA with Intel N3540
running Ubuntu 16.04.
Setting intel_idle.max_cstate=1 does not help (confirmed it's active in
kernel log), so there could be two different bugs there.
I have two ways in which the bug can be trivially and immediately reproduced:
May will be helpful -
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1490647
The similar old issue.
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Title:
[Dell Inspiron
I have the same bug with an Intel Pentium N3540. It seems to be freezing
the most when I am running hard core programs. If there is any thing I
can do to help let me know.
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Following the guide on https://wiki.ubuntu.com/Kernel/MainlineBuilds I
have installed kernel 4.7.0-040700-generic. The system has currently
been up for 3 days and 5 hours (suspended multiple times) without
freezing. I've not installed Chrome yet.
I noticed the cursor would stutter just before a
4.1.29 seems to be working, at least it didn't freeze for 2 days and
still work now, but intel_idle.max_cstate=1 is enabled. I'll remove it
and see will the system be stable.
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intel_idle.max_cstate=1 didn't help - system hung after 3 hours of
inactivity. Will try 4.1.29 which is the latest from 4.1.x
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Title:
Hi!
I have recently bought ubuntu pc stick PCG02U from MeLE, and struggling with it
since then.
It have z3735f atom processor and 32G eMMC drive.
Originally it was going with ubuntu desktop 14.04 and 3.16 kernel, but it had
problems with some sporadic eMMC errors under high drive load.
Then I
Perhaps it is helpful to report my experiences to this topic. My Hardware: Acer
Travelmate B115 with Pentium N3540, Kingston SSD SV300S37A240G.
One month ago I updated the system from 14.04 to 16.04. I got two problems. The
first was a non working Broadcom WLAN. But this was the simple
Interesting. I doubt that is a coincidence. I am testing now with a
standard hard drive with a fresh install of 16.04. I will report back
soon whether the freezing problems go away or not. Hopefully this will
shed some light on this issue.
But assuming that this might be the case, then one has
Confirmed. All of the systems I see freezing have SSDs.
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Title:
[Dell Inspiron 3451] WARNING: CPU: 1 PID: 1297 at /build/linux-lts-
So i don't know what happened to Joseph as he seems to have gone silent
for quite some time. I assume that means the bisecting is not going
anywhere.
I tried doing a fresh install of 16.04 to see if that would help. It did
not. Currently testing the current upstream intel nightly kernel. And
oh and not sure if relevant but I have this when the install finishes:
update-initramfs: Generating /boot/initrd.img-4.7.0-994-generic
W: Possible missing firmware /lib/firmware/i915/bxt_dmc_ver1_07.bin for module
i915
W: Possible missing firmware /lib/firmware/i915/kbl_dmc_ver1_01.bin for module
I also run that kernel and I cannot make it freeze like before (bluetooth audio
and file transfer).
Running video over wireless plus file transfer and bluetooth with high profile
audio.
The only difference is that I use an USB wireless stick, because the builtin
broadcom doesn't work.
looks
Still using 4.7.0-994-generic. It again isn't freezing. And hasn't in
several weeks. That's not to say that there is not still a problem
there, but it's the best kernel i've tested so far (other than the old
3.16). I think i only had freeing problems when my CPU was hot and my
fan was running
I think we should make an appeal directly to Intel. This problem is NOT
difficult to reproduce! If you turned off login security - I bet we
could make a shell script that launches VLC or something like it to
automate the entire process of testing a new kernel version... without
needing to touch a
@Stephen Gutknecht, it looks like that bug report could be the same.
I am not using the "intel_idle.max_cstate=1" workaround as that is only
a hack of a solution and not designed for long term use. Many with the
same architecture as me and with the same problems have reported that
fix seems to
It's great to see you keep trying this. For clarity, do you consider
this the same bug as https://bugzilla.kernel.org/show_bug.cgi?id=109051
- and is intel_idle.max_cstate=1 working properly for you on a newer
kernel?
This problem is horrific in that the CPU / Motherboard watchdog isn't
catching
It's great to see you keep trying this. For clarity, do you consider
this the same bug as https://bugzilla.kernel.org/show_bug.cgi?id=109051
- and is intel_idle.max_cstate=1 working properly for you on a newer
kernel?
This problem is horrific in that the CPU / Motherboard watchdog isn't
catching
Still testing 4.7.0-994-generic. It again isn't freezing. Perhaps the
time it froze was not because of the main issue. Hard to say, very
confusing. If nothing else i believe it is more stable, but it still has
sporadic freezing problems of some sort.
I've heard reports of even macs having
Never mind. I guess i spoke too soon. Perhaps i just got lucky. But
4.7.0-994-generic does seem to have the bug. I guess going back to the
original commit bisecting is the best option.
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So continuing to test the current Intel nightly build kernel
(4.7.0-994-generic) i have not had my system freeze while watching
videos in a chrome browser.
I will however mention that my system did freeze twice when not in a
browser or watching a video, which goes along with the earlier comment
4.4.13 upstream seems to still freeze.
So far the only upstream kernel that sis not seem to freeze was the
current upsteam nightly intel build. http://kernel.ubuntu.com/~kernel-
ppa/mainline/drm-intel-nightly/
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If this is now fixed in mainline, it might be worth testing the latest
upstream stable 4.4 kernel. It can be downloaded from:
http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.4.13-xenial/
If 4.4.13 upstream stable fixes this bug, then the commit will be
applied to Xenial through the normal
So i tested the next kernel and it looks like it has the bug. But the
funny thing is that i also decided to try the latest upstream kernel and
it looks like the bug has been fixed. At least i haven't seen a freeze
yet. Would be nice if some other people could test to confirm.
bad
Linux
I built the next test kernel, up to the following commit:
81663016dbfd53e29d1b5c5ddbc9b12ae1d66474
The test kernel can be downloaded from:
http://kernel.ubuntu.com/~jsalisbury/lp1575467
Can you test that kernel and report back if it has the bug or not? I
will build the next test kernel based on
It's worth a lot. We can use this workaround until the bug has been
fixed. Thanks for the tip!
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Title:
[Dell Inspiron 3451] WARNING:
For what it's worth, if this is the only bug withholding you and it's
exactly this bug you should be fine by supplying the
intel_idle.max_cstate=1 kernel boot parameter. The machines will consume
more power however.
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Confirming problem exactly as described in original description. Freezes are
frequently triggered by video playback in browsers, but also in normal browser
use. Chrome and other browsers using the Blink rendering engine (like Opera)
trigger freezes much more often than firefox. But regularly I
@Joseph Salisbury, any progress on the bisecting?
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Title:
[Dell Inspiron 3451] WARNING: CPU: 1 PID: 1297 at /build/linux-lts-
692a59e696afe1a4e777d0e4359325336ab0ad89 / 4.1 rc6 seems to have the
bug. When streaming a video online (like i test with all of them this
one froze within 5 min.
@Joseph Salisbury, ready for the next commit to test.
@mrvanes, yes i've read that bug report before. And yes there is a lot
of
I seem to have the same problem on an Acer ES1-311 notebook with the N3540 Bay
Trail CPU.
I have just tried the newest test kernel from Joseph Salisbury (up to commit
692a59e696afe1a4e777d0e4359325336ab0ad89) but it froze after approx. 2 hours.
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Could you all please read up on
https://bugzilla.kernel.org/show_bug.cgi?id=109051
I know it's a long read, but we're chasing the same bug and duplicating
a LOT of effort. BzukTuk for example found the 4.2.0 commit
8fb55197e6... on februari 1 2016. But the problems started around 3.16
and
@Richard, I'll review your bisect log and see if we are getting the same
results.
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Title:
[Dell Inspiron 3451] WARNING: CPU: 1 PID:
I built the next test kernel, up to the following commit:
692a59e696afe1a4e777d0e4359325336ab0ad89
The test kernel can be downloaded from:
http://kernel.ubuntu.com/~jsalisbury/lp1575467
Can you test that kernel and report back if it has the bug or not? I
will build the next test kernel based on
Joseph, commit 3d9f96d850e4bbfae24dc9aee03033dd77c81596 seems to be
good. Ready for the next one.
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Title:
[Dell Inspiron 3451]
BzukTuk 2016-02-01 22:06:32 UTC
Created attachment 202701 [details]
Kernel bisection between v4.2 v4.1 for sudden freezes
Hi, small update.
My first bisect was from 4.1 to 4.2-rc1 and as first bad commit
[cf5d8a46a001c9421c7397699db55f962e0410fc] was flagged. But I was not so
sure that i did
I built the next test kernel, up to the following commit:
3d9f96d850e4bbfae24dc9aee03033dd77c81596
The test kernel can be downloaded from:
http://kernel.ubuntu.com/~jsalisbury/lp1575467
Can you test that kernel and report back if it has the bug or not? I
will build the next test kernel based on
https://www.phoronix.com/scan.php?page=news_item=Intel-Linux-Bay-
Trail-Fail
If you fix this, you will be heroes.
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Title:
[Dell
Perfect. This is an upstream bugreport site:
https://bugzilla.kernel.org/show_bug.cgi?id=109051
There are a lot of informations there. Is this the same thing?
** Bug watch added: Linux Kernel Bug Tracker #109051
http://bugzilla.kernel.org/show_bug.cgi?id=109051
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yup, commit 8d7804a2f03dbd34940fcb426450c730adf29dae has the bug.
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[Dell Inspiron 3451] WARNING: CPU: 1 PID: 1297 at
okay, just tested it. commit 8d7804a2f03dbd34940fcb426450c730adf29dae
seems to have the bug!
andrew@andrew-Inspiron-3451:~$ uname -a
Linux andrew-Inspiron-3451 4.1.0-040100-generic #201605230749 SMP Mon May 23
12:55:56 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
BAD
Will test again to make sure.
I built the next test kernel, up to the following commit:
8d7804a2f03dbd34940fcb426450c730adf29dae
The test kernel can be downloaded from:
http://kernel.ubuntu.com/~jsalisbury/lp1575467
Can you test that kernel and report back if it has the bug or not? I
will build the next test kernel based on
@Richard Baka,
Yes there will be an official fix for this. We are now in the process
of performing a kernel bisect to identify the commit that introduced
this regression. Once we know the commit, we can decide the next steps
to fix the bug.
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*Is it possible that an official fix will be released for this?
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Title:
[Dell Inspiron 3451] WARNING: CPU: 1 PID: 1297 at
Hi Joseph Salisbury
Are you an ubuntu kernel maintainer? I can't believe there is somebody
who tries to solve this problem. First time this was reported on
freedesktop 1.5 years ago but nobody cared about it. Is it possible that
there will be released an official fix for this?
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commit 4570a37169d4b44d316f40b2ccc681dc93fedc7b seems to work fine.
Ready for the next one.
(Linux andrew-Inspiron-3451 4.1.0-040100-generic #201605200845 SMP Fri
May 20 13:16:53 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux)
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I started a kernel bisect between v4.1 final and v4.2-rc1. The kernel
bisect will require testing of about 7-10 test kernels.
I built the first test kernel, up to the following commit:
4570a37169d4b44d316f40b2ccc681dc93fedc7b
The test kernel can be downloaded from:
Ok. Confirmed again. 4.1 does not appear to have problems when testing.
4.2-rc1 has problems nearly immediately. Ready for further help in
bisecting and narrowing down the problem.
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Sure. I think those are the ones i tested before, but i'd be happy to
test them again. Yeah, best to make sure to start at the right point. I
will report back with the results as soon as i'm able.
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If possible, can you test those two kernels? That way we know we are
starting the bisect at the right point. The kernels can be downloaded
from:
v4.1: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.1-wily/
v4.2-rc1: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.2-rc1-unstable/
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Thanks that would be very helpful! I think so, last time i checked that
seemed to be the case. But i can't say for sure exactly. I'm on a 64bit
system.
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I can build the kernel for this bisect and post them. Just to confirm,
v4.1 is the last good kernel and v4.2-rc1 is the first bad kernel?
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** Changed in: linux (Ubuntu)
Status: Incomplete => In Progress
** Changed in: linux (Ubuntu)
Assignee: (unassigned) => Joseph Salisbury (jsalisbury)
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Does anyone know how to do the bisecting? The instructions at the above
link that christopher provided are helping, but not a complete
walkthrough. I'm trying my best to muddle along. I have successfully
cloned the ubuntu-wily kernel repo and i've successfully started the git
bisect process. It
Pending
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1575467/comments/53
.
** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
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I having trouble cloning the whole git repository as it's about 2gb in
size. Once it's cloned i guess git bisect can help narrow down which
commit was the first bad one.
http://kernel.ubuntu.com/git/ubuntu/ubuntu-wily.git
But i assume there was some sort of error in the logs i originally
I found a possible bug report that may help us. It specifically
identifies problems with Kernel 4.2 and hard system freeze.
https://bugs.freedesktop.org/show_bug.cgi?id=93214
Specifically note comment #11 on that bug report: "I added
"intel_idle.max_cstate=1" to the cmdline in hrub [grub]
http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.2-rc1-unstable/CHANGES
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Title:
[Dell Inspiron 3451] WARNING: CPU: 1 PID: 1297 at
Well Stephen, Christopher had me try several upstream kernels. I might
be mistaken, but i believe those upstream kernels are the ones that are
released to other linux distros as well.
Your right, it is very odd that a blinking kernel panic does not happen
or any other errors. This last time i had
Looking at the big picture: What concerns me most about this bug is the
way it deadlocks all of Linux. The console does not respond, there is no
normal crash dump, etc.
My thoughts are: We could try a non-Ubuntu kernel? One compiled from
source or another distro. And see if there are open bugs
** Tags added: wily
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Title:
[Dell Inspiron 3451] WARNING: CPU: 1 PID: 1297 at /build/linux-lts-
utopic-vy2yyy/linux-lts-
Stephen, i have no idea where that info came from. It seems someone has
changed the title of my bug. When this happened or for what purpose i
don't know. I don't even know if that information is accurate. It seems
to match my processor though..
The original title of my bug was: [Bug 1575467]
Back to your very first comment / the title of this bug. How did you
identify the "drivers/gpu/drm/i915/intel_display.c:1743
vlv_wait_port_ready" in the crash? Are you able to get that driver to
be identified with each crash - or only sometimes?
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Stephen, good to hear. Sounds like we are on the right track. I would
agree.
Currently testing 4.1.23 which is the last in the 4.1.x line and it
seems stable. I will now attempt to see if i can test any of the
releases in between. I will try 4.1.5 first if i can. The odd thing
about all the ones
Andrew (keen101): that pretty much confirms my experience reported in
comment #67 - that kernel 4.1.x is the newest one that doesn't deadlock
- and I'm on a different system from your Dell (Acer and HP systems,
pure Intel GPU and CPU).
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I've been using the http://kernel.ubuntu.com/~kernel-ppa/mainline/ to
test and narrow down which kernels are good and where the bug was
introduced. I'm not sure i'm following the protocol for the bisect stuff
exactly, but so far my narrowing has produced these preliminary results.
I am testing 4.1
Removing virtualbox didn't help. Had it freeze today on the login screen
at startup.
Ok...i guess the last thing to do is to figure out how to do the commit
bisect from kernel 3.16.0-70-generic to 4.4.0-21.37-generic in order to
identify the last good kernel commit, followed immediately by the
Found a newer working kernel: Linux 4.1.23-040123-generic #201604281334
SMP Thu Apr 28 17:37:02 UTC 2016 x86_64 is GOOD! But
4.2.8-040208ckt9-generic fails (Ubuntu 15.10 kernel). Every kernel I
have tried that is newer, freezes on Netflix via Chrome in under 2
hours.
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You received this bug
Stephen Gutknecht, unfortunately, making comments on a report you didn't
file claiming some sort of similarity doesn't help here.
What would be helpful though, is if you filed a new report with the Ubuntu
repository kernel (not mainline/upstream) via a terminal:
ubuntu-bug linux
Please feel
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