sorry I'm running KDE neon, and they don't let me install apport without
breaking neon-apport, which I'd prefer not do. But I can send any info
you wish
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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Public bug reported:
When I start my laptop with AC plugged in, the CPU frequency oscillates around
1.5Ghz, but as soon as I plug some USB device, like an external mouse, the
frequency goes up to the max (3.2Ghz) and stays there, even though the system
monitor tells me that no app is eating
running 5.3.0-52-generic for a couple of weeks I still have occasional hangs,
maybe not triggered by the same things. It seems for instance to happen when I
open a PDF from within chromium-browser.
It lasts 3-4 seconds.
[12467.199744] perf: interrupt took too long (2520 > 2500), lowering
@arighi
It's graphical demo using openGL via SDL1.2 where 1000 small discs move around
and all collisions are detected, and print FPS. It uses both CPU and GPU quite
heavily. (On my XPS 13 9350, intel_gpu_top reports about 55% GPU usage, and top
reports 46% CPU). I was developing this for my
@arighi
I cannot test with glxgears because it syncs with screen refresh, so always
60FPS.
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https://bugs.launchpad.net/bugs/1872001
Title:
5.3.0-46-generic - i915 -
@Andrea, for me this seems to solve the problem. Thanks!
(except that my demo is still slightly slower than with 4.4.0 (13fps
instead of 15fps) but this is probably unrelated)
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So, this problem is serious.
I am surprised that no one else has mentioned the coil noise issue.
I can repeatedly and consistently hear it on 5.3.0-46, while it's absent in
5.3.0-45.
I think this is the sign of something quite bad happening. (maybe too much data
transiting on the bus between cpu
and 50% faster on 4.4.0 :(
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Title:
5.3.0-46-generic - i915 - frequent GPU hangs / resets rcs0
Status in linux package in Ubuntu:
interestingly, my demo runs also 25% faster on 5.3.0-45 than on
5.3.0-46...
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Title:
5.3.0-46-generic - i915 - frequent GPU hangs /
OK here is a new version, I think now you just need to do
sudp apt install libsdl-ttf2.0-0
./test.exe
it should work
** Attachment added: "test.exe"
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I'm sorry I realized you need more dependencies to run my test program,
it's going to be complicated.
But I think any program that intensively sends data to the GPU should
trigger the problem as well
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I agree, it seems exactly the same as bug #1872009
I have uploaded a test program (needs SDL1.2) that kind of immediately triggers
the hang
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1872009/+attachment/5352362/+files/test.exe
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*** This bug is a duplicate of bug 1872001 ***
https://bugs.launchpad.net/bugs/1872001
you're right, it seems to be exactly the same bug.
I am attaching my test program (binary: you need the SDL library, and maybe
more)
./test.exe
it will open a graphics window and run a simulation of
I first posted in https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1861395
because I thought it was related
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Title:
System
** Attachment added: "lspci-vnvn.log"
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Public bug reported:
* The problem started with linux kernel 5.3.0-46
* When the screen (GPU?) is used intensively, I can hear coil noise from my
laptop (Dell XPS 13)
and then the whole system will freeze during 5-6 seconds. During freeze I can
move the mouse cursor, but nothing else is
** Attachment added: "dmesg.log"
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@oded, thanks for the message!
Maybe it's a different bug, however I think that the bug is still very close.
If you look at the original poster's dmesg output, you see that the freezes
(reported by the "hang" message) also occur multiple times.
The only difference is that the frequency is about
Here is an interesting observation (I think). I have a demo program that
makes strong use of the GPU. Here is what happens with two close kernel
versions:
* 5.3.0-45-generic
=> everything ok, no hang, no noise
* 5.3.0-46-generic
=> I CAN HEAR COIL NOISE when running the demo! And the whole
I have the same issue here, random freeze, espacially when working hard
on the video card.
I'm a bit worried because they claim here that 5.4.0 does not solve it
https://bugzilla.kernel.org/show_bug.cgi?id=205545
** Bug watch added: Linux Kernel Bug Tracker #205545
another way to "fix" the bug is to suspend/resume.
Indeed, after resume, the false device is removed.
$ tail -n 3 /var/log/Xorg.0.log
(EE) SynPS/2 Synaptics TouchPad: Read error 19
[ 285.414] (II) config/udev: removing device SynPS/2 Synaptics TouchPad
[ 285.430] (II) UnloadModule:
Hi Joe. I've just tested the latest kernel, but
the bug is not fixed in 4.7.0-040700rc3-generic
(same behaviour)
** Tags added: kernel-bug-exists-upstream
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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** Description changed:
This is on a Dell XPS 13 9350 DE running ubuntu 16.04.
This laptop has a touchpad and a touchscreen.
I'm reporting here about the touchpad.
One can see from Xorg.0.log and "xinput list" that *two* touchpads are
registered by the system
one is called
I think this is a regression:
I've just tested a live USB Linux Mint 17.3 cinnamon (based on ubuntu 14.04)
and there the touchpad is not duplicated.
only "SynPS/2 Synaptics TouchPad"
is reported by the system
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** Attachment added: "CurrentDmesg.txt"
https://bugs.launchpad.net/bugs/1591669/+attachment/4682120/+files/CurrentDmesg.txt
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** Attachment added: "IwConfig.txt"
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ABOUT THE LOGS:
I'm sorry I'm not used to reporting bugs.
After I received the email telling me to "apport-collect 1591669"
I did it, but then I realized I had already implemented the "fix"...
So I have removed the fix, rebooted, and re-run "apport-collect 1591669"
===> you may ignore #2 -- #14
apport information
** Attachment added: "CRDA.txt"
https://bugs.launchpad.net/bugs/1591669/+attachment/4682119/+files/CRDA.txt
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https://bugs.launchpad.net/bugs/1591669/+attachment/4682147/+files/WifiSyslog.txt
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** Attachment added: "ProcInterrupts.txt"
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** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
** Description changed:
This is on a Dell XPS 13 9350 DE running ubuntu 16.04.
apport information
** Attachment added: "UdevDb.txt"
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apport information
** Tags added: apport-collected xenial
** Description changed:
This is on a Dell XPS 13 9350 DE running ubuntu 16.04.
This laptop has a touchpad and a touchscreen.
I'm reporting here about the touchpad.
One can see from Xorg.0.log and "xinput list" that *two*
Public bug reported:
This is on a Dell XPS 13 9350 DE running ubuntu 16.04.
This laptop has a touchpad and a touchscreen.
I'm reporting here about the touchpad.
One can see from Xorg.0.log and "xinput list" that *two* touchpads are
registered by the system
one is called "DLL0704:01 06CB:76AE
this is just a reminder that the problem is still present with the
latest ubuntu kernel 3.16.0-29-generic.
bisecting is not completely obvious to me, so I didn't have the time to look
into it yet.
I just tested the precompiled kernels available in
so my conclusion is that
* it works with 3.13.0-16.36
* it is broken in 3.13.0-17.37
what should I do next ?
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Title:
[Dell XPS 13
I think I found what triggers the error (of course, this is just the
manifestation of the error, maybe not the root cause):
from 3.13.0-17.37 a limited number of retries has been introduced, which
fails after 7 retries; this seems to be not enough:
---
@Aldo
3.13.0-12.32 seems to work for me. So what you can do:
* download 4 packages in a new directory: (if you have a 64 bits system)
https://launchpad.net/ubuntu/+source/linux/3.13.0-12.32/+build/5624936/+files/linux-headers-3.13.0-12-generic_3.13.0-12.32_amd64.deb
** Changed in: linux (Ubuntu)
Status: Expired = Incomplete
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Title:
[Dell XPS 13 (L321X)] External monitor does not wake up
I'm progressing slowly in my dissection:
3.13.0-17.37: BAD
3.13.0-7.26: GOOD (but issue with USB sound card)
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Title:
[Dell XPS 13
I still have the same problem with kernel 3.13.0-35
I'm sorry, I didn't have the time to bisect; this is my work laptop and it's
not so easy to install many kernels.
The tests I did:
3.12.0-031200: GOOD
3.13.0-24: BAD after 5 sleep/wake up
3.15.0-031500rc8: BAD after 1 sleep/wake up
Christopher,
I have upgraded to 3.15-rc8, but the problem is still there.
uname -a
Linux pr036037 3.15.0-031500rc8-generic #201406012235 SMP Mon Jun 2 02:36:11
UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
dmesg output =
[...]
488.947955] cfg80211: (5724 KHz - 6588 KHz @ 216 KHz),
I confirm that this bug (same as #779159)
happens sytematically on my laptop running ubuntu 12.04 LTS (with up-to-date
upgrades)
and that it seems to be solved by reverting to older firmware
iwlwifi-4965-ucode-228.57.2.23
as suggested by
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