Current xenial linux-image-4.4.0-62-generic remains broken, with dmesg
WARNs on CRTC clocks and then system hangs when switching user sessions
(which invokes some gnome-session xrandr setup). Lost the exact dmesg on
the system hang.
Current mainline 4.8.x (4.8.17-040817-generic) continues to behav
I've had good enough experiences with mainline 4.8.15 at this point that
I would consider this bug fixed in linux 4.8.x; it's still not perfect
(have to typically play around with xrandr and maybe undock/dock), but
external 4k DP monitor via a ThinkPad dock works fairly reliably now.
OTOH I was un
I've been running the 4.8.x mainline release kernels recently, and had
some success with 4k DP connected to the dock. It doesn't always work,
but a reboot fixes it, until it breaks again.
I'd appreciate advice for debugging this, it's pretty reproducible, but
typically when it happens I don't exac
I've been having more luck with the newer 4.7 and 4.8 kernels, and using
a 4k monitor on the integrated DP connector mostly works okay at 60Hz.
Haven't really noticed any difference in stability with the
xorg.conf.d/20-intel.conf settings in https://github.com/linuxenko
/ubuntu-skylake-i915-video-
You can try the mainline 4.8-rc builds here:
http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.8-rc4/
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https://bugs.launchpad.net/bugs/1567417
Title:
WARN_ON(!wm_changed) s
I found a couple existing bugs in the freedesktop.org tracker that might
be related, all marked as fixed in recent nightlies:
https://bugs.freedesktop.org/show_bug.cgi?id=96714
https://bugs.freedesktop.org/show_bug.cgi?id=95498
https://bugs.freedesktop.org/show_bug.cgi?id=94822
https://bugs.freede
I can confirm that linux-image 4.7.0-994-generic_4.7.0-994.201607052202
from http://kernel.ubuntu.com/~kernel-ppa/mainline/drm-intel-
nightly/2016-07-06/ behaves much better.
DP hotplug/unplug behaves correctly across text console, VT switch to
lightdm and login into Unity. There's still some WARN
And no upgrades or prior working versions, this is a fresh Ubuntu 16.04
install on a newly purchased X260 laptop.
** Description changed:
Running Ubuntu 16.04 on a Lenovo ThinkPad X260 with Intel Skylake HD
Graphics 520, connecting an external monitor to the DisplayPort
connector causes the
As per the description, I have tested this with 4.4.0-28-generic as well
as mainline 4.6.3-040603-generic and 4.7.0-040700rc5-generic; they all
hang in a similar fashion.
In fact, the journal output I attached was from the 4.7 kernel, I
renamed the attachment accordingly: ubuntu16-04_linux4.7.0-0
Note that compared to #1559308 , connecting the same monitor via the
HDMI port on the laptop running 4.4.0-28-generic does seem to work fine:
There's still some stuff in dmesg when using HDMI as well:
snd_hda_codec_hdmi hdaudioC0D2: HDMI: ELD buf size is 0, force 128
snd_hda_codec_hdmi hdaudioC0D
Public bug reported:
Running Ubuntu 16.04 on a Lenovo ThinkPad X260 with Intel Skylake HD
Graphics 520, connecting an external monitor to the DisplayPort
connector causes the system to quickly hang. The system stops responding
to network pings, cannot switch consoles, and needs a hard reboot.
The
Yes, I can confirm that the trusty-proposed 3.13.0-38 kernel resolves
this issue. The dnsmasq-tftp transfer succeeds in my test environment
without any of the symptoms that were present with the trusty-
updates/security kernels between -30 and -37, nor do I notice any
regressions in my (IPv4) ipvs
ACK
3.13.0-35-generic #62~lp1349768v5v201408250842 appears to resolve the
issue completely on my actual test setup as well. No TFTP stalls,
dnsmasq EPERM errors or dmesg errors, and ftrace doesn't show any calls
to ipv6_find_hdr.
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NAK
Unfortunately no, the 3.13.0-35-generic #62~lp1349768v4v201408220857
from above continues to exhibit the same issues with my actual test
setup. Same thing with the ./lp1349768.sh testcase.
The 0041-ipvs-fix-ipv4-issues-in-ip_vs_out.patch in the lp1349768v4
build is a different patch, though?
Attached is a small script to setup dnsmasq-tftp and ipvs to reproduce
the dnsmasq-tftp stall. The strace at the end should start showing
sendto() = EPERM errors after running the curl tftp://.../ command given
as an example from a remote host.
The exact contents of the ipvs rules don't seem to ma
NAK
Linux 3.13.0-35-generic #62~lp1349768v3v201408191448 still exhibits the
same symptoms (stalled dnsmasq-tftp transfer and "IPv6 header not found"
messages). Unloading the ip_vs module clears the issue.
I'll attempt to work out a minimal reproducer.
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The utopic kernel appears to be affected as well. Booting the same
Ubuntu 14.04 machine into the Linux 3.16.0-6-generic #11-Ubuntu kernel
installed from
https://launchpad.net/ubuntu/+source/linux/3.16.0-6.11/+build/6217368
gives identical symptoms, i.e. dnsmasq-tftp stalls, dmesg reports "IPv6
ACK
I can confirm that this issue is no longer present with the Linux
3.13.0-33-generic #58~lp1349768v2v201407300928 kernel as installed from
above. Rebooting into the given kernel results in dnsmasq-tftp transfers
working fine, and no related dmesg errors occur.
Apologies for the delay. I was aw
NACK
The same faulty behaviour persists with linux-
image-3.13.0-33-generic=3.13.0-33.58~lp1349768v201407290941 (uname
3.13.0-33-generic #58~lp1349768v201407290941).
I do not notice any difference; identical symptoms. `rmmod ip_vs_rr
ip_vs` continues to immediately resolve the fault.
Note that m
apport information
** Attachment added: "IwConfig.txt"
https://bugs.launchpad.net/bugs/1349768/+attachment/4165027/+files/IwConfig.txt
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apport information
** Attachment added: "ProcInterrupts.txt"
https://bugs.launchpad.net/bugs/1349768/+attachment/4165031/+files/ProcInterrupts.txt
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apport information
** Attachment added: "CurrentDmesg.txt"
https://bugs.launchpad.net/bugs/1349768/+attachment/4165025/+files/CurrentDmesg.txt
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apport information
** Attachment added: "Lsusb.txt"
https://bugs.launchpad.net/bugs/1349768/+attachment/4165029/+files/Lsusb.txt
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apport information
** Attachment added: "Lspci.txt"
https://bugs.launchpad.net/bugs/1349768/+attachment/4165028/+files/Lspci.txt
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apport information
** Attachment added: "WifiSyslog.txt"
https://bugs.launchpad.net/bugs/1349768/+attachment/4165035/+files/WifiSyslog.txt
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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apport information
** Attachment added: "Dependencies.txt"
https://bugs.launchpad.net/bugs/1349768/+attachment/4165026/+files/Dependencies.txt
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apport information
** Attachment added: "UdevLog.txt"
https://bugs.launchpad.net/bugs/1349768/+attachment/4165034/+files/UdevLog.txt
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apport information
** Attachment added: "ProcCpuinfo.txt"
https://bugs.launchpad.net/bugs/1349768/+attachment/4165030/+files/ProcCpuinfo.txt
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apport information
** Attachment added: "ProcModules.txt"
https://bugs.launchpad.net/bugs/1349768/+attachment/4165032/+files/ProcModules.txt
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Reported apport-collect information against package linux-
image-3.13.0-32-generic, reproducing the dnsmasq-tftp issue with a
remote client pxebooting and stalling.
The CurrentDmesg contains the symptom message at 1214.740931
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apport information
** Attachment added: "UdevDb.txt"
https://bugs.launchpad.net/bugs/1349768/+attachment/4165033/+files/UdevDb.txt
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apport information
** Tags added: apport-collected trusty
** Description changed:
I have an Ubuntu 14.04 host that I am using as both a keepalived/ipvs
loadbalancer and dnsmasq server for pxebooting servers.
After updating linux-image 3.13.0-29.53 -> 3.13.0-32.57 I noticed that
dnsmas
Apologies, misfiled initially on biosdevname, I meant to file on the
linux-image package source.
** Description changed:
I have an Ubuntu 14.04 host that I am using as both a keepalived/ipvs
loadbalancer and dnsmasq server for pxebooting servers.
- After updating linux-image 3.13.0-30.55 -
Public bug reported:
I have an Ubuntu 14.04 host that I am using as both a keepalived/ipvs
loadbalancer and dnsmasq server for pxebooting servers.
After updating linux-image 3.13.0-29.53 -> 3.13.0-32.57 I noticed that
dnsmasq-tftp stopped working. pxeboot clients would hang on the "Loading
/l
*** This bug is a duplicate of bug 1281964 ***
https://bugs.launchpad.net/bugs/1281964
Confirm that updating to linux-firmware 1.79.10 from precise-updates
resolves this, giving me a functional phy0 on 3.11.0-17-generic.
$ apt-cache policy linux-firmware
linux-firmware:
Installed: 1.79.10
*** This bug is a duplicate of bug 1281964 ***
https://bugs.launchpad.net/bugs/1281964
Workaroud: Boot with Shift held down, and select older 3.11.0-15 linux
version in grub.
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Public bug reported:
The latest precise-updates linux-image seems to omit the required
iwlwifi-7260-7.ucode firwmware
03:00.0 Network controller: Intel Corporation Wireless 7260 (rev 83)
$ dpkg -l linux-image-3.11*
ii linux-image-3.11.0-14-generic 3.11.0-14.21~precise1
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