Rudolf Leitgeb, this bug report is being closed due to your last comment
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1584533/comments/13
regarding this being fixed with an update. For future reference you can
manage the status of your own bugs by clicking on the current status in
the
In the mean time, there was a linux kernel upgrade in Ubuntu 16.04, and
whatever that kernel changed, I have not had connection failure ever
since. I would therefore cautiously mark this issue resolved for now.
About the suggested BIOS upgrade: there appears to be something messed
up on Lenovo's
Rudolf Leitgeb, it appears you installed a slightly older version
(1.40), in comparison to the latest (1.42). Could you please advise?
** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
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PS: Just marked this bug "Status confirmed" as per your request.
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https://bugs.launchpad.net/bugs/1584533
Title:
Lenovo X220 unable to wlan after resume from sleep
Status
Dear Christopher, thanks for your feedback. Following your suggestion I
upgraded to the latest BIOS version provided by Lenovo, here is the
output from this 'sudo dmidecode -s bios-version && sudo dmidecode -s
bios-release-date' line:
8DET70WW (1.40 )
05/14/2015
Sadly, there was no improvement
Rudolf Leitgeb, as per http://support.lenovo.com/us/en/products/Laptops-
and-netbooks/ThinkPad-X-Series-
laptops/ThinkPad-X220?tabName=Downloads=Mast:SubNav:Support:Drivers%20and%20Software|Drivers%20and%20Software=false
an update to your computer's buggy, insecure, and outdated BIOS is
available
** Attachment added: "dmesg file created with mainline kernel: reboot,
sleep/wakeup + working wlan, sleep/wakeup + broken wlan"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1584533/+attachment/4669693/+files/dmesg-flaky-mainline
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Thanks for your reply, before I followed your recommended steps I did a
system upgrade as recommended by ubuntu update manager. Since this also
updated systemd which is AFAIK pretty basic to the system, I tested both
after the upgrade AND after the switch to this mainline kernel you
recommended.
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
** Attachment added: "dmesg right after wakeup from sleep"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1584533/+attachment/4668316/+files/dmesg-pastwakeup
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** Attachment added: "syslog snippet from right after wakeup from sleep"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1584533/+attachment/4668318/+files/syslog-pastwakeup
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** Attachment added: "syslog snippet from right after reboot"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1584533/+attachment/4668317/+files/syslog-pastreboot
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