Public bug reported:
After today's upgrade to Ubuntu 16.04 Wifi is not working any longer.
Networks are not seen, and the wireless network indicator icon is
"empty".
The Wifi worked just fine with 14.04 before the upgrade, and it also
works in the Windows 10 Boot of this computer.
I've run the
Additional information: let me attach a screenshot of the networking
indicator icon menu: Below 'Wifi networks' it says 'device not ready'
(in Finnish: 'Wifi-verkot', 'laite ei valmis').
** Attachment added: "Screenshot: device not ready"
Still there, 4.10-rc5
** Tags removed: kernel-bug-exists-upstream-4.9-rc8
** Tags added: kernel-bug-exists-upstream-4.10-rc5
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https://bugs.launchpad.net/bugs/1618550
Title:
Thanks for your response. Just tested with the latest upstream kernel
rc2-generic_4.8.0 and the bug is still there.
Also with this version I noticed that sometimes booting with the
Ethernet cable connected wakes up Wifi as well, but this is not 100 %
repeatable. Without the cable I cannot
Suspend / resume issue still exists in 4.8-rc4. After resume, display
goes to login screen that looks normal except for missing wireless
status indicators. I was able to type in my password but the GUI froze
shortly after.
Please check that my bug tag and status changes are correct.
** Tags
Thanks for letting me know that a new bios version is available (oddly
the HP support site did not show any available bios versions for my
laptop with 'Windows 10' setting, but F39 and F18 were available by
setting OS to 'Windows 8.1').
Unfortunately the bios update does not solve the problem
Here's /var/log/Xorg.0.log file - not from SSH but from normal boot
after resume, using 4.8-rc4
** Attachment added: "/var/log/Xorg.0.log"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1618550/+attachment/4734016/+files/Xorg.0.log
** Changed in: linux (Ubuntu)
Status:
Here is the output of the sudo cat /sys/kernel/debug/suspend_stats
command after taking the steps from
https://wiki.ubuntu.com/DebuggingKernelSuspend
success: 0
fail: 0
failed_freeze: 0
failed_prepare: 0
failed_suspend: 0
failed_suspend_late: 0
failed_suspend_noirq: 0
failed_resume: 0
If you are referring to the '"resume-trace" debugging procedure for
finding buggy drivers', I'm still evaluating if this is beyond my
skills.
In particular I don't understand this paragraph:
"Caveat Emptor: Using the following debug suggestions will radically
change the values in your RTC chip,
Good news - I removed my WLAN dongle to test with the built-in WLAN
again and I cannot reproduce this bug with 4.8-rc4. Strangely enough I
also cannot reproduce it with 4.4.0-34 or 4.4.0-36 either. Either the
bug has been fixed by an update outside the kernel or it is hiding.
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You received
Public bug reported:
My HP notebook won't wake from suspend with 16.04 LTS, waited for the
latest 4.4.0-36 kernel update before reporting this bug. Computer goes
to suspend, but attempts to wake it up just start the fan (and HDD)
while the display remains black.
Also tested this with the
Here's the information from the sticker:
Product: J2U45EA#UUW
Serial: CND4250FMY
Model: 15-r085noRev: 2212-100
Hope this helps.
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https://bugs.launchpad.net/bugs/1613437
This issue did not appear after an update/upgrade - I recall having it
also with 14.04 LTS where I ended up never suspending the laptop (never
reported a bug myself before, though). Now my usage profile has changed
and suspend/resume is important.
To the upstream question - unfortunately this
Here is a summary of the information that I can provide:
1. Which part of the process does the issue occur with, the suspend to ram, or
resuming from?
Please advise how you suspended specifically. For example:
Issue occurs when resuming.
I have suspended using the following methods: i)
Tested with 4.8-rc8. It was possible to login after the resume and use
the GUI in offline mode for several minutes. Two observations: 1) Wifi
and networking are not available after resume, 2) Ubuntu hangs when
selecting "Shut down" from the menu.
Could this issue be related to the RT3290 wireless
Like discussed on Sep 9 in this same thread, creating the kernel resume
trace file fails
$ sudo sh -c "sync && echo 1 > /sys/power/pm_trace && pm-suspend"
sh: 1: cannot create /sys/power/pm_trace: Permission denied
Please help me solve the "Permission denied" error to enable tracing in
steps
Tested with mainline kernel 4.9-rc3 and the bug still exists.
Like discussed on Sep 9 in this same thread, creating the kernel resume
trace file fails
$ sudo sh -c "sync && echo 1 > /sys/power/pm_trace && pm-suspend"
sh: 1: cannot create /sys/power/pm_trace: Permission denied
Please help me
Still there in upstream 4.9-rc8
** Tags removed: kernel-bug-exists-upstream-4.9-rc3
** Tags added: kernel-bug-exists-upstream-4.9-rc8
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Repeatable in 4.11-rc6, and I'm yet to receive guidance to the tracing
problem discussed above. Have also asked for support in different forums
with no results.
** Tags removed: kernel-bug-exists-upstream-4.10-rc5
** Tags added: kernel-bug-exists-upstream-4.11-rc6
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Please find my replies below:
1. I'm seeing various issues after suspend / resume. With the latest
kernel builds, typical is that the GUI freezes shortly after resume.
Often resume does not complete at all and I only see black screen with a
cursor / underscore in the top left corner. I would be
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