Suspend doesn't work in ACER laptop

[Juan Carlos Amengual]

I bought this laptop three years ago. Used Kubuntu 14.04 and 15.04 without **any** problem. A couple of weeks ago I installed Kubuntu 16.04 as always (formatting /root partition and doing a fresh install, not an upgrade). Since then both suspend and hibernation hang the laptop: the screen goes black, the laptop seems to stop but it won't. After a couple of minutes the fan can be heard and there is no way to restart linux. I have to power off the laptop (the hard way) and then turn it on. I have followed some threads and it seems that this is a common bug (it happens in several different hardware configurations). The original 4.4.0-22-generic kernel has been updated to versions 23 and 24 (current) but no way. The bug is still present. Thanks a lot in advance!

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-24-generic 4.4.0-24.43
ProcVersionSignature: Ubuntu 4.4.0-24.43-generic 4.4.10
Uname: Linux 4.4.0-24-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: jcamen 1409 F.... pulseaudio
 /dev/snd/controlC0: jcamen 1409 F.... pulseaudio
CurrentDesktop: KDE
Date: Fri Jun 24 16:07:20 2016
HibernationDevice: RESUME=UUID=17e78447-07a8-4fbb-9f86-955840d83074
InstallationDate: Installed on 2016-06-06 (18 days ago)
InstallationMedia: Kubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
MachineType: Acer Aspire V5-552G
ProcFB: 0 radeondrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-24-generic.efi.signed root=UUID=92ac6050-61ef-4135-b375-623a96d7f33d ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-4.4.0-24-generic N/A
 linux-backports-modules-4.4.0-24-generic N/A
 linux-firmware 1.157.1
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/28/2013
dmi.bios.vendor: Insyde Corp.
dmi.bios.version: V2.04
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: Dazzle_RL
dmi.board.vendor: Acer
dmi.board.version: Type2 - A01 Board Version
dmi.chassis.type: 10
dmi.chassis.vendor: Chassis Manufacturer
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnInsydeCorp.:bvrV2.04:bd08/28/2013:svnAcer:pnAspireV5-552G:pvrV2.04:rvnAcer:rnDazzle_RL:rvrType2-A01BoardVersion:cvnChassisManufacturer:ct10:cvrChassisVersion:
dmi.product.name: Aspire V5-552G
dmi.product.version: V2.04
dmi.sys.vendor: Acer

[Juan Carlos Amengual (jcamen-lsi)]

I think this bug is closely related to:

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1566302

and, more recent:

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1589139

[Brad Figg (brad-figg)]

This change was made by a bot.

[Joseph Salisbury (jsalisbury)]

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.7 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 this bug, please add the tag: 'kernel-bug-exists-upstream'.

Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.7-rc4-yakkety/

[Juan Carlos Amengual (jcamen-lsi)]

I have installed kernel v4.7-rc4-yakkety as requested (packages linux-image-generic, linux-headers-generic, both amd64, and linux-headers, all). I have rebooted with this kernel and I have suspended two times the laptop (one from the KDE menu and the other one just closing the lid). Both times suspend worked OK. Everything was fine. Finally, I have hibernated the laptop and... everything was right again! The laptop halted and resumed OK. I will use this kernel version until the bug has been solved in mainstream kernel. I proceed to mark this bug as requested. Thanks a lot!

[penalvch (penalvch)]

Juan Carlos Amengual, the next step is to fully reverse commit bisect from kernel 4.4 to 4.7-rc4 in order to identify the last bad commit, followed immediately by the first good one. Once this good commit has been identified, it may be reviewed for backporting. Could you please do this following https://wiki.ubuntu.com/Kernel/KernelBisection#How_do_I_reverse_bisect_the_upstream_kernel.3F ?

Please note, finding adjacent kernel versions is not fully commit bisecting.

Also, the kernel release names are irrelevant for the purposes of bisecting.

After the fix commit (not kernel version) has been identified, then please mark this report Status Confirmed.

Thank you for your help.

[Juan Carlos Amengual (jcamen-lsi)]

Dear Christopher, I've been out on holiday since the beginning of the month (without the laptop). I came back yesterday, so now I've been able to test the kernel.

Good news: when I turned on the laptop, a huge update was waiting for me, including a new kernel version, 4.4.0-31. I have booted with this version of the kernel, so as to test both suspend and hibernate and... everything was OK! I have successfully suspended seven times the laptop. Hibernation also works OK (tested two times). Therefore, I think that this bug can be closed because kernel version 4.4.0-31 seems to solve it.

I apologize for the inconveniences. Thanks a lot for your time and efforts. Let me know if I have to do something else.

[penalvch (penalvch)]

Juan Carlos Amengual, this bug report is being closed due to your last comment https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1595969/comments/7 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 yellow line and then choosing a new status in the revealed drop down box. You can learn more about bug statuses at https://wiki.ubuntu.com/Bugs/Status. Thank you again for taking the time to report this bug and helping to make Ubuntu better. Please submit any future bugs you may find.