[15.10 Regression] Sony Vaio has problems resuming from suspend

[Sb]

I had Ubuntu 15.04 with Unity on a Sony Vaio laptop. Resuming from suspend worked just fine. But after a fresh install of the 15.10 beta, it has trouble resuming. Instead of showing the screen locker, it shows the previous screen with a mouse pointer over the "suspend" item in the user cog icon menu. (I suspend it from that menu, not the key combination.) After a few seconds it shows the lock screen, but the password field doesn't accept input for several seconds more. Finally the screen blinks and it starts accepting password input. This process used to be smooth and instantaneous with 15.04, now it's extremely slow and buggy.
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ApportVersion: 2.17.2-0ubuntu1.4
Architecture: i386
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: kellie 1483 F.... pulseaudio
CurrentDesktop: Unity
DistroRelease: Ubuntu 15.04
HibernationDevice: RESUME=UUID=521e9b50-bb7c-4eb9-9c2f-fd7ff5b9119d
InstallationDate: Installed on 2015-09-21 (0 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release i386 (20150422)
MachineType: Sony Corporation SVE14115FLP
Package: linux (not installed)
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-28-generic root=UUID=a444860f-9245-48bf-bda8-2aedc17828f5 ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 3.19.0-28.30-generic 3.19.8-ckt5
RelatedPackageVersions:
 linux-restricted-modules-3.19.0-28-generic N/A
 linux-backports-modules-3.19.0-28-generic N/A
 linux-firmware 1.143.3
Tags: vivid
UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
Uname: Linux 3.19.0-28-generic i686
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 04/24/2012
dmi.bios.vendor: Insyde Corp.
dmi.bios.version: R0180E5
dmi.board.asset.tag: N/A
dmi.board.name: VAIO
dmi.board.vendor: Sony Corporation
dmi.board.version: N/A
dmi.chassis.asset.tag: N/A
dmi.chassis.type: 10
dmi.chassis.vendor: Sony Corporation
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnInsydeCorp.:bvrR0180E5:bd04/24/2012:svnSonyCorporation:pnSVE14115FLP:pvrC10FB1CU:rvnSonyCorporation:rnVAIO:rvrN/A:cvnSonyCorporation:ct10:cvrN/A:
dmi.product.name: SVE14115FLP
dmi.product.version: C10FB1CU
dmi.sys.vendor: Sony Corporation

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1498034/+editstatus and add the package name in the text box next to the word Package.

[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]

[Brad Figg (brad-figg)]

This bug is missing log files that will aid in diagnosing the problem. From a terminal window please run:

apport-collect 1498034

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

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The apport logs are after I already downgraded to 15.04. But if necessary I can run this again from the live USB with 15.10.

[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 v4.3 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/v4.3-rc2-unstable/

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]