Suspend to RAM/HDD causes strange mouse issues in KDE

Question

I suspect that this problem is related to something taking focus and not releasing it, but I'm having a very hard time identifying what, and I'm not sure on my next steps of investigation.
I have a newly installed Fujitsu Lifebook P701 laptop, set up with KDE (installed with KDE-Base). The system will Hibernate perfectly, either to HDD or RAM. It will come up correctly and get back to the login screen. I am able to log in fine and the mouse always responds correctly here. Once I have logged back in, the mouse responds correctly for a few seconds (this amount of time is variable). After these few seconds the mouse will move on screen, but when clicking it either doesn't respond at all, or responds in an unexpected way (depending on where on screen is clicked). Some examples of this behaviour:
1. Click on the K button in the task bar - Either the K menu opens, but nothing in the menu can be clicked; or the menu doesn't open at all.
2. Click on programs in the task bar - Either the program will maximise/minimise, but doesn't respond to right click; or the program doesn't respond at all (the response can be both for different programs).
3. Click on a link in web page - no response
4. Click anywhere else on a web page - either no response, or text is selected (from a single click).
5. Click on the top of a window - the four arrow cursor immediately comes up and the window starts to move, clicking again doesn't release the window.
Investigation done so far:
1. Removed every activity that is running (task manger, notification etc), the only one not removed so far is the task bar itself.
2. checked .xsession-errors for obvious errors (none found).
3. Used kwin --replace, the issue still occurs after this is run.
4. Closed every program that was running and tested.
5. Read around on the KDE and Arch forums to find anything similar, I can find a couple of posts that are similar, but no solutions as yet.
6. Done a full upgrade to the system (this was a couple of days ago now).
Investigation I've not done so far but am planning on doing:
1. Creating a new user - As the issue started on the first hibernation of the laptop I don't think this will fix it, but it's worth a go.
2. Installing another WM to prove this is a KDE issue (I'm pretty sure it is and I don't have a huge amount of space as I installed an SSD).
I can get the laptop to work again by restarting KDM (systemctl restart kdm) so it's fixable, but I'd really like to get to the bottom of it.
I've posted to Laptop fault as I'm not 100% sure this is a KDE issue, but I suspect it will be (it certainly seems to be similar to other issues that have been identified as KDE specific).
What are your next recommended steps of investigation? I'm really stumped on what could be causing this. As I say at the top I suspect it's a focus issue but I have no idea what is stealing focus and how to find the culprit.

Answer 1

I have similar problems since the last kernel upgrade: Prior to that everything on my laptop worked fine. After, when I close the lid (set to "sleep") the screen returns, the mouse appears to work, clicking on the panel often does not work, the menu may or may not pop up......
H/W path Device Class Description
===================================================
system HP Pavilion dm1 Notebook PC (VY474EA#ABU)
/0 bus 3663
/0/0 memory 1MiB BIOS
/0/4 memory 5GiB System Memory
/0/4/0 memory 1GiB SODIMM DDR3 Synchronous 800 MHz (1.2 ns)
/0/4/1 memory 4GiB SODIMM DDR3 Synchronous 800 MHz (1.2 ns)
/0/a processor Core 2 Duo
/0/a/b memory 1MiB L2 cache
/0/a/d memory 32KiB L1 cache
/0/c memory 32KiB L1 cache
/0/100 bridge Mobile 4 Series Chipset Memory Controller Hub
/0/100/2 display Mobile 4 Series Chipset Integrated Graphics Controller
/0/100/2.1 display Mobile 4 Series Chipset Integrated Graphics Controller
/0/100/1a bus 82801I (ICH9 Family) USB UHCI Controller #4
/0/100/1a/1 usb3 bus UHCI Host Controller
/0/100/1a/1/1 input USB Receiver
/0/100/1a.7 bus 82801I (ICH9 Family) USB2 EHCI Controller #2
/0/100/1a.7/1 usb1 bus EHCI Host Controller
/0/100/1b multimedia 82801I (ICH9 Family) HD Audio Controller
/0/100/1c bridge 82801I (ICH9 Family) PCI Express Port 1
/0/100/1c/0 wlo1 network BCM4312 802.11b/g LP-PHY
/0/100/1c.1 bridge 82801I (ICH9 Family) PCI Express Port 2
/0/100/1c.1/0 enp3s0 network RTL8101E/RTL8102E PCI Express Fast Ethernet controller
/0/100/1d bus 82801I (ICH9 Family) USB UHCI Controller #1
/0/100/1d/1 usb4 bus UHCI Host Controller
/0/100/1d.1 bus 82801I (ICH9 Family) USB UHCI Controller #2
/0/100/1d.1/1 usb5 bus UHCI Host Controller
/0/100/1d.2 bus 82801I (ICH9 Family) USB UHCI Controller #3
/0/100/1d.2/1 usb6 bus UHCI Host Controller
/0/100/1d.2/1/2 communication HP Bluetooth Module
/0/100/1d.3 bus 82801I (ICH9 Family) USB UHCI Controller #6
/0/100/1d.3/1 usb7 bus UHCI Host Controller
/0/100/1d.7 bus 82801I (ICH9 Family) USB2 EHCI Controller #1
/0/100/1d.7/1 usb2 bus EHCI Host Controller
/0/100/1d.7/1/4 multimedia HP Webcam-50
/0/100/1e bridge 82801 Mobile PCI Bridge
/0/100/1f bridge ICH9M-E LPC Interface Controller
/0/100/1f.2 storage 82801IBM/IEM (ICH9M/ICH9M-E) 4 port SATA Controller [AHCI mode]
/0/100/1f.3 bus 82801I (ICH9 Family) SMBus Controller
/0/100/1f.6 generic 82801I (ICH9 Family) Thermal Subsystem
/1 power PT06055
$ uname -a
Linux hp-dm1 3.15.1-1-ARCH #1 SMP PREEMPT Tue Jun 17 09:32:20 CEST 2014 x86_64 GNU/Linux
Andrew