lumina: Windows are no longer movable by dragging the title bar, and Alt-Tab does not switch

… and it’s generally difficult to bring some types of window to the front. For example, whilst typing this in Firefox there’s a window of Konsole to one side. Clicking in the content area is recognised (I can, for example select text) but the window does not come to the front. A click on the title bar has the required effect. Lumina Desktop Information may be less bugged. When that’s in front, clicks in content areas of Firefox and Konsole windows fail to bring those applications to front. If I click the title bar of Firefox to bring it to the front, then clicks in various parts of Lumina Desktop Information do have the required effect; sensitivity is not limited to its title bar.

I have encountered the immovable symptom on a few occasions, we should probably have an issue for tracking.

Environment

Lumina 1.2.1 on an HP EliteBook 850 G2.

$ about
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General info:
       Host:...............momh167-gjp4-hpelitebook850g2-trueos.university.brighton.ac.uk
       User:...............grahamperrin
       Uptime:.............8 mins
       FreeBSD kernel ver:.12.0-CURRENT
       FreeBSD world ver:..12.0-CURRENT
       FreeBSD git branch:.drm-next
       FreeBSD git rev:....3dbce2a
       TrueOS ver:.........TrueOS-Desktop-201701261715
       Arch:...............amd64
       Kernel ident:.......GENERIC
       Bootloader:.........BSD
       Bootloader type:....EFI
       CPU:................Intel(R) Core(TM) i7-5600U CPU @ 2.60GHz
       CPU cores:..........4
       Memory (free/avail):13529 / 16384 Mb
       Package set:........CUSTOM
       Desktop environment:Lumina
       X11 Driver:.........modesetting_drv.so 
       OSS Driver:.........pcm1: <Realtek (0x0280) (Analog 2.0+HP/2.0)> (play/rec) default
       WIFI Driver:........iwm0
$ 

$ pciconf -lv
hostb0@pci0:0:0:0:      class=0x060000 card=0x2216103c chip=0x16048086 rev=0x09 hdr=0x00
    vendor     = 'Intel Corporation'
    device     = 'Broadwell-U Host Bridge -OPI'
    class      = bridge
    subclass   = HOST-PCI
vgapci0@pci0:0:2:0:     class=0x030000 card=0x2216103c chip=0x16168086 rev=0x09 hdr=0x00
    vendor     = 'Intel Corporation'
    device     = 'HD Graphics 5500'
    class      = display                                                                                                               
    subclass   = VGA                                                                                                                   
hdac0@pci0:0:3:0:       class=0x040300 card=0x2216103c chip=0x160c8086 rev=0x09 hdr=0x00                                               
    vendor     = 'Intel Corporation'                                                                                                   
    device     = 'Broadwell-U Audio Controller'                                                                                        
    class      = multimedia                                                                                                            
    subclass   = HDA                                                                                                                   
xhci0@pci0:0:20:0:      class=0x0c0330 card=0x2216103c chip=0x9cb18086 rev=0x03 hdr=0x00
    vendor     = 'Intel Corporation'
    device     = 'Wildcat Point-LP USB xHCI Controller'
    class      = serial bus
    subclass   = USB
none0@pci0:0:22:0:      class=0x078000 card=0x2216103c chip=0x9cba8086 rev=0x03 hdr=0x00
    vendor     = 'Intel Corporation'
    device     = 'Wildcat Point-LP MEI Controller'
    class      = simple comms
em0@pci0:0:25:0:        class=0x020000 card=0x2216103c chip=0x15a28086 rev=0x03 hdr=0x00
    vendor     = 'Intel Corporation'
    device     = 'Ethernet Connection (3) I218-LM'
    class      = network
    subclass   = ethernet
hdac1@pci0:0:27:0:      class=0x040300 card=0x2216103c chip=0x9ca08086 rev=0x03 hdr=0x00
    vendor     = 'Intel Corporation'
    device     = 'Wildcat Point-LP High Definition Audio Controller'
    class      = multimedia
    subclass   = HDA
pcib1@pci0:0:28:0:      class=0x060400 card=0x2216103c chip=0x9c908086 rev=0xe3 hdr=0x01
    vendor     = 'Intel Corporation'
    device     = 'Wildcat Point-LP PCI Express Root Port'
    class      = bridge
    subclass   = PCI-PCI
pcib2@pci0:0:28:3:      class=0x060400 card=0x2216103c chip=0x9c968086 rev=0xe3 hdr=0x01
    vendor     = 'Intel Corporation'
    device     = 'Wildcat Point-LP PCI Express Root Port'
    class      = bridge
    subclass   = PCI-PCI
ehci0@pci0:0:29:0:      class=0x0c0320 card=0x2216103c chip=0x9ca68086 rev=0x03 hdr=0x00
    vendor     = 'Intel Corporation'
    device     = 'Wildcat Point-LP USB EHCI Controller'
    class      = serial bus
    subclass   = USB
isab0@pci0:0:31:0:      class=0x060100 card=0x2216103c chip=0x9cc38086 rev=0x03 hdr=0x00
    vendor     = 'Intel Corporation'
    device     = 'Wildcat Point-LP LPC Controller'
    class      = bridge
    subclass   = PCI-ISA
ahci0@pci0:0:31:2:      class=0x010601 card=0x2216103c chip=0x9c838086 rev=0x03 hdr=0x00
    vendor     = 'Intel Corporation'
    device     = 'Wildcat Point-LP SATA Controller [AHCI Mode]'
    class      = mass storage
    subclass   = SATA
none1@pci0:0:31:3:      class=0x0c0500 card=0x2216103c chip=0x9ca28086 rev=0x03 hdr=0x00
    vendor     = 'Intel Corporation'
    device     = 'Wildcat Point-LP SMBus Controller'
    class      = serial bus
    subclass   = SMBus
iwm0@pci0:2:0:0:        class=0x028000 card=0x50008086 chip=0x095a8086 rev=0x48 hdr=0x00
    vendor     = 'Intel Corporation'
    device     = 'Wireless 7265'
    class      = network
$