Thanks. With the new kernel version and modules:
tc@box:/var/log$ uname -a
Linux box 4.14.47-tinycore64 #1 SMP Mon Jun 4 14:04:20 UTC 2018 x86_64 GNU/Linux
tc@box:/var/log$ lsmod
Module Size Used by Not tainted
vmwgfx 184320 1
ttm 57344 1 vmwgfx
drm_kms_helper 90112 1 vmwgfx
drm 225280 4 vmwgfx,ttm,drm_kms_helper
intel_agp 16384 1
intel_gtt 16384 1 intel_agp
agpgart 28672 4 ttm,drm,intel_agp,intel_gtt
i2c_piix4 16384 0
cpufreq_powersave 12288 0
cpufreq_userspace 12288 0
cpufreq_conservative 12288 0
vmw_vsock_vmci_transport 20480 1
squashfs 28672 0
zstd_decompress 77824 1 squashfs
xxhash 12288 1 zstd_decompress
pcspkr 12288 0
xhci_pci 12288 0
vmxnet3 40960 0
xhci_hcd 81920 1 xhci_pci
vmw_vmci 40960 1 vmw_vsock_vmci_transport
loop 20480 0
ac 12288 0
It still segfaults:
tc@box:/var/log$ cat Xorg.0.log
[ 16713.348]
X.Org X Server 1.20.0
X Protocol Version 11, Revision 0
[ 16713.348] Build Operating System: Linux 4.14.10-tinycore64 x86_64
[ 16713.348] Current Operating System: Linux box 4.14.47-tinycore64 #1 SMP Mon Jun 4 14:04:20 UTC 2018 x86_64
[ 16713.348] Kernel command line: BOOT_IMAGE=/boot/vmlinuz64-9asj loglevel=3 vga=791 syslog noswap nozswap text tce=sda1/tce64 lang=en_US.UTF-8 udev.children-max=24 initrd=/boot/rootfs64-9-0.gz,/boot/modules64-9asj.gz
[ 16713.348] Build Date: 29 May 2018 01:41:32PM
...
[ 16713.746] (EE) Backtrace:
[ 16713.746] (EE) 0: /usr/local/lib/xorg/Xorg (xorg_backtrace+0x49) [0x51b05c]
[ 16713.746] (EE) 1: /usr/local/lib/xorg/Xorg (0x400000+0x13bdf2) [0x53bdf2]
[ 16713.746] (EE) 2: /lib/libpthread.so.0 (0x7f2f89b20000+0x10030) [0x7f2f89b30030]
[ 16713.746] (EE) 3: /usr/local/lib/xorg/Xorg (0x400000+0x12d4a2) [0x52d4a2]
[ 16713.746] (EE) 4: /usr/local/lib/xorg/Xorg (RROutputIsLeased+0x14) [0x4c5c4e]
[ 16713.746] (EE) 5: /usr/local/lib/xorg/Xorg (xf86DPMSSet+0x54) [0x4cd2f8]
[ 16713.746] (EE) 6: /usr/local/lib/xorg/modules/drivers/vmware_drv.so (0x7f2f86348000+0x9b98) [0x7f2f86351b98]
[ 16713.746] (EE) 7: /usr/local/lib/xorg/modules/drivers/vmware_drv.so (0x7f2f86348000+0x1189c) [0x7f2f8635989c]
[ 16713.746] (EE) 8: /usr/local/lib/xorg/modules/drivers/vmware_drv.so (0x7f2f86348000+0x9c2e) [0x7f2f86351c2e]
[ 16713.746] (EE) 9: /usr/local/lib/xorg/Xorg (0x400000+0xcdce1) [0x4cdce1]
[ 16713.746] (EE) 10: /usr/local/lib/xorg/Xorg (0x400000+0x108bfc) [0x508bfc]
[ 16713.746] (EE) 11: /usr/local/lib/xorg/Xorg (0x400000+0x85631) [0x485631]
[ 16713.746] (EE) 12: /usr/local/lib/xorg/Xorg (0x400000+0x2de01) [0x42de01]
[ 16713.746] (EE) 13: /lib/libc.so.6 (__libc_start_main+0x15a) [0x7f2f88c6109d]
[ 16713.746] (EE) 14: /usr/local/lib/xorg/Xorg (_start+0x2a) [0x42defa]
[ 16713.746] (EE)
[ 16713.746] (EE) Segmentation fault at address 0x1000000b1
[ 16713.746] (EE)
Fatal server error:
[ 16713.746] (EE) Caught signal 11 (Segmentation fault). Server aborting
So the kernel module is (probably?) not it.