[mi] EQ overflowing.  Additional events will be discarded until existing events are processed.

Backtrace:
0: /usr/bin/X (xorg_backtrace+0x56) [0x5600378c05a6]
1: /usr/bin/X (mieqEnqueue+0x24b) [0x5600378a26eb]
2: /usr/bin/X (QueuePointerEvents+0x52) [0x56003777caf2]
3: /usr/lib/xorg/modules/input/evdev_drv.so (0x7f94b38d8000+0x60ca) [0x7f94b38de0ca]
4: /usr/lib/xorg/modules/input/evdev_drv.so (0x7f94b38d8000+0x658d) [0x7f94b38de58d]
5: /usr/bin/X (0x56003770d000+0x96718) [0x5600377a3718]
6: /usr/bin/X (0x56003770d000+0xbfaa7) [0x5600377ccaa7]
7: /lib/x86_64-linux-gnu/libc.so.6 (0x7f94b97db000+0x352f0) [0x7f94b98102f0]
8: /lib/x86_64-linux-gnu/libc.so.6 (ioctl+0x7) [0x7f94b98d80b7]
9: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f94b5dba000+0x2179d) [0x7f94b5ddb79d]
10: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f94b5dba000+0x24aba) [0x7f94b5ddeaba]
11: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f94b5dba000+0x55dce) [0x7f94b5e0fdce]
12: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f94b5dba000+0x7207b) [0x7f94b5e2c07b]
13: /usr/bin/X (BlockHandler+0x4a) [0x560037769c3a]
14: /usr/bin/X (WaitForSomething+0x132) [0x5600378bd802]
15: /usr/bin/X (0x56003770d000+0x57ed1) [0x560037764ed1]
16: /usr/bin/X (0x56003770d000+0x5c2ab) [0x5600377692ab]
17: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf0) [0x7f94b97fba40]
18: /usr/bin/X (_start+0x29) [0x560037753639]

[mi] These backtraces from mieqEnqueue may point to a culprit higher up the stack.
[mi] mieq is *NOT* the cause.  It is a victim.