As described in bug 154075 - doing an operation in the terminal that uses the bell (ie, backspacing beyond prompt) crashes x11 dead. This was a problem in 1.14, requiring a patch 1.1.4-r1.
Emerging xf86-input-evdev-1.15 shows the following:
evdev_key.c: In function 'EvdevKbdBell':
evdev_key.c:245: warning: implicit declaration of function 'xf86OSRingBell'
Apparently the upstream patch described in bug 154075 didn't make it to 1.l.5.
Diffing the tarball contents indicates the only changes were to the build system. Applying the patch from bug 154075 should still work (patch should still apply and should still fix this) but I haven't tried it yet :)
I've applied the patch with the 1.1.5 ebuild. So far, so good. =)
I have the same problem on x86 - evdev-1.1.5 crashes the x server with the system bell. Interestingly, I didn't have the same problem with 1.1.4...
On a side note, how can I tweak the ebuild to apply the given patch? there isnt an src_unpack()...
Sorry about that guys. Somehow I thought the problem had been fixed in 1.1.5.
Patch re-added in 1.1.5-r1.