The integrated ethernet interface (gem0) on a Powermac G5 becomes unstable under heavy load. Syslog: Oct 1 11:18:24 G5 kernel: gem0: device timeout Oct 1 11:18:24 G5 kernel: gem0: link state changed to DOWN Oct 1 11:18:26 G5 kernel: gem0: link state changed to UP The problem has also been reported by other people on the mailing list: https://lists.freebsd.org/pipermail/freebsd-ppc/2019-May/010585.html
A commit references this bug: Author: adridg Date: Thu Oct 10 19:02:29 UTC 2019 New revision: 514242 URL: https://svnweb.freebsd.org/changeset/ports/514242 Log: Try to fix build of qt5-gui in the presence of evdev-proto In Qt 5.13, a "helpful" upstream added #includes of the interal FreeBSD event headers; these conflict with evdev-proto headers. Back out that helpful fix, and rely on evdev-proto everywhere (in particular, for dependent ports that use evdev-proto themselves). PR: 240965 Reported by: Walter Schwarzenfeld Changes: head/x11-toolkits/qt5-gui/Makefile head/x11-toolkits/qt5-gui/files/ head/x11-toolkits/qt5-gui/files/patch-src_platformsupport_devicediscovery_qdevicediscovery__static.cpp head/x11-toolkits/qt5-gui/files/patch-src_platformsupport_input_evdevkeyboard_qevdevkeyboard__defaultmap__p.h head/x11-toolkits/qt5-gui/files/patch-src_platformsupport_input_evdevkeyboard_qevdevkeyboardhandler.cpp head/x11-toolkits/qt5-gui/files/patch-src_platformsupport_input_evdevmouse_qevdevmousehandler.cpp head/x11-toolkits/qt5-gui/files/patch-src_platformsupport_input_evdevtablet_qevdevtablethandler.cpp head/x11-toolkits/qt5-gui/files/patch-src_platformsupport_input_evdevtouch_qevdevtouchhandler.cpp