Date: Sun, 21 Jan 2018 15:41:40 +0000 From: Johannes Lundberg <johalun0@gmail.com> To: freebsd-current <freebsd-current@freebsd.org> Subject: Periodical interrupt storm when playing game with USB keyboard Message-ID: <CAECmPwvDQBYw=mKJpZfUdKpXSC8GysZKSk0f9qaZEXCvy_QeMA@mail.gmail.com>
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Hi Finally I found the root to the problem that's been having me puzzled for the last week. I started playing UT2004 on my laptop while away from home. Worked perfectly. When I'm home and connect external display+mouse/keyboard, I get weird random lag. It is intr process that goes up to 100% CPU usage (swi4: clock) for a couple of seconds every 30 seconds or so, but only when I'm moving around in the game. To move around you need to hold down any of the wasd-keys. Turns out, the interrupt storms only happen when I use my external keyboard, not with the laptop keyboard. The internal keyboard is: atkbdc0: <Keyboard controller (i8042)> port 0x60,0x64 irq 1 on acpi0 atkbd0: <AT Keyboard> irq 1 on atkbdc0 and external (Microsoft sculpt ergonomic desktop): ugen0.2: <Microsoft Microsoft 2.4GHz Transceiver v9.0> at usbus0 ukbd0: <Microsoft Microsoft 2.4GHz Transceiver v9.0, class 0/0, rev 2.00/7.97, addr 1> on usbus0 The game runs with a linux binary. 32/64bit both act the same. It uses libSDL-1.2 from /compat/linux/lib for rendering but not sure about input events. I tried lowering the key repeat rate both with xset and kbdcontrol but it has no effect. I don't have any wired USB keyboard to try with. Anyone have a clue to what's going on? Hardware is Dell Latitude E7270 with FreeBSD 12-CURRENT drm-next-kmod linux-c6
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