** Summary changed: - USB keyboard and mouse lag while laptop keyboard & mouse act normally after update. + External USB keyboard and mouse lag (laptop keyboard & touchpad normal) when booting with HDMI cable.
** Description changed: - I just ran an Ubuntu update and now I have trouble with my external USB keyboard & mouse lagging. - My kernel just updated to 3.2.0-30. However, I rebooted with 3.2.0-29 and 3.2.0-27 and still see the problem, so I'm not sure it's the kernel itself, maybe a configuration change that came with the update? + I switched from a VGA cable to an HDMI cable for my external monitor. If + I boot with the cable pluged in, I get the USB issue below. However, if + I plug-in the HDMI cable after bootup, I don't see this problem. Booting + with VGA plugged in is fine as well. The USB mouse stutters/lags as I move it and the USB keyboard misses characters as a type and registers keys slowly. Both seem to have the same latency, I would estimate it around 250ms. So, moving the mouse steadily, I only see it's position update every 250ms or so. Typing quickly on the keyboard results in lost characters. If I rapidly press a key on the USB keyboard, the keys register slower than on the laptop keyboard. For example, rapidly repeating a key on the USB keyboard for 10 seconds, I get about 40 characters on the USB keyboard, but the same test with the laptop keyboard results in around 70. There are some similar bugs regarding the lightdm themes, but my issue seems different. See 945749 and its duplicates: https://bugs.launchpad.net/ubuntu/+source/unity-greeter/+bug/945749 My problem occurs in the greeter and the normal gnome desktop. I've tried Gnome Shell, Unity, Enlightenment 17; all have the issue. I tried changing themes, no effect. I also tried disabling polling: echo N > /sys//module/drm_kms_helper/parameters/poll Unplugging 2nd monitor. Replugging both USB devices. When I plug in the USB keyboard, dmesg reports: [ 1667.803020] usb 1-1.1: new low-speed USB device number 10 using ehci_hcd [ 1668.166316] input: Microsoft Natural\xffffffc2\xffffffae\xffffffae Ergonomic Keyboard 4000 as /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.1/1-1.1:1.0/input/input20 [ 1668.166669] microsoft 0003:045E:00DB.0009: input,hidraw0: USB HID v1.11 Keyboard [Microsoft Natural\xffffffc2\xffffffae\xffffffae Ergonomic Keyboard 4000] on usb-0000:00:1a.0-1.1/input0 [ 1668.242069] input: Microsoft Natural\xffffffc2\xffffffae\xffffffae Ergonomic Keyboard 4000 as /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.1/1-1.1:1.1/input/input21 [ 1668.242337] microsoft 0003:045E:00DB.000A: input,hidraw1: USB HID v1.11 Device [Microsoft Natural\xffffffc2\xffffffae\xffffffae Ergonomic Keyboard 4000] on usb-0000:00:1a.0-1.1/input1 This is on a Lenovo ThinkPad Edge. Let me know what logs/tests you want. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1048006 Title: External USB keyboard and mouse lag (laptop keyboard & touchpad normal) when booting with HDMI cable. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1048006/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
