I recently did a

sudo apt-get dist-upgrade

and now beyond grub, neither the mouse nor the keyboard (both usb connections) works. I can fortunately still ssh into the machine, and use it that way, but I would like to be able to work on it directly :-)

To be specific, running setxkbmap -query returns

Cannot open display "default display"

For more info:

Linux erdos 3.13.0-54-generic #91-Ubuntu SMP Tue May 26 19:15:08 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux 



00:00.0 Host bridge: Intel Corporation 4th Gen Core Processor DRAM Controller (rev 06)

00:02.0 VGA compatible controller: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller (rev 06)

00:03.0 Audio device: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor HD Audio Controller (rev 06)

00:14.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset Family USB xHCI (rev 05)

00:16.0 Communication controller: Intel Corporation 8 Series/C220 Series Chipset Family MEI Controller #1 (rev 04)

00:1a.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset Family USB EHCI #2 (rev 05)

00:1b.0 Audio device: Intel Corporation 8 Series/C220 Series Chipset High Definition Audio Controller (rev 05)

00:1c.0 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #1 (rev d5)

00:1c.3 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #4 (rev d5)

00:1c.4 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #5 (rev d5)

00:1d.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset Family USB EHCI #1 (rev 05)

00:1f.0 ISA bridge: Intel Corporation C220 Series Chipset Family H81 Express LPC Controller (rev 05)

00:1f.2 SATA controller: Intel Corporation 8 Series/C220 Series Chipset Family 6-port SATA Controller 1 [AHCI mode] (rev 05)

00:1f.3 SMBus: Intel Corporation 8 Series/C220 Series Chipset Family SMBus Controller (rev 05)

02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 0c)

03:00.0 Network controller: Qualcomm Atheros QCA9565 / AR9565 Wireless Network Adapter (rev 01)

Also, I did some digging using dmesg

[    1.604462] usb 3-2: Product: USB Optical Mouse

[    1.606457] input: PixArt USB Optical Mouse as /devices/pci0000:00/0000:00:14.0/usb3/3-2/3-2:1.0/input/input8

[    1.606675] hid-generic 0003:0461:4E22.0003: input,hidraw2: USB HID v1.11 Mouse [PixArt USB Optical Mouse] on usb-0000:00:14.0-2/input0



[    1.417582] usb 3-1: Product: Dell USB Wired Entry Keyboard

[    1.428679] input: Dell Dell USB Wired Entry Keyboard as /devices/pci0000:00/0000:00:14.0/usb3/3-1/3-1:1.0/input/input6

[    1.428735] hid-generic 0003:413C:2111.0001: input,hidraw0: USB HID v1.10 Keyboard [Dell Dell USB Wired Entry Keyboard] on usb-0000:00:14.0-1/input0

[    1.429961] input: Dell Dell USB Wired Entry Keyboard as /devices/pci0000:00/0000:00:14.0/usb3/3-1/3-1:1.1/input/input7

[    1.430024] hid-generic 0003:413C:2111.0002: input,hidraw1: USB HID v1.10 Device [Dell Dell USB Wired Entry Keyboard] on usb-0000:00:14.0-1/input1



[   19.156553] usb 3-10: USB disconnect, device number 4

[   26.683353] usb 3-1: USB disconnect, device number 2

[   26.783328] usb 3-2: USB disconnect, device number 3

[   26.811550] usb 3-10: USB disconnect, device number 6

So it seems that something funky is going on with the USB ports, i.e. something is disconnecting them after succesfully recognizing them.

Any help would be GREATLY appreciated.