Recentemente fiz um
sudo apt-get dist-upgrade
e agora além do grub, nem o mouse nem o teclado (ambas as conexões usb) funcionam. Eu posso felizmente ainda ssh na máquina, e usá-lo dessa maneira, mas eu gostaria de poder trabalhar nele diretamente: -)
Para ser específico, executar setxkbmap -query retorna
Cannot open display "default display"
Para mais informações:
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)
Além disso, fiz algumas pesquisas usando 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
Parece que algo está acontecendo com as portas USB, ou seja, algo está desconectando-as depois de reconhecê-las com sucesso.
Qualquer ajuda seria muito apreciada.
Reinicie o seu PC, entre na configuração do BIOS, procure por "suporte legado USB" (ASUS Motherboards você pode encontrar em "configurações avançadas") e defina como "ativado". Verifique o manual da sua placa-mãe ou o site do fornecedor.
Espero que possa ajudar você.
Similarmente à discussão sobre os comentários na outra resposta, a resposta para mim foi na BIOS. Embora o suporte USB legado não tenha impacto, no entanto, a seguinte configuração funcionou para mim:
Boot Maintenance Manager
Advanced Boot Options
USB Boot Priority: <DISABLED>
(Note que não havia dispositivo USB inicializável conectado.)