Eu tenho alguns problemas com unidades flash USB3 no Ubuntu 16.04. Eles continuam entrando no modo U1 / U2 ( veja aqui para saber mais informações ), resultando ocasionalmente em erros de E / S. Eu já desativei o gerenciamento de energia USB tradicional (controlado por software) colocando isso em /etc/rc.local (sim, é redundante):
for i in /sys/bus/usb/devices/*/power/autosuspend_delay_ms;
do echo -1 > $i;
done
for foo in /sys/bus/usb/devices/*/power/control;
do echo on > $foo;
done
Também tentei a opção de inicialização do kernel usbcore.autosuspend=-1 .
Mas de acordo com dmesg , as unidades flash ainda continuam entrando no modo U1 / U2. A documentação diz que o USB3 LPM pode ser desativado usando /sys/bus/usb/devices/.../(hub interface)/portX/usb3_lpm_permit , mas este arquivo não existe para qualquer dispositivo USB no meu computador, pelo menos find /sys -iname "*usb3*" não mostra. O que mostra é esses arquivos somente leitura:
/sys/devices/pci0000:00/0000:00:14.0/usb2/2-1/power/usb3_hardware_lpm_u1
/sys/devices/pci0000:00/0000:00:14.0/usb2/2-1/power/usb3_hardware_lpm_u2
/sys/devices/pci0000:00/0000:00:14.0/usb2/2-2/power/usb3_hardware_lpm_u1
/sys/devices/pci0000:00/0000:00:14.0/usb2/2-2/power/usb3_hardware_lpm_u2
/sys/devices/pci0000:00/0000:00:14.0/usb2/2-3/power/usb3_hardware_lpm_u1
/sys/devices/pci0000:00/0000:00:14.0/usb2/2-3/power/usb3_hardware_lpm_u2
/sys/devices/pci0000:00/0000:00:14.0/usb2/2-4/power/usb3_hardware_lpm_u1
/sys/devices/pci0000:00/0000:00:14.0/usb2/2-4/power/usb3_hardware_lpm_u2
/sys/devices/pci0000:00/0000:00:14.0/usb2/power/usb3_hardware_lpm_u1
/sys/devices/pci0000:00/0000:00:14.0/usb2/power/usb3_hardware_lpm_u2
os oito primeiros contêm a string "enabled", somente os dois últimos (o hub, eu acho) dizem "disabled".
Como posso substituir isso e desabilitar o USB3 LPM para todos os quatro dispositivos? Escrever para esses arquivos não funciona, eu tentei.
Aqui estão as informações do meu sistema: HP Chromebox
# lsusb
Bus 002 Device 009: ID 05dc:a838 Lexar Media, Inc.
Bus 002 Device 006: ID 05dc:a838 Lexar Media, Inc.
Bus 002 Device 010: ID 05dc:a838 Lexar Media, Inc.
Bus 002 Device 008: ID 05dc:a838 Lexar Media, Inc.
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 0cf3:311e Atheros Communications, Inc.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Kernel:
# uname -a
Linux FileserverA112 4.4.0-31-generic #50-Ubuntu SMP Wed Jul 13 00:07:12 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
# lspci -knn
00:00.0 Host bridge [0600]: Intel Corporation Haswell-ULT DRAM Controller [8086:0a04] (rev 0b)
Subsystem: Google, Inc. Haswell-ULT DRAM Controller [1ae0:c000]
Kernel driver in use: hsw_uncore
00:02.0 VGA compatible controller [0300]: Intel Corporation Haswell-ULT Integrated Graphics Controller [8086:0a06] (rev 0b)
Subsystem: Google, Inc. Haswell-ULT Integrated Graphics Controller [1ae0:c000]
Kernel driver in use: i915
Kernel modules: i915
00:03.0 Audio device [0403]: Intel Corporation Haswell-ULT HD Audio Controller [8086:0a0c] (rev 0b)
Subsystem: Google, Inc. Haswell-ULT HD Audio Controller [1ae0:c000]
Kernel driver in use: snd_hda_intel
Kernel modules: snd_hda_intel
00:14.0 USB controller [0c03]: Intel Corporation 8 Series USB xHCI HC [8086:9c31] (rev 04)
Subsystem: Google, Inc. 8 Series USB xHCI HC [1ae0:c000]
Kernel driver in use: xhci_hcd
00:16.0 Communication controller [0780]: Intel Corporation 8 Series HECI #0 [8086:9c3a] (rev 04)
Subsystem: Google, Inc. 8 Series HECI [1ae0:c000]
Kernel driver in use: mei_me
Kernel modules: mei_me
00:1b.0 Audio device [0403]: Intel Corporation 8 Series HD Audio Controller [8086:9c20] (rev 04)
Subsystem: Google, Inc. 8 Series HD Audio Controller [1ae0:c000]
Kernel driver in use: snd_hda_intel
Kernel modules: snd_hda_intel
00:1c.0 PCI bridge [0604]: Intel Corporation 8 Series PCI Express Root Port 3 [8086:9c14] (rev e4)
Kernel driver in use: pcieport
Kernel modules: shpchp
00:1c.1 PCI bridge [0604]: Intel Corporation 8 Series PCI Express Root Port 4 [8086:9c16] (rev e4)
Kernel driver in use: pcieport
Kernel modules: shpchp
00:1c.2 PCI bridge [0604]: Intel Corporation 8 Series PCI Express Root Port 5 [8086:9c18] (rev e4)
Kernel driver in use: pcieport
Kernel modules: shpchp
00:1f.0 ISA bridge [0601]: Intel Corporation 8 Series LPC Controller [8086:9c45] (rev 04)
Subsystem: Google, Inc. 8 Series LPC Controller [1ae0:c000]
Kernel driver in use: lpc_ich
Kernel modules: lpc_ich
00:1f.2 SATA controller [0106]: Intel Corporation 8 Series SATA Controller 1 [AHCI mode] [8086:9c03] (rev 04)
Subsystem: Google, Inc. 8 Series SATA Controller 1 [AHCI mode] [1ae0:c000]
Kernel driver in use: ahci
Kernel modules: ahci
00:1f.3 SMBus [0c05]: Intel Corporation 8 Series SMBus Controller [8086:9c22] (rev 04)
Subsystem: Google, Inc. 8 Series SMBus Controller [1ae0:c000]
Kernel modules: i2c_i801
00:1f.6 Signal processing controller [1180]: Intel Corporation 8 Series Thermal [8086:9c24] (rev 04)
Subsystem: Google, Inc. 8 Series Thermal [1ae0:c000]
01:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 0c)
Subsystem: Realtek Semiconductor Co., Ltd. RTL8111/8168 PCI Express Gigabit Ethernet controller [10ec:8168]
Kernel driver in use: r8169
Kernel modules: r8169
02:00.0 Network controller [0280]: Qualcomm Atheros AR9462 Wireless Network Adapter [168c:0034] (rev 01)
Subsystem: Hewlett-Packard Company AR9462 Wireless Network Adapter [103c:1864]
Kernel driver in use: ath9k
Kernel modules: ath9k