Eu uso o GNU / Linux Mint 18.1 de 64 bits em uma máquina Intel i5 3570K com uma placa gráfica nVIDIA discreta.
Recentemente houve uma queda de energia no meu bairro. Depois disso, não consegui inicializar minha máquina e tive que substituir minha PSU. Agora minha máquina inicializa e funciona. H-o-w-e-v-e-r, tenho recebido estranhas mensagens de erro no meu log, referentes à minha GPU e a suposta desconexão e reconexão de alguns dispositivos USB (que não foram desconectados):
[ 167.367247] NVRM: Xid (PCI:0000:02:00): 13, Graphics SM Warp Exception on (GPC 0, TPC 0): Out Of Range Address
[ 167.367254] NVRM: Xid (PCI:0000:02:00): 13, Graphics SM Global Exception on (GPC 0, TPC 0): Physical Multiple Warp Errors
[ 167.367260] NVRM: Xid (PCI:0000:02:00): 13, Graphics Exception: ESR 0x504648=0x15000e 0x504650=0x24 0x504644=0x13eff2 0x50464c=0x7f
[ 167.367293] NVRM: Xid (PCI:0000:02:00): 13, Graphics SM Warp Exception on (GPC 1, TPC 0): Out Of Range Address
[ 167.367296] NVRM: Xid (PCI:0000:02:00): 13, Graphics SM Global Exception on (GPC 1, TPC 0): Physical Multiple Warp Errors
[ 167.367298] NVRM: Xid (PCI:0000:02:00): 13, Graphics Exception: ESR 0x50c648=0x3a000e 0x50c650=0x24 0x50c644=0x13eff2 0x50c64c=0x7f
[ 167.367329] NVRM: Xid (PCI:0000:02:00): 13, Graphics SM Warp Exception on (GPC 2, TPC 0): Out Of Range Address
[ 167.367332] NVRM: Xid (PCI:0000:02:00): 13, Graphics SM Global Exception on (GPC 2, TPC 0): Physical Multiple Warp Errors
[ 167.367335] NVRM: Xid (PCI:0000:02:00): 13, Graphics Exception: ESR 0x514648=0x1e000e 0x514650=0x24 0x514644=0x13eff2 0x51464c=0x7f
[ 167.367362] NVRM: Xid (PCI:0000:02:00): 13, Graphics Exception: ChID 0010, Class 0000a0c0, Offset 00001b0c, Data 00000000
[ 167.709832] NVRM: GPU at PCI:0000:02:00: GPU-a503e5ff-3740-8318-878a-a21e528c646c
[ 167.709836] NVRM: Xid (PCI:0000:02:00): 31, Ch 00000010, engmask 00000111, intr 10000000
[ 168.045998] NVRM: GPU at PCI:0000:02:00: GPU-a503e5ff-3740-8318-878a-a21e528c646c
[ 168.046003] NVRM: Xid (PCI:0000:02:00): 31, Ch 00000010, engmask 00000111, intr 10000000
[ 168.407864] NVRM: GPU at PCI:0000:02:00: GPU-a503e5ff-3740-8318-878a-a21e528c646c
[ 168.407869] NVRM: Xid (PCI:0000:02:00): 31, Ch 00000010, engmask 00000111, intr 10000000
[ 168.752045] NVRM: GPU at PCI:0000:02:00: GPU-a503e5ff-3740-8318-878a-a21e528c646c
[ 168.752049] NVRM: Xid (PCI:0000:02:00): 31, Ch 00000010, engmask 00000111, intr 10000000
[ 169.110574] NVRM: GPU at PCI:0000:02:00: GPU-a503e5ff-3740-8318-878a-a21e528c646c
[ 169.110578] NVRM: Xid (PCI:0000:02:00): 31, Ch 00000010, engmask 00000111, intr 10000000
[ 169.479404] NVRM: GPU at PCI:0000:02:00: GPU-a503e5ff-3740-8318-878a-a21e528c646c
[ 169.479408] NVRM: Xid (PCI:0000:02:00): 31, Ch 00000010, engmask 00000111, intr 10000000
[ 169.819896] NVRM: GPU at PCI:0000:02:00: GPU-a503e5ff-3740-8318-878a-a21e528c646c
[ 169.819900] NVRM: Xid (PCI:0000:02:00): 31, Ch 00000010, engmask 00000111, intr 10000000
[ 529.780140] usb 2-1.6: USB disconnect, device number 4
[ 530.008396] usb 2-1.6: new low-speed USB device number 7 using ehci-pci
[ 530.105253] usb 2-1.6: New USB device found, idVendor=045e, idProduct=0084
[ 530.105258] usb 2-1.6: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 530.105260] usb 2-1.6: Product: Microsoft Basic Optical Mouse
[ 530.105263] usb 2-1.6: Manufacturer: Microsoft
[ 530.109030] input: Microsoft Microsoft Basic Optical Mouse as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.6/2-1.6:1.0/0003:045E:0084.0003/input/input21
[ 530.109415] hid-generic 0003:045E:0084.0003: input,hidraw1: USB HID v1.11 Mouse [Microsoft Microsoft Basic Optical Mouse ] on usb-0000:00:1d.0-1.6/input0
[ 790.118073] NVRM: GPU at PCI:0000:02:00: GPU-a503e5ff-3740-8318-878a-a21e528c646c
[ 790.118077] NVRM: Xid (PCI:0000:02:00): 31, Ch 00000018, engmask 00000101, intr 10000000
[ 790.213339] NVRM: Xid (PCI:0000:02:00): 31, Ch 00000018, engmask 00000101, intr 10000000
[ 790.308416] NVRM: Xid (PCI:0000:02:00): 31, Ch 00000018, engmask 00000101, intr 10000000
[ 790.421164] NVRM: Xid (PCI:0000:02:00): 31, Ch 00000018, engmask 00000101, intr 10000000
[ 790.521354] NVRM: Xid (PCI:0000:02:00): 31, Ch 00000018, engmask 00000101, intr 10000000
[ 790.620486] NVRM: Xid (PCI:0000:02:00): 31, Ch 00000018, engmask 00000101, intr 10000000
[ 790.712321] NVRM: Xid (PCI:0000:02:00): 31, Ch 00000018, engmask 00000101, intr 10000000
[ 790.808216] NVRM: Xid (PCI:0000:02:00): 31, Ch 00000018, engmask 00000101, intr 10000000
e sempre que eu tento colocar alguma carga significativa no sistema (por exemplo, construindo o projeto fonte a partir de fontes) - tudo tende a congelar ou atrasar terrivelmente, incluindo a interface do usuário normalmente. Isso não costumava acontecer.
Por outro lado, eu também recentemente tenho apt-get upgrade d com uma nova versão do kernel do Linux (qualquer que seja a distribuição, não personalizada).
Minhas perguntas são: