PROBLEMA
O Windows 2000 passou a entrar em modo de segurança em uma máquina e
aproveitei para convencer o usuário a usar Linux. Ao instalar o Linux
(tentei Debian Sarge e BR-CDD pre 6) mensagens de erro rolavam sem parar
na console (em todas que estivessem abilitadas) depois do primeiro boot
e impediam a conclusão da instalação. As mensagem de erro podem ser
vistas no final deste texto.
DIAGNÓSTICO
Estressei memória e CPU por 12 horas cada e nenhuma mensagem de erro foi
exibida. Analizando as mensagens de erro que rolavam na console, parecia
tratar-se de algum problema com o barramento USB.
A tentativa de desabilitar o uso de USB na BIOS falhou pois o Linux faz
o reconhecimento de hardware sem consultar a BIOS.
SOLUÇÃO
Todas as respostas obtidas na listan indicavam a utilização do parâmetro
*nousb* durante a instalação, mas mesmo que este parâmetro fosse
utilizado o problema persistia. Utilziar o parâmetro
debian-installer/probe/usb=fase também não resolvia
Pesquisando um pouco mais as mensagens de erro, descobri a URL
http://www.ic.unicamp.br/~norton/debian_acer_aspire_1355LC.html#memus
que indicava poder tratar-se de conflito entre USB e ACPI. Com isto
instalei o Sarge com a parametrização que se segue, considerando que meu
hardware não tem PCMCIA nem SCSI e que *o barramento USB realmente está
com problemas*
:linux26 nosub noacpi nopcmcia noscsi.
Apesar das mensagens de erro ainda surgirem uma ou duas vezes, o boot
prossegue normalmente. Assim, foi possível concluir a instalação do
Sarge e utilizá-lo (inclusive a interface gráfica).
CURIOSIDADE
Tinha uma impressora USB ligada na porta USB do micro e esta solução só
funcionou depois que eu desconectei o cabo. Se o cabo USB for colocado
de volta, mesmo com a impressora desligada, as mensagens de erro começam
a rolar de nova e o sistema não entra no ar. Alguém sabe por que isto
acontece? Suspeito que tenha algo haver com a sinalização nos
dispositivos USB, mas queria os detalhes.
------< mensagens de erro depois do primeiro boot >------
(...)
umount: /target/dev/pts: Invalid argument
umount: /target/dev/shm: Invalid argument
umount: /target/proc/bus/usb: Invalid argument
Reading Package Lists...
(...)
Aug 29 22:30:47 kernel: usbcore: registered new driver usbfs
Aug 29 22:30:47 kernel: usbcore: registered new driver hub
Aug 29 22:30:47 kernel: USB Universal Host Controller Interface
driver v2.2
Aug 29 22:30:47 kernel: PCI: Found IRQ 9 for device 0000:00:07.2
Aug 29 22:30:47 kernel: uhci_hcd 0000:00:07.2: Intel Corp.
82371AB/EB/MB
PIIX4 USB
Aug 29 22:30:47 kernel: uhci_hcd 0000:00:07.2: irq 9, io base
0000de00
Aug 29 22:30:47 kernel: uhci_hcd 0000:00:07.2: new USB bus
registered,
assigned bus number 1
Aug 29 22:30:47 kernel: hub 1-0:1.0: USB hub found
Aug 29 22:30:47 kernel: hub 1-0:1.0: 2 ports detected
Aug 29 22:30:47 kernel: usbcore: registered new driver usbkbd
Aug 29 22:30:47 kernel: drivers/usb/input/usbkbd.c: :USB HID Boot
Protocol keyboard driver
Aug 29 22:30:47 kernel: usbcore: registered new driver hiddev
Aug 29 22:30:47 kernel: usbcore: registered new driver usbhid
Aug 29 22:30:47 kernel: drivers/usb/input/hid-core.c: v2.0:USB HID
core
driver
Aug 29 22:30:47 kernel: drivers/usb/serial/usb-serial.c: USB Serial
support registered for Generic
Aug 29 22:30:47 kernel: usbcore: registered new driver
usbserial_generic
Aug 29 22:30:47 kernel: usbcore: registered new driver usbserial
Aug 29 22:30:47 kernel: drivers/usb/serial/usb-serial.c: USB Serial
Driver core v2.0
(...)
Aug 29 22:30:47 kernel: usb 1-1: new low speed USB device using
address 2
(...)
Aug 29 22:30:48 kernel: usb 1-1: device not accepting address 2,
error -71
Aug 29 22:30:48 kernel: usb 1-1: new low speed USB device using
address 3
(...)
Aug 29 22:30:48 kernel: usb 1-1: device not accepting address 3,
error -71
Aug 29 22:30:48 kernel: usb 1-2: new full speed USB device using
address 4
Aug 29 22:30:49 kernel: usb 1-1: new low speed USB device using
address 5
Aug 29 22:30:49 kernel: usb 1-1: device not accepting address 5,
error -71
Aug 29 22:30:49 kernel: usb 1-1: new low speed USB device using
address 6
Aug 29 22:30:50 kernel: usb 1-1: device not accepting address 6,
error -71
Aug 29 22:30:50 kernel: usb 1-2: USB disconnect, address 4
Aug 29 22:30:50 kernel: usb 1-2: new full speed USB device using
address 7
Aug 29 22:30:50 kernel: usb 1-1: new low speed USB device using
address 8
Aug 29 22:30:51 kernel: usb 1-1: device not accepting address 8,
error -71
Aug 29 22:30:51 kernel: usb 1-1: new low speed USB device using
address 9
Aug 29 22:30:51 kernel: usb 1-1: device not accepting address 9,
error -71
Aug 29 22:30:51 kernel: usb 1-2: USB disconnect, address 7
Aug 29 22:30:51 kernel: usb 1-2: new full speed USB device using
address 10
Aug 29 22:30:52 kernel: usb 1-1: new low speed USB device using
address 11
Aug 29 22:30:52 kernel: usb 1-1: device not accepting address 11,
error -71
Aug 29 22:30:52 kernel: usb 1-1: new low speed USB device using
address 12
(...)
Aug 29 22:30:52 kernel: usb 1-1: device not accepting address 12,
error -71
Aug 29 22:30:52 kernel: usb 1-2: USB disconnect, address 10
Aug 29 22:30:53 kernel: usb 1-2: new full speed USB device using
address 13
Aug 29 22:30:53 kernel: usb 1-1: new low speed USB device using
address 14
Aug 29 22:30:53 kernel: usb 1-1: device not accepting address 14,
error -71
Aug 29 22:30:53 kernel: usb 1-1: new low speed USB device using
address 15
Aug 29 22:30:54 kernel: usb 1-1: device not accepting address 15,
error -71
Aug 29 22:30:54 kernel: usb 1-2: USB disconnect, address 13
Aug 29 22:30:54 kernel: usb 1-2: new full speed USB device using
address 16
Aug 29 22:30:54 kernel: usb 1-1: new low speed USB device using
address 17
Aug 29 22:30:55 kernel: usb 1-1: device not accepting address 17,
error -71
Aug 29 22:30:55 kernel: usb 1-1: new low speed USB device using
address 18
Aug 29 22:30:55 kernel: usb 1-1: device not accepting address 18,
error -71
Aug 29 22:30:55 kernel: usb 1-2: USB disconnect, address 16
Aug 29 22:30:55 kernel: usb 1-2: new full speed USB device using
address 19
Aug 29 22:30:56 kernel: usb 1-1: new low speed USB device using
address 20
Aug 29 22:30:56 kernel: usb 1-1: device not accepting address 20,
error -71
Aug 29 22:30:56 kernel: usb 1-1: new low speed USB device using
address 21
Aug 29 22:30:57 kernel: usb 1-1: device not accepting address 21,
error -71
Aug 29 22:30:57 kernel: usb 1-2: USB disconnect, address 19
Aug 29 22:30:57 kernel: usb 1-2: new full speed USB device using
address 22
Aug 29 22:30:57 kernel: usb 1-1: new low speed USB device using
address 23
Aug 29 22:30:57 kernel: usb 1-1: device not accepting address 23,
error -71
Aug 29 22:30:58 kernel: usb 1-1: new low speed USB device using
address 24
Aug 29 22:30:58 kernel: usb 1-1: device not accepting address 24,
error -71
Aug 29 22:30:58 kernel: usb 1-2: USB disconnect, address 22
Aug 29 22:30:58 kernel: usb 1-2: new full speed USB device using
address 25
Aug 29 22:30:58 kernel: usb 1-1: new low speed USB device using
address 26
Aug 29 22:30:59 kernel: usb 1-1: device not accepting address 26,
error -71
Aug 29 22:30:59 kernel: usb 1-1: new low speed USB device using
address 27
(...)
Aug 29 22:30:59 kernel: usb 1-1: device not accepting address 27,
error -71
Aug 29 22:30:59 kernel: usb 1-2: USB disconnect, address 25
Aug 29 22:31:00 kernel: usb 1-2: new full speed USB device using
address 28
Aug 29 22:31:00 kernel: usb 1-1: new low speed USB device using
address 29
Aug 29 22:31:00 kernel: usb 1-1: device not accepting address 29,
error -71
Aug 29 22:31:00 kernel: usb 1-1: new low speed USB device using
address 30
Aug 29 22:31:01 kernel: usb 1-1: device not accepting address 30,
error -71
Aug 29 22:31:01 kernel: usb 1-2: USB disconnect, address 28
(...)
Aug 29 22:31:01 kernel: usb 1-1: new low speed USB device using
address 32
Aug 29 22:31:02 kernel: usb 1-1: device not accepting address 32,
error -71
Aug 29 22:31:02 kernel: usb 1-1: new low speed USB device using
address 33
Aug 29 22:31:02 kernel: usb 1-1: device not accepting address 33,
error -71
Aug 29 22:31:02 kernel: usb 1-2: USB disconnect, address 31
Aug 29 22:31:02 kernel: usb 1-2: new full speed USB device using
address 34
Aug 29 22:31:03 kernel: usb 1-1: new low speed USB device using
address 35
Aug 29 22:31:03 kernel: usb 1-1: device not accepting address 35,
error -71
Aug 29 22:31:03 kernel: usb 1-1: new low speed USB device using
address 36
(...)
Aug 29 22:31:03 kernel: usb 1-1: device not accepting address 36,
error -71
Aug 29 22:31:03 kernel: usb 1-2: USB disconnect, address 34
(...)
Aug 29 22:31:04 kernel: usb 1-2: new full speed USB device using
address 37
Aug 29 22:31:04 kernel: usb 1-1: new low speed USB device using
address 38
Aug 29 22:31:04 kernel: usb 1-1: device not accepting address 38,
error -71
Aug 29 22:31:04 kernel: usb 1-1: new low speed USB device using
address 39
Aug 29 22:31:05 kernel: usb 1-1: device not accepting address 39,
error -71
Aug 29 22:31:05 kernel: usb 1-2: USB disconnect, address 37
(...)
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