Ciao a tutti,
come da oggetto l'avvio del sistema diventa molto lento se il lettore CD è
collegato (SATA).
Su google ho visto che dovrebbe essere un problema di udev [1]
dodo@debian:~$ uname -a
Linux debian 3.0.0-1-amd64 #1 SMP Sat Aug 27 16:21:11 UTC 2011 x86_64
GNU/Linux
dodo@debian:~$ dpkg -l |grep libudev
ii libgudev-1.0-0 172-1
GObject-based wrapper library for libudev
ii libudev0 172-1
libudev shared library
- dmesg con CD collegato
...
[ 2.065660] input: Logitech USB Optical Mouse as
/devices/pci0000:00/0000:00:12.2/usb1/1-4/1-4.1/1-4.1:1.0/input/input0
[ 2.065732] generic-usb 0003:046D:C047.0001: input,hidraw0: USB HID v1.10
Mouse [Logitech USB Optical Mouse] on usb-0000:00:12.2-4.1/input0
[ 2.068679] input: Logitech Logitech USB Keyboard as
/devices/pci0000:00/0000:00:12.2/usb1/1-4/1-4.4/1-4.4:1.0/input/input1
[ 2.068747] generic-usb 0003:046D:C315.0002: input,hidraw1: USB HID v1.10
Keyboard [Logitech Logitech USB Keyboard] on usb-0000:00:12.2-4.4/input0
[ 2.068762] usbcore: registered new interface driver usbhid
[ 2.068763] usbhid: USB HID core driver
[ 2.106134] ata2.00: configured for UDMA/100
[ 2.908263] scsi 1:0:0:0: CD-ROM TSSTcorp CDDVDW SH-S223C
SB04 PQ: 0 ANSI: 5
[ 2.917929] sd 0:0:0:0: [sda] 1953525168 512-byte logical blocks: (1.00
TB/931 GiB)
[ 2.917963] sd 0:0:0:0: [sda] Write Protect is off
[ 2.917966] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
[ 2.917981] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled,
doesn't support DPO or FUA
[ 2.945744] sda: sda1 sda2
[ 2.946040] sd 0:0:0:0: [sda] Attached SCSI disk
[ 2.947463] sd 0:0:0:0: Attached scsi generic sg0 type 0
[ 2.947492] sr 1:0:0:0: Attached scsi generic sg1 type 5
[ 2.950374] sr0: scsi3-mmc drive: 52x/52x writer dvd-ram cd/rw xa/form2
cdda tray
[ 2.950378] cdrom: Uniform CD-ROM driver Revision: 3.20
[ 2.950497] sr 1:0:0:0: Attached scsi CD-ROM sr0
[ 33.824042] ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6
frozen
[ 33.824072] ata2.00: failed command: IDENTIFY PACKET DEVICE
[ 33.824099] ata2.00: cmd a1/00:01:00:00:00/00:00:00:00:00/00 tag 0 pio
512 in
[ 33.824101] res 40/00:03:00:00:00/00:00:00:00:00/a0 Emask 0x4
(timeout)
[ 33.824150] ata2.00: status: { DRDY }
[ 33.824176] ata2: hard resetting link
[ 34.316040] ata2: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
[ 35.118257] ata2.00: configured for UDMA/100
[ 35.919042] ata2: EH complete
[ 66.848058] ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6
frozen
[ 66.848088] ata2.00: failed command: IDENTIFY PACKET DEVICE
[ 66.848116] ata2.00: cmd a1/00:01:00:00:00/00:00:00:00:00/00 tag 0 pio
512 in
[ 66.848117] res 40/00:03:00:00:00/00:00:00:00:00/a0 Emask 0x4
(timeout)
[ 66.848167] ata2.00: status: { DRDY }
[ 66.848193] ata2: hard resetting link
[ 67.340056] ata2: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
[ 68.142299] ata2.00: configured for UDMA/100
[ 68.943112] ata2: EH complete
[ 69.134067] PM: Starting manual resume from disk
[ 69.134070] PM: Hibernation image partition 8:1 present
[ 69.134072] PM: Looking for hibernation image.
[ 69.144316] PM: Image not found (code -22)
[ 69.144319] PM: Hibernation image not present or could not be loaded.
[ 69.264503] EXT4-fs (sda2): mounted filesystem with ordered data mode.
Opts: (null)
...
dodo@debian:~$ time /lib/udev/ata_id --export /dev/sr0
ID_ATA=1
ID_TYPE=cd
ID_BUS=ata
ID_MODEL=TSSTcorp_CDDVDW_SH-S223C
ID_MODEL_ENC=TSSTcorp\x20CDDVDW\x20SH-S223C\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20
ID_REVISION=SB04
ID_SERIAL=TSSTcorp_CDDVDW_SH-S223C_R4136GHZ822046
ID_SERIAL_SHORT=R4136GHZ822046
real 0m0.008s
user 0m0.000s
sys 0m0.000s
Se scollego il CD il sistema si avvia molto velocemente.
Ovviamente il lettore CD funziona, ho installato Wheezy proprio da questo
lettore.
Avete un'idea di come risolvere il problema?
Il lettore CD lo uso molto poco quindi potrei anche lasciarlo staccato, però
mi piacerebbe capire e risolvere il problema.
Grazie in anticipo
Edoardo
[1] https://bugzilla.redhat.com/show_bug.cgi?id=684599
