Hi, I don't know if I did the right steps, currently I'm having problems trying to make Intel Classmate suspend/resume work with newer kernels (In this case 2.6.25-rc2+ latest checkout = 5d9c4a7de64d398604a978d267a6987f1f4025b7). After resume, the usb devices still get reenumerated even with USB-Persist enabled, making the root device (sda) being lost as it gets redetected as sdb. It is not a regression, as I tested with a kernel between 2.6.22/2.6.23 release (git) right after persist was added and the same occurs. This is similar to the problem we had some time ago with 2.6.17 kernel, but that would only happen if you had some usb device attached to the usb ports (hub powered on).
I enabled persist doing echo 1 > /sys/devices/(...)/power/persist for the device, is there something else required? The device also has the USB_QUIRK_RESET_RESUME quirk enabled, that from what I debugged until now seems required. This is a full log example (with CONFIG_USB_DEBUG enabled): netconsole: network logging started PM: Syncing filesystems ... done. Freezing user space processes ... (elapsed 0.01 seconds) done. Freezing remaining freezable tasks ... (elapsed 0.00 seconds) done. ACPI: Preparing to enter system sleep state S3 Suspending console(s) uhci_hcd 0000:00:1d.1: release dev 2 ep81-INT, period 8, phase 4, 118 us uhci_hcd 0000:00:1d.1: release dev 2 ep82-INT, period 8, phase 4, 118 us usb 3-1: usb suspend usb 1-6: usb suspend usb 1-5: usb suspend usb 1-1: usb suspend hub 3-0:1.0: hub_suspend usb usb3: bus suspend usb usb3: suspend_rh hub 1-0:1.0: hub_suspend usb usb1: bus suspend ehci_hcd 0000:00:1d.7: suspend root hub drm_sysfs_suspend ACPI: PCI interrupt for device 0000:00:02.0 disabled ACPI handle has no context! ACPI handle has no context! ACPI: PCI interrupt for device 0000:00:1e.2 disabled ACPI: PCI interrupt for device 0000:00:1d.7 disabled ehci_hcd 0000:00:1d.7: --> PCI D3/wakeup uhci_hcd 0000:00:1d.3: uhci_suspend ACPI: PCI interrupt for device 0000:00:1d.3 disabled uhci_hcd 0000:00:1d.3: --> PCI D0/legacy uhci_hcd 0000:00:1d.2: uhci_suspend ACPI: PCI interrupt for device 0000:00:1d.2 disabled uhci_hcd 0000:00:1d.2: --> PCI D0/legacy uhci_hcd 0000:00:1d.1: uhci_suspend ACPI: PCI interrupt for device 0000:00:1d.1 disabled uhci_hcd 0000:00:1d.1: --> PCI D0/legacy uhci_hcd 0000:00:1d.0: uhci_suspend ACPI: PCI interrupt for device 0000:00:1d.0 disabled uhci_hcd 0000:00:1d.0: --> PCI D0/legacy Intel machine check architecture supported. Intel machine check reporting enabled on CPU#0. Back to C! PM: Writing back config space on device 0000:00:02.0 at offset 1 (was 900007, writing 900003) PM: Writing back config space on device 0000:00:1c.0 at offset f (was 20100, writing 2010a) ACPI: PCI Interrupt 0000:00:1c.0[A] -> GSI 16 (level, low) -> IRQ 16 PCI: Setting latency timer of device 0000:00:1c.0 to 64 uhci_hcd 0000:00:1d.0: PCI legacy resume ACPI: PCI Interrupt 0000:00:1d.0[A] -> GSI 23 (level, low) -> IRQ 23 PCI: Setting latency timer of device 0000:00:1d.0 to 64 uhci_hcd 0000:00:1d.0: uhci_resume uhci_hcd 0000:00:1d.0: uhci_check_and_reset_hc: legsup = 0x0f30 uhci_hcd 0000:00:1d.0: Performing full reset usb usb2: root hub lost power or was reset usb usb2: suspend_rh uhci_hcd 0000:00:1d.1: PCI legacy resume ACPI: PCI Interrupt 0000:00:1d.1[B] -> GSI 19 (level, low) -> IRQ 19 PCI: Setting latency timer of device 0000:00:1d.1 to 64 uhci_hcd 0000:00:1d.1: uhci_resume uhci_hcd 0000:00:1d.1: uhci_check_and_reset_hc: legsup = 0x0030 uhci_hcd 0000:00:1d.1: Performing full reset usb usb3: root hub lost power or was reset usb usb3: suspend_rh uhci_hcd 0000:00:1d.2: PCI legacy resume ACPI: PCI Interrupt 0000:00:1d.2[C] -> GSI 18 (level, low) -> IRQ 18 PCI: Setting latency timer of device 0000:00:1d.2 to 64 uhci_hcd 0000:00:1d.2: uhci_resume uhci_hcd 0000:00:1d.2: uhci_check_and_reset_hc: legsup = 0x0030 uhci_hcd 0000:00:1d.2: Performing full reset usb usb4: root hub lost power or was reset usb usb4: suspend_rh uhci_hcd 0000:00:1d.3: PCI legacy resume ACPI: PCI Interrupt 0000:00:1d.3[D] -> GSI 16 (level, low) -> IRQ 16 hub 1-0:1.0: logical disconnect on port 5 uhci_hcd 0000:00:1d.1: reserve dev 2 ep81-INT, period 8, phase 4, 118 us uhci_hcd 0000:00:1d.1: reserve dev 2 ep82-INT, period 8, phase 4, 118 us <7>hub 1-0:1.0: state 7 ports 8 chg 0062 evt 0000 usb 1-1: uevent EXT3-fs error (device sda1): ext3_find_entry: reading directory #7201 offset 0 Buffer I/O error on device sda1, logical block 0 lost page write due to I/O error on sda1 EXT3-fs error (device sda1): ext3_find_entry: reading directory #7201 offset 0 ------------[ cut here ]------------ WARNING: at fs/buffer.c:1184 mark_buffer_dirty+0x5d/0x80() Modules linked in: netconsole af_packet ipv6 snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device snd_pcm_oss snd_mixer_oss binfmt_misc rtc_cmos rtc_core rtc_lib snd_intel8x0 pcspkr snd_ac97_codec i2c_i801 ac97_bus? write_msg+0xcc/0xf0 [netconsole] [<c0123c54>] ? __call_console_drivers+0x54/0x70 [<c0123ce9>] ? _call_console_drivers+0x79/0x90 [<c0123f19>] ? release_console_sem+0x1d9/0x210 [<c0124320>] ? vprintk+0x210/0x3e0 [<c0124320>] ? vprintk+0x210/0x3e0 [<c01f4ff3>] ? generic_unplug_device+0x23/0x40 [<c0198d9d>] mark_buffer_dirty+0x5d/0x80 [<c01c71b6>] ext3_commit_super+0x46/0x70 [<c01c7b25>] ext3_handle_error+0x75/0xb0 [<c012450b>] ? printk+0x1b/0x20 [<c01c7c22>] ext3_error+0x52/0x60 [<c01c5788>] ext3_find_entry+0x518/0x670 [<c0200cd8>] ? rb_insert_color+0xb8/0xe0 [<c0139e6e>] ? hrtimer_start+0x6e/0xf0 [<c0375f04>] ? schedule+0x2b4/0x460 [<c01c628a>] ext3_lookup+0x3a/0xd0 [<c017e483>] do_lookup+0x133/0x180 [<c017f7ec>] __link_path_walk+0x12c/0xe10 [<c030d969>] ? kfree_skb+0x19/0x30 [<c036d0ea>] ? unix_stream_recvmsg+0x39a/0x530 [<c0180510>] link_path_walk+0x40/0xa0 [<c0162049>] ? handle_mm_fault+0xf9/0x5f0 [<c0174c31>] ? get_unused_fd_flags+0xc1/0x100 [<c0180588>] path_walk+0x18/0x20 [<c0180792>] do_path_lookup+0x82/0x1c0 [<c0177861>] ? get_empty_filp+0x61/0x130 [<c018135d>] __path_lookup_intent_open+0x4d/0x90 [<c018141f>] path_lookup_open+0x1f/0x30 [<c018151b>] open_namei+0x5b/0x620 [<c0153254>] ? unlock_page+0x24/0x30 [<c016021d>] ? __do_fault+0x17d/0x3d0 [<c0174f6c>] do_filp_open+0x2c/0x50 [<c0162049>] ? handle_mm_fault+0xf9/0x5f0 [<c0174c31>] ? get_unused_fd_flags+0xc1/0x100 [<c0174fd9>] do_sys_open+0x49/0xe0 [<c01750ac>] sys_open+0x1c/0x20 [<c0104d1e>] sysenter_past_esp+0x5f/0x85 [<c0370000>] ? wireless_spy_update+0xd0/0x110 ======================= ---[ end trace 4651522f53c979cc ]--- Buffer I/O error on device sda1, logical block 0 lost page write due to I/O error on sda1 done. input: AT Translated Set 2 keyboard as /class/input/input10 ehci_hcd 0000:00:1d.7: port 1 high speed ehci_hcd 0000:00:1d.7: GetStatus port 1 status 001005 POWER sig=se0 PE CONNECT usb 1-1: new high speed USB device using ehci_hcd and address 6 ehci_hcd 0000:00:1d.7: port 1 high speed ehci_hcd 0000:00:1d.7: GetStatus port 1 status 001005 POWER sig=se0 PE CONNECT usb 1-1: USB quirks for this device: 2 usb 1-1: default language 0x0409 usb 1-1: uevent usb 1-1: usb_probe_device usb 1-1: configuration #1 chosen from 1 choice usb 1-1: adding 1-1:1.0 (config #1, interface 0) usb 1-1:1.0: uevent usb-storage 1-1:1.0: usb_probe_interface usb-storage 1-1:1.0: usb_probe_interface - got id scsi1 : SCSI emulation for USB Mass Storage devices drivers/usb/core/inode.c: creating file '006' usb 1-1: New USB device found, idVendor=08ec, idProduct=1000 usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 usb 1-1: Product: uDiskOnChip usb 1-1: Manufacturer: M-Systems usb 1-1: SerialNumber: 0FA14860F30378F8 ehci_hcd 0000:00:1d.7: GetStatus port 4 status 001803 POWER sig=j CSC CONNECT hub 1-0:1.0: port 4, status 0501, change 0001, 480 Mb/s usb-storage: device found at 6 usb-storage: waiting for device to settle before scanning hub 1-0:1.0: debounce: port 4: total 100ms stable 100ms status 0x501 ehci_hcd 0000:00:1d.7: port 4 high speed ehci_hcd 0000:00:1d.7: GetStatus port 4 status 001005 POWER sig=se0 PE CONNECT usb 1-4: new high speed USB device using ehci_hcd and address 7 ehci_hcd 0000:00:1d.7: port 4 high speed ehci_hcd 0000:00:1d.7: GetStatus port 4 status 001005 POWER sig=se0 PE CONNECT usb 1-4: default language 0x0409 usb 1-4: uevent usb 1-4: usb_probe_device usb 1-4: configuration #1 chosen from 1 choice usb 1-4: adding 1-4:1.0 (config #1, interface 0) usb 1-4:1.0: uevent usb-storage 1-4:1.0: usb_probe_interface usb-storage 1-4:1.0: usb_probe_interface - got id scsi2 : SCSI emulation for USB Mass Storage devices drivers/usb/core/inode.c: creating file '007' usb 1-4: New USB device found, idVendor=05e3, idProduct=0715 usb 1-4: New USB device strings: Mfr=3, Product=4, SerialNumber=5 usb 1-4: Product: USB Reader usb 1-4: Manufacturer: Genesys usb 1-4: SerialNumber: 000000000000 hub 1-0:1.0: port 5, status 0501, change 0000, 480 Mb/s usb 1-5: USB disconnect, address 4 usb 1-5: unregistering device usb 1-5: usb_disable_device nuking all URBs usb 1-5: unregistering interface 1-5:1.0 usb 1-5:1.0: uevent usb 1-5: uevent usb-storage: device found at 7 usb-storage: waiting for device to settle before scanning ehci_hcd 0000:00:1d.7: port 5 high speed ehci_hcd 0000:00:1d.7: GetStatus port 5 status 001005 POWER sig=se0 PE CONNECT usb 1-5: new high speed USB device using ehci_hcd and address 8 ehci_hcd 0000:00:1d.7: port 5 high speed ehci_hcd 0000:00:1d.7: GetStatus port 5 status 001005 POWER sig=se0 PE CONNECT usb 1-5: default language 0x0409 usb 1-5: uevent usb 1-5: usb_probe_device usb 1-5: configuration #1 chosen from 1 choice usb 1-5: adding 1-5:1.0 (config #1, interface 0) usb 1-5:1.0: uevent drivers/usb/core/inode.c: creating file '008' usb 1-5: New USB device found, idVendor=148f, idProduct=2573 usb 1-5: New USB device strings: Mfr=1, Product=2, SerialNumber=3 usb 1-5: Product: 802.11 bg WLAN usb 1-5: Manufacturer: Ralink hub 1-0:1.0: port 6, status 0501, change 0000, 480 Mb/s usb 1-6: USB disconnect, address 5 usb 1-6: unregistering device usb 1-6: usb_disable_device nuking all URBs usb 1-6: unregistering interface 1-6:1.0 usb 1-6:1.0: uevent usb 1-6: unregistering interface 1-6:1.1 usb 1-6:1.1: uevent usb 1-6: uevent ehci_hcd 0000:00:1d.7: port 6 high speed ehci_hcd 0000:00:1d.7: GetStatus port 6 status 001005 POWER sig=se0 PE CONNECT usb 1-6: new high speed USB device using ehci_hcd and address 9 ehci_hcd 0000:00:1d.7: port 6 high speed ehci_hcd 0000:00:1d.7: GetStatus port 6 status 001005 POWER sig=se0 PE CONNECT usb 1-6: skipped 1 descriptor after configuration usb 1-6: skipped 5 descriptors after interface usb 1-6: skipped 1 descriptor after endpoint usb 1-6: skipped 9 descriptors after interface usb 1-6: default language 0x0409 usb 1-6: uevent usb 1-6: usb_probe_device usb 1-6: configuration #1 chosen from 1 choice usb 1-6: adding 1-6:1.0 (config #1, interface 0) usb 1-6:1.0: uevent usb 1-6: adding 1-6:1.1 (config #1, interface 1) usb 1-6:1.1: uevent drivers/usb/core/inode.c: creating file '009' usb 1-6: New USB device found, idVendor=0ac8, idProduct=c312 usb 1-6: New USB device strings: Mfr=1, Product=2, SerialNumber=0 usb 1-6: Product: Sirius USB2.0 Camera usb 1-6: Manufacturer: Vimicro Corp. hub 2-0:1.0: state 7 ports 2 chg 0000 evt 0000 hub 3-0:1.0: state 7 ports 2 chg 0000 evt 0002 hub 4-0:1.0: state 7 ports 2 chg 0000 evt 0000 hub 5-0:1.0: state 7 ports 2 chg 0000 evt 0000 hub 2-0:1.0: hub_suspend usb usb2: bus auto-suspend usb usb2: suspend_rh hub 4-0:1.0: hub_suspend usb usb4: bus auto-suspend usb usb4: suspend_rh hub 5-0:1.0: hub_suspend usb usb5: bus auto-suspend usb usb5: suspend_rh scsi 1:0:0:0: Direct-Access M-Sys uDiskOnChip 5.u4 PQ: 0 ANSI: 0 CCS sd 1:0:0:0: [sdb] 2052607 512-byte hardware sectors (1051 MB) sd 1:0:0:0: [sdb] Write Protect is off sd 1:0:0:0: [sdb] Mode Sense: 2b 00 00 00 sd 1:0:0:0: [sdb] Assuming drive cache: write through sd 1:0:0:0: [sdb] 2052607 512-byte hardware sectors (1051 MB) sd 1:0:0:0: [sdb] Write Protect is off sd 1:0:0:0: [sdb] Mode Sense: 2b 00 00 00 sd 1:0:0:0: [sdb] Assuming drive cache: write through sdb: sdb1 sd 1:0:0:0: [sdb] Attached SCSI disk sd 1:0:0:0: Attached scsi generic sg0 type 0 usb-storage: device scan complete scsi 2:0:0:0: Direct-Access Generic STORAGE DEVICE 9404 PQ: 0 ANSI: 0 sd 2:0:0:0: [sdc] Attached SCSI removable disk sd 2:0:0:0: Attached scsi generic sg1 type 0 usb-storage: device scan complete EXT3-fs error (device sda1): ext3_find_entry: reading directory #7201 offset 0 Buffer I/O error on device sda1, logical block 0 lost page write due to I/O error on sda1 EXT3-fs error (device sda1): ext3_find_entry: reading directory #8093 offset 0 Buffer I/O error on device sda1, logical block 0 lost page write due to I/O error on sda1 EXT3-fs error (device sda1): ext3_find_entry: reading directory #36001 offset 0 Buffer I/O error on device sda1, logical block 0 lost page write due to I/O error on sda1 EXT3-fs error (device sda1): ext3_find_entry: reading directory #8093 offset 0 Buffer I/O error on device sda1, logical block 0 lost page write due to I/O error on sda1 EXT3-fs error (device sda1): ext3_find_entry: reading directory #36001 offset 0 Buffer I/O error on device sda1, logical block 0 lost page write due to I/O error on sda1 SysRq : Resetting -- []'s Herton - 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