Считыватель SD-карт иногда не обнаруживается

У меня есть устройство чтения карт Realtek SD на Ubuntu, и происходит нечто странное: иногда она распознает SD-карту, иногда она вообще не выполняет никаких действий после ее помещения внутрь, а иногда показывает, исчезает, затем показывает, а затем исчезает и так далее, вот dmesg, когда это происходит:

[  705.838650] usb 1-1.2: new high-speed USB device number 4 using ehci_hcd
[  706.414218] usb 1-1.2: device not accepting address 4, error -71
[  706.430772] hub 1-1:1.0: unable to enumerate USB device on port 2
[  707.633972] usb 1-1.2: new high-speed USB device number 6 using ehci_hcd
[  707.662063] hub 1-1:1.0: unable to enumerate USB device on port 2
[  707.831366] ieee80211 phy0: START: tid 1 is not agg'able
[  707.889873] usb 1-1.2: new high-speed USB device number 7 using ehci_hcd
[  707.918216] hub 1-1:1.0: unable to enumerate USB device on port 2
[  708.209589] usb 1-1.2: new high-speed USB device number 8 using ehci_hcd
[  708.400918] usb 1-1.2: New USB device found, idVendor=0bda, idProduct=0159
[  708.400923] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  708.400927] usb 1-1.2: Product: USB2.0-CRW
[  708.400930] usb 1-1.2: Manufacturer: Generic
[  708.400934] usb 1-1.2: SerialNumber: 20071114173400000
[  708.465062] Initializing USB Mass Storage driver...
[  708.465154] usbcore: registered new interface driver usb-storage
[  708.465156] USB Mass Storage support registered.
[  708.477041] scsi4 : usb-storage 1-1.2:1.0
[  708.477213] usbcore: registered new interface driver ums-realtek
[  709.475917] scsi 4:0:0:0: Direct-Access     Generic- Multi-Card       1.00 PQ: 0 ANSI: 0 CCS
[  709.477769] sd 4:0:0:0: Attached scsi generic sg2 type 0
[  710.131709] sd 4:0:0:0: [sdb] 3862528 512-byte logical blocks: (1.97 GB/1.84 GiB)
[  710.132653] sd 4:0:0:0: [sdb] Write Protect is off
[  710.132660] sd 4:0:0:0: [sdb] Mode Sense: 03 00 00 00
[  710.133694] sd 4:0:0:0: [sdb] No Caching mode page found
[  710.133703] sd 4:0:0:0: [sdb] Assuming drive cache: write through
[  710.137908] sd 4:0:0:0: [sdb] No Caching mode page found
[  710.137916] sd 4:0:0:0: [sdb] Assuming drive cache: write through
[  710.140549]  sdb:
[  710.143263] sd 4:0:0:0: [sdb] No Caching mode page found
[  710.143273] sd 4:0:0:0: [sdb] Assuming drive cache: write through
[  710.143282] sd 4:0:0:0: [sdb] Attached SCSI removable disk
[  711.981919] ieee80211 phy0: START: tid 1 is not agg'able
[  758.520811] ieee80211 phy0: START: tid 1 is not agg'able
[  803.770458] ieee80211 phy0: START: tid 1 is not agg'able
[  864.246875] usb 1-1.2: USB disconnect, device number 8
[  868.352881] usb 1-1.2: new high-speed USB device number 9 using ehci_hcd
[  869.076446] usb 1-1.2: device not accepting address 9, error -71
[  869.093016] hub 1-1:1.0: unable to enumerate USB device on port 2
[  869.292653] usb 1-1.2: new high-speed USB device number 11 using ehci_hcd
[  869.320734] hub 1-1:1.0: unable to enumerate USB device on port 2
[  869.520610] usb 1-1.2: new high-speed USB device number 12 using ehci_hcd
[  869.711736] usb 1-1.2: New USB device found, idVendor=0bda, idProduct=0159
[  869.711741] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  869.711745] usb 1-1.2: Product: USB2.0-CRW
[  869.711748] usb 1-1.2: Manufacturer: Generic
[  869.711752] usb 1-1.2: SerialNumber: 20071114173400000
[  869.727659] scsi5 : usb-storage 1-1.2:1.0
[  870.298259] usb 1-1.2: USB disconnect, device number 12
[  870.528192] usb 1-1.2: new high-speed USB device number 13 using ehci_hcd
[  870.556400] hub 1-1:1.0: unable to enumerate USB device on port 2
[  870.852071] usb 1-1.2: new high-speed USB device number 14 using ehci_hcd
[  870.955243] usb 1-1.2: New USB device found, idVendor=0bda, idProduct=0159
[  870.955255] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  870.955264] usb 1-1.2: Product: USB2.0-CRW
[  870.955270] usb 1-1.2: Manufacturer: Generic
[  870.955275] usb 1-1.2: SerialNumber: 20071114173400000
[  870.972619] scsi6 : usb-storage 1-1.2:1.0
[  871.321878] usb 1-1.2: USB disconnect, device number 14
[  871.519682] usb 1-1.2: new high-speed USB device number 15 using ehci_hcd
[  871.864317] usb 1-1.2: New USB device found, idVendor=0bda, idProduct=0159
[  871.864323] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  871.864327] usb 1-1.2: Product: USB2.0-CRW
[  871.864331] usb 1-1.2: Manufacturer: Generic
[  871.864334] usb 1-1.2: SerialNumber: 20071114173400000
[  871.880379] scsi7 : usb-storage 1-1.2:1.0
[  872.881868] scsi 7:0:0:0: Direct-Access     Generic- Multi-Card       1.00 PQ: 0 ANSI: 0 CCS
[  872.883394] sd 7:0:0:0: Attached scsi generic sg2 type 0
[  873.537359] sd 7:0:0:0: [sdb] 3862528 512-byte logical blocks: (1.97 GB/1.84 GiB)
[  873.538175] sd 7:0:0:0: [sdb] Write Protect is off
[  873.538182] sd 7:0:0:0: [sdb] Mode Sense: 03 00 00 00
[  873.539099] sd 7:0:0:0: [sdb] No Caching mode page found
[  873.539107] sd 7:0:0:0: [sdb] Assuming drive cache: write through
[  873.543066] sd 7:0:0:0: [sdb] No Caching mode page found
[  873.543074] sd 7:0:0:0: [sdb] Assuming drive cache: write through
[  873.545698]  sdb:
[  873.548954] sd 7:0:0:0: [sdb] No Caching mode page found
[  873.548964] sd 7:0:0:0: [sdb] Assuming drive cache: write through
[  873.548973] sd 7:0:0:0: [sdb] Attached SCSI removable disk
[  874.904666] usb 1-1.2: USB disconnect, device number 15
[  875.138300] usb 1-1.2: new high-speed USB device number 16 using ehci_hcd
[  875.377589] usb 1-1.2: New USB device found, idVendor=0bda, idProduct=0159
[  875.377597] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  875.377602] usb 1-1.2: Product: USB2.0-CRW
[  875.377606] usb 1-1.2: Manufacturer: Generic
[  875.377611] usb 1-1.2: SerialNumber: 20071114173400000
[  875.395620] scsi8 : usb-storage 1-1.2:1.0
[  876.396676] scsi 8:0:0:0: Direct-Access     Generic- Multi-Card       1.00 PQ: 0 ANSI: 0 CCS
[  876.398308] sd 8:0:0:0: Attached scsi generic sg2 type 0
[  877.050200] sd 8:0:0:0: [sdb] 3862528 512-byte logical blocks: (1.97 GB/1.84 GiB)
[  877.050941] sd 8:0:0:0: [sdb] Write Protect is off
[  877.050944] sd 8:0:0:0: [sdb] Mode Sense: 03 00 00 00
[  877.051688] sd 8:0:0:0: [sdb] No Caching mode page found
[  877.051692] sd 8:0:0:0: [sdb] Assuming drive cache: write through
[  877.055466] sd 8:0:0:0: [sdb] No Caching mode page found
[  877.055474] sd 8:0:0:0: [sdb] Assuming drive cache: write through
[  877.057980]  sdb:
[  877.060539] sd 8:0:0:0: [sdb] No Caching mode page found
[  877.060543] sd 8:0:0:0: [sdb] Assuming drive cache: write through
[  877.060547] sd 8:0:0:0: [sdb] Attached SCSI removable disk
[  881.302111] usb 1-1.2: USB disconnect, device number 16
[  881.503917] usb 1-1.2: new high-speed USB device number 17 using ehci_hcd
[  881.532168] hub 1-1:1.0: unable to enumerate USB device on port 2
[  882.011722] usb 1-1.2: new high-speed USB device number 18 using ehci_hcd
[  882.357797] usb 1-1.2: New USB device found, idVendor=0bda, idProduct=0159
[  882.357809] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  882.357818] usb 1-1.2: Product: USB2.0-CRW
[  882.357825] usb 1-1.2: Manufacturer: Generic
[  882.357833] usb 1-1.2: SerialNumber: 20071114173400000
[  882.374033] scsi9 : usb-storage 1-1.2:1.0
[  882.581646] usb 1-1.2: USB disconnect, device number 18
[  882.811432] usb 1-1.2: new high-speed USB device number 19 using ehci_hcd
[  882.914521] usb 1-1.2: New USB device found, idVendor=0bda, idProduct=0159
[  882.914531] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  882.914537] usb 1-1.2: Product: USB2.0-CRW
[  882.914542] usb 1-1.2: Manufacturer: Generic
[  882.914547] usb 1-1.2: SerialNumber: 20071114173400000
[  882.930544] scsi10 : usb-storage 1-1.2:1.0
[  883.929510] scsi 10:0:0:0: Direct-Access     Generic- Multi-Card       1.00 PQ: 0 ANSI: 0 CCS
[  883.931691] sd 10:0:0:0: Attached scsi generic sg2 type 0
[  884.587645] sd 10:0:0:0: [sdb] 3862528 512-byte logical blocks: (1.97 GB/1.84 GiB)
[  884.588629] sd 10:0:0:0: [sdb] Write Protect is off
[  884.588638] sd 10:0:0:0: [sdb] Mode Sense: 03 00 00 00
[  884.589669] sd 10:0:0:0: [sdb] No Caching mode page found
[  884.589676] sd 10:0:0:0: [sdb] Assuming drive cache: write through
[  884.593775] sd 10:0:0:0: [sdb] No Caching mode page found
[  884.593783] sd 10:0:0:0: [sdb] Assuming drive cache: write through
[  884.596418]  sdb:
[  884.599118] sd 10:0:0:0: [sdb] No Caching mode page found
[  884.599128] sd 10:0:0:0: [sdb] Assuming drive cache: write through
[  884.599137] sd 10:0:0:0: [sdb] Attached SCSI removable disk
[  903.309949] usb 1-1.2: USB disconnect, device number 19
[  903.607560] usb 1-1.2: new high-speed USB device number 20 using ehci_hcd
[  903.710767] usb 1-1.2: New USB device found, idVendor=0bda, idProduct=0159
[  903.710776] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  903.710782] usb 1-1.2: Product: USB2.0-CRW
[  903.710787] usb 1-1.2: Manufacturer: Generic
[  903.710792] usb 1-1.2: SerialNumber: 20071114173400000
[  903.727273] scsi11 : usb-storage 1-1.2:1.0
[  904.729854] scsi 11:0:0:0: Direct-Access     Generic- Multi-Card       1.00 PQ: 0 ANSI: 0 CCS
[  904.731947] sd 11:0:0:0: Attached scsi generic sg2 type 0
[  905.383762] sd 11:0:0:0: [sdb] 3862528 512-byte logical blocks: (1.97 GB/1.84 GiB)
[  905.384680] sd 11:0:0:0: [sdb] Write Protect is off
[  905.384689] sd 11:0:0:0: [sdb] Mode Sense: 03 00 00 00
[  905.385534] sd 11:0:0:0: [sdb] No Caching mode page found
[  905.385541] sd 11:0:0:0: [sdb] Assuming drive cache: write through
[  905.389363] sd 11:0:0:0: [sdb] No Caching mode page found
[  905.389370] sd 11:0:0:0: [sdb] Assuming drive cache: write through
[  905.392128]  sdb:
[  905.395004] sd 11:0:0:0: [sdb] No Caching mode page found
[  905.395013] sd 11:0:0:0: [sdb] Assuming drive cache: write through
[  905.395022] sd 11:0:0:0: [sdb] Attached SCSI removable disk
[  910.475095] usb 1-1.2: USB disconnect, device number 20
[  910.676778] usb 1-1.2: new high-speed USB device number 21 using ehci_hcd
[  910.780962] usb 1-1.2: device descriptor read/all, error -71
[  910.797126] hub 1-1:1.0: unable to enumerate USB device on port 2
[  911.060764] usb 1-1.2: new high-speed USB device number 23 using ehci_hcd
[  911.164100] usb 1-1.2: New USB device found, idVendor=0bda, idProduct=0159
[  911.164105] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  911.164109] usb 1-1.2: Product: USB2.0-CRW
[  911.164112] usb 1-1.2: Manufacturer: Generic
[  911.164115] usb 1-1.2: SerialNumber: 20071114173400000
[  911.180142] scsi12 : usb-storage 1-1.2:1.0
[  912.178906] scsi 12:0:0:0: Direct-Access     Generic- Multi-Card       1.00 PQ: 0 ANSI: 0 CCS
[  912.180483] sd 12:0:0:0: Attached scsi generic sg2 type 0
[  912.971100] sd 12:0:0:0: [sdb] 3862528 512-byte logical blocks: (1.97 GB/1.84 GiB)
[  912.971950] sd 12:0:0:0: [sdb] Write Protect is off
[  912.971958] sd 12:0:0:0: [sdb] Mode Sense: 03 00 00 00
[  912.972797] sd 12:0:0:0: [sdb] No Caching mode page found
[  912.972806] sd 12:0:0:0: [sdb] Assuming drive cache: write through
[  912.976876] sd 12:0:0:0: [sdb] No Caching mode page found
[  912.976883] sd 12:0:0:0: [sdb] Assuming drive cache: write through
[  912.979529]  sdb:
[  912.982396] sd 12:0:0:0: [sdb] No Caching mode page found
[  912.982404] sd 12:0:0:0: [sdb] Assuming drive cache: write through
[  912.982410] sd 12:0:0:0: [sdb] Attached SCSI removable disk
[  913.545862] usb 1-1.2: USB disconnect, device number 23
[  913.603007] FAT-fs (sdb): Directory bread(block 480) failed
[  913.603014] FAT-fs (sdb): Directory bread(block 481) failed
[  913.603017] FAT-fs (sdb): Directory bread(block 482) failed
[  913.603020] FAT-fs (sdb): Directory bread(block 483) failed
[  913.603022] FAT-fs (sdb): Directory bread(block 484) failed
[  913.603025] FAT-fs (sdb): Directory bread(block 485) failed
[  913.603028] FAT-fs (sdb): Directory bread(block 486) failed
[  913.603031] FAT-fs (sdb): Directory bread(block 487) failed
[  913.603039] FAT-fs (sdb): Directory bread(block 488) failed
[  913.603041] FAT-fs (sdb): Directory bread(block 489) failed
[  913.751579] usb 1-1.2: new high-speed USB device number 24 using ehci_hcd
[  913.854799] usb 1-1.2: New USB device found, idVendor=0bda, idProduct=0159
[  913.854809] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  913.854815] usb 1-1.2: Product: USB2.0-CRW
[  913.854820] usb 1-1.2: Manufacturer: Generic
[  913.854825] usb 1-1.2: SerialNumber: 20071114173400000
[  913.870512] scsi13 : usb-storage 1-1.2:1.0
[  914.870204] scsi 13:0:0:0: Direct-Access     Generic- Multi-Card       1.00 PQ: 0 ANSI: 0 CCS
[  914.871962] sd 13:0:0:0: Attached scsi generic sg2 type 0
[  915.527587] sd 13:0:0:0: [sdb] 3862528 512-byte logical blocks: (1.97 GB/1.84 GiB)
[  915.528573] sd 13:0:0:0: [sdb] Write Protect is off
[  915.528580] sd 13:0:0:0: [sdb] Mode Sense: 03 00 00 00
[  915.529465] sd 13:0:0:0: [sdb] No Caching mode page found
[  915.529472] sd 13:0:0:0: [sdb] Assuming drive cache: write through
[  915.533706] sd 13:0:0:0: [sdb] No Caching mode page found
[  915.533714] sd 13:0:0:0: [sdb] Assuming drive cache: write through
[  915.536351]  sdb:
[  915.538993] sd 13:0:0:0: [sdb] No Caching mode page found
[  915.539003] sd 13:0:0:0: [sdb] Assuming drive cache: write through
[  915.539011] sd 13:0:0:0: [sdb] Attached SCSI removable disk
[  917.128586] usb 1-1.2: USB disconnect, device number 24
[  917.330211] usb 1-1.2: new high-speed USB device number 25 using ehci_hcd
[  917.433880] usb 1-1.2: New USB device found, idVendor=0bda, idProduct=0159
[  917.433889] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  917.433895] usb 1-1.2: Product: USB2.0-CRW
[  917.433901] usb 1-1.2: Manufacturer: Generic
[  917.433905] usb 1-1.2: SerialNumber: 20071114173400000
[  917.450314] scsi14 : usb-storage 1-1.2:1.0
[  918.152346] usb 1-1.2: USB disconnect, device number 25
[  918.413983] usb 1-1.2: new high-speed USB device number 26 using ehci_hcd
[  918.517339] usb 1-1.2: New USB device found, idVendor=0bda, idProduct=0159
[  918.517348] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  918.517354] usb 1-1.2: Product: USB2.0-CRW
[  918.517359] usb 1-1.2: Manufacturer: Generic
[  918.517364] usb 1-1.2: SerialNumber: 20071114173400000
[  918.533915] scsi15 : usb-storage 1-1.2:1.0
[  919.536259] scsi 15:0:0:0: Direct-Access     Generic- Multi-Card       1.00 PQ: 0 ANSI: 0 CCS
[  919.537814] sd 15:0:0:0: Attached scsi generic sg2 type 0
[  920.189983] sd 15:0:0:0: [sdb] 3862528 512-byte logical blocks: (1.97 GB/1.84 GiB)
[  920.190811] sd 15:0:0:0: [sdb] Write Protect is off
[  920.190821] sd 15:0:0:0: [sdb] Mode Sense: 03 00 00 00
[  920.191861] sd 15:0:0:0: [sdb] No Caching mode page found
[  920.191868] sd 15:0:0:0: [sdb] Assuming drive cache: write through
[  920.195942] sd 15:0:0:0: [sdb] No Caching mode page found
[  920.195949] sd 15:0:0:0: [sdb] Assuming drive cache: write through
[  920.198574]  sdb:
[  920.201426] sd 15:0:0:0: [sdb] No Caching mode page found
[  920.201434] sd 15:0:0:0: [sdb] Assuming drive cache: write through
[  920.201440] sd 15:0:0:0: [sdb] Attached SCSI removable disk
[  932.994597] usb 1-1.2: USB disconnect, device number 26
[  933.196287] usb 1-1.2: new high-speed USB device number 27 using ehci_hcd
[  933.299609] usb 1-1.2: New USB device found, idVendor=0bda, idProduct=0159
[  933.299615] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  933.299619] usb 1-1.2: Product: USB2.0-CRW
[  933.299622] usb 1-1.2: Manufacturer: Generic
[  933.299625] usb 1-1.2: SerialNumber: 20071114173400000
[  933.339045] scsi16 : usb-storage 1-1.2:1.0
[  933.506400] usb 1-1.2: USB disconnect, device number 27
[  933.704217] usb 1-1.2: new high-speed USB device number 28 using ehci_hcd
[  933.732609] hub 1-1:1.0: unable to enumerate USB device on port 2
[  934.088091] usb 1-1.2: new high-speed USB device number 29 using ehci_hcd
[  934.434187] usb 1-1.2: New USB device found, idVendor=0bda, idProduct=0159
[  934.434193] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  934.434197] usb 1-1.2: Product: USB2.0-CRW
[  934.434200] usb 1-1.2: Manufacturer: Generic
[  934.434204] usb 1-1.2: SerialNumber: 20071114173400000
[  934.450163] scsi17 : usb-storage 1-1.2:1.0
[  935.449929] scsi 17:0:0:0: Direct-Access     Generic- Multi-Card       1.00 PQ: 0 ANSI: 0 CCS
[  935.450619] sd 17:0:0:0: Attached scsi generic sg2 type 0
[  936.106902] sd 17:0:0:0: [sdb] 3862528 512-byte logical blocks: (1.97 GB/1.84 GiB)
[  936.107769] sd 17:0:0:0: [sdb] Write Protect is off
[  936.107772] sd 17:0:0:0: [sdb] Mode Sense: 03 00 00 00
[  936.108514] sd 17:0:0:0: [sdb] No Caching mode page found
[  936.108517] sd 17:0:0:0: [sdb] Assuming drive cache: write through
[  936.111920] sd 17:0:0:0: [sdb] No Caching mode page found
[  936.111927] sd 17:0:0:0: [sdb] Assuming drive cache: write through
[  936.114566]  sdb:
[  936.120989] sd 17:0:0:0: [sdb] No Caching mode page found
[  936.120995] sd 17:0:0:0: [sdb] Assuming drive cache: write through
[  936.120998] sd 17:0:0:0: [sdb] Attached SCSI removable disk
[  939.903949] usb 1-1.2: USB disconnect, device number 29
[  940.357576] usb 1-1.2: new high-speed USB device number 30 using ehci_hcd
[  940.548747] usb 1-1.2: New USB device found, idVendor=0bda, idProduct=0159
[  940.548753] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  940.548757] usb 1-1.2: Product: USB2.0-CRW
[  940.548760] usb 1-1.2: Manufacturer: Generic
[  940.548763] usb 1-1.2: SerialNumber: 20071114173400000
[  940.564895] scsi18 : usb-storage 1-1.2:1.0
[  941.563859] scsi 18:0:0:0: Direct-Access     Generic- Multi-Card       1.00 PQ: 0 ANSI: 0 CCS
[  941.565702] sd 18:0:0:0: Attached scsi generic sg2 type 0
[  942.221437] sd 18:0:0:0: [sdb] 3862528 512-byte logical blocks: (1.97 GB/1.84 GiB)
[  942.222225] sd 18:0:0:0: [sdb] Write Protect is off
[  942.222234] sd 18:0:0:0: [sdb] Mode Sense: 03 00 00 00
[  942.223081] sd 18:0:0:0: [sdb] No Caching mode page found
[  942.223090] sd 18:0:0:0: [sdb] Assuming drive cache: write through
[  942.227301] sd 18:0:0:0: [sdb] No Caching mode page found
[  942.227307] sd 18:0:0:0: [sdb] Assuming drive cache: write through
[  942.229878]  sdb:
[  942.232467] sd 18:0:0:0: [sdb] No Caching mode page found
[  942.232478] sd 18:0:0:0: [sdb] Assuming drive cache: write through
[  942.232488] sd 18:0:0:0: [sdb] Attached SCSI removable disk
[  946.465135] ieee80211 phy0: START: tid 1 is not agg'able
[  949.372674] usb 1-1.2: USB disconnect, device number 30
[  949.574100] usb 1-1.2: new high-speed USB device number 31 using ehci_hcd
[  950.061699] usb 1-1.2: device not accepting address 31, error -71
[  950.078446] hub 1-1:1.0: unable to enumerate USB device on port 2
[  950.277818] usb 1-1.2: new high-speed USB device number 33 using ehci_hcd
[  950.306029] hub 1-1:1.0: unable to enumerate USB device on port 2
[  950.593773] usb 1-1.2: new high-speed USB device number 34 using ehci_hcd
[  950.939790] usb 1-1.2: New USB device found, idVendor=0bda, idProduct=0159
[  950.939794] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  950.939797] usb 1-1.2: Product: USB2.0-CRW
[  950.939799] usb 1-1.2: Manufacturer: Generic
[  950.939801] usb 1-1.2: SerialNumber: 20071114173400000
[  950.955354] scsi19 : usb-storage 1-1.2:1.0
[  951.955469] scsi 19:0:0:0: Direct-Access     Generic- Multi-Card       1.00 PQ: 0 ANSI: 0 CCS
[  951.957130] sd 19:0:0:0: Attached scsi generic sg2 type 0
[  952.612802] sd 19:0:0:0: [sdb] 3862528 512-byte logical blocks: (1.97 GB/1.84 GiB)
[  952.613507] sd 19:0:0:0: [sdb] Write Protect is off
[  952.613511] sd 19:0:0:0: [sdb] Mode Sense: 03 00 00 00
[  952.614258] sd 19:0:0:0: [sdb] No Caching mode page found
[  952.614262] sd 19:0:0:0: [sdb] Assuming drive cache: write through
[  952.619391] sd 19:0:0:0: [sdb] No Caching mode page found
[  952.619397] sd 19:0:0:0: [sdb] Assuming drive cache: write through
[  952.621895]  sdb:
[  952.625756] sd 19:0:0:0: [sdb] No Caching mode page found
[  952.625761] sd 19:0:0:0: [sdb] Assuming drive cache: write through
[  952.625765] sd 19:0:0:0: [sdb] Attached SCSI removable disk

Любая помощь?

Иногда, когда он не видит, он пишет такую ​​ошибку в dmesg:

[ 1373.209390] usb 1-1.2: new high-speed USB device number 37 using ehci_hcd
[ 1373.860861] usb 1-1.2: device not accepting address 37, error -71
[ 1373.877631] hub 1-1:1.0: unable to enumerate USB device on port 2