21.10 sometimes ignoring USB memory sticks - and a possible workaround.

Fri Oct 22 12:30:46 UTC 2021

Hi Colin,

More observations from today:-
Using a SanDisk Cruzer Blade (called HERMES) USB flash drive.
If the drive does not automount (is that the right word?), start Nautilus
(file manager) and click on HERMES to mount the flash drive.

Sods law - when I tried it today, the first time, it worked.

Here is when it worked:-
did-automount-info.txt
======================
Oct 22 12:33:31 descartes systemd[1]: systemd-localed.service: Deactivated
successfully.
Oct 22 12:33:31 descartes systemd[1]: systemd-hostnamed.service:
Deactivated successfully.
Oct 22 12:33:35 descartes kernel: usb 2-2: new high-speed USB device number
4 using ehci-pci
Oct 22 12:33:35 descartes kernel: usb 2-2: New USB device found,
idVendor=0781, idProduct=5567, bcdDevice= 1.00
Oct 22 12:33:35 descartes kernel: usb 2-2: New USB device strings: Mfr=1,
Product=2, SerialNumber=3
Oct 22 12:33:35 descartes kernel: usb 2-2: Product: Cruzer Blade
Oct 22 12:33:35 descartes kernel: usb 2-2: Manufacturer: SanDisk
Oct 22 12:33:35 descartes kernel: usb 2-2: SerialNumber:
4C530000220228211085
Oct 22 12:33:36 descartes mtp-probe[2245]: checking bus 2, device 4:
"/sys/devices/pci0000:00/0000:00:1d.7/usb2/2-2"
Oct 22 12:33:36 descartes mtp-probe[2245]: bus: 2, device: 4 was not an MTP
device
Oct 22 12:33:36 descartes kernel: usb-storage 2-2:1.0: USB Mass Storage
device detected
Oct 22 12:33:36 descartes kernel: scsi host5: usb-storage 2-2:1.0
Oct 22 12:33:36 descartes kernel: usbcore: registered new interface driver
usb-storage
Oct 22 12:33:36 descartes kernel: usbcore: registered new interface driver
uas
Oct 22 12:33:36 descartes mtp-probe[2260]: checking bus 2, device 4:
"/sys/devices/pci0000:00/0000:00:1d.7/usb2/2-2"
Oct 22 12:33:36 descartes mtp-probe[2260]: bus: 2, device: 4 was not an MTP
device
Oct 22 12:33:37 descartes kernel: scsi 5:0:0:0: Direct-Access     SanDisk
 Cruzer Blade     1.00 PQ: 0 ANSI: 6
Oct 22 12:33:37 descartes kernel: sd 5:0:0:0: Attached scsi generic sg2
type 0
Oct 22 12:33:37 descartes kernel: sd 5:0:0:0: [sdb] 30031872 512-byte
logical blocks: (15.4 GB/14.3 GiB)
Oct 22 12:33:37 descartes kernel: sd 5:0:0:0: [sdb] Write Protect is off
Oct 22 12:33:37 descartes kernel: sd 5:0:0:0: [sdb] Mode Sense: 43 00 00 00
Oct 22 12:33:37 descartes kernel: sd 5:0:0:0: [sdb] Write cache: disabled,
read cache: enabled, doesn't support DPO or FUA
Oct 22 12:33:37 descartes kernel:  sdb: sdb1
Oct 22 12:33:37 descartes kernel: sd 5:0:0:0: [sdb] Attached SCSI removable
disk
Oct 22 12:33:38 descartes udisksd[656]: Mounted /dev/sdb1 at
/media/rene/HERMES on behalf of uid 1000
Oct 22 12:33:38 descartes dbus-daemon[1324]: [session uid=1000 pid=1324]
Activating service name='org.gnome.Shell.HotplugSniffer' reque

And here is when it didn't work:-

did-not-automount-usb.txt
=========================
[  140.745096] scsi host5: usb-storage 2-2:1.0
[  140.745314] usbcore: registered new interface driver usb-storage
[  140.791035] usbcore: registered new interface driver uas
[  141.755827] scsi 5:0:0:0: Direct-Access     SanDisk  Cruzer Blade
1.00 PQ: 0 ANSI: 6
[  141.770926] sd 5:0:0:0: Attached scsi generic sg2 type 0
[  141.773801] sd 5:0:0:0: [sdb] 30031872 512-byte logical blocks: (15.4
GB/14.3 GiB)
[  141.775683] sd 5:0:0:0: [sdb] Write Protect is off
[  141.775690] sd 5:0:0:0: [sdb] Mode Sense: 43 00 00 00
[  141.776672] sd 5:0:0:0: [sdb] Write cache: disabled, read cache:
enabled, doesn't support DPO or FUA
[  141.814372]  sdb: sdb1
[  141.841437] sd 5:0:0:0: [sdb] Attached SCSI removable disk
[  963.815395] perf: interrupt took too long (2503 > 2500), lowering
kernel.perf_event_max_sample_rate to 79750
[ 1243.127350] usb 2-2: USB disconnect, device number 4
[ 1263.606740] usb 2-2: new high-speed USB device number 5 using ehci-pci
[ 1263.763608] usb 2-2: New USB device found, idVendor=0781,
idProduct=5567, bcdDevice= 1.00
[ 1263.763623] usb 2-2: New USB device strings: Mfr=1, Product=2,
SerialNumber=3
[ 1263.763630] usb 2-2: Product: Cruzer Blade
[ 1263.763635] usb 2-2: Manufacturer: SanDisk
[ 1263.763640] usb 2-2: SerialNumber: 4C530000220228211085
[ 1263.764080] usb-storage 2-2:1.0: USB Mass Storage device detected
[ 1263.764406] scsi host5: usb-storage 2-2:1.0
[ 1264.795827] scsi 5:0:0:0: Direct-Access     SanDisk  Cruzer Blade
1.00 PQ: 0 ANSI: 6
[ 1264.803073] sd 5:0:0:0: Attached scsi generic sg2 type 0
[ 1264.810397] sd 5:0:0:0: [sdb] 30031872 512-byte logical blocks: (15.4
GB/14.3 GiB)
[ 1264.812270] sd 5:0:0:0: [sdb] Write Protect is off
[ 1264.812278] sd 5:0:0:0: [sdb] Mode Sense: 43 00 00 00
[ 1264.813266] sd 5:0:0:0: [sdb] Write cache: disabled, read cache:
enabled, doesn't support DPO or FUA
[ 1264.854712]  sdb: sdb1
[ 1264.882016] sd 5:0:0:0: [sdb] Attached SCSI removable disk
[ 1284.796101] perf: interrupt took too long (3146 > 3128), lowering
kernel.perf_event_max_sample_rate to 63500

As you can see, in the second log entry, there is no message about mounting
the USB flash drive.

HTH,

Ian

-- 
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