[Discuss] external drive not showing such as sdcard

[david at thekramers.net (David Kramer)]

I would try "sudo fdisk -l /dev/sdb"

If it does not show any suitable filesystems, then that's the problem 
and not any file permissions.

On 7/9/21 3:02 PM, Eric Chadbourne wrote:
> On my HP Envy laptop running Ubuntu 20.04.2 LTS, the Files application 
> doesn't show USB or sdcards.
>
> I can see USB in terminal in /dev.? However I can't see the sdcard.
>
> ????eric at dragonEnvy:/media/eric$ ls -la /dev/sd*
> ????brw-rw---- 1 root disk 8,? 0 Jul? 9 12:54 /dev/sda
> ????brw-rw---- 1 root disk 8,? 1 Jul? 9 12:54 /dev/sda1
> ????brw-rw---- 1 root disk 8,? 2 Jul? 9 12:54 /dev/sda2
> ????brw-rw---- 1 root disk 8,? 3 Jul? 9 12:54 /dev/sda3
> ????brw-rw---- 1 root disk 8, 16 Jul? 9 13:19 /dev/sdb? // the USB dongle
>
> Is the sdcard card reader recognized?? I _think_ yes.
>
> ????sudo lspci -v -nn
>
> ????02:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. 
> RTS522A PCI Express Card Reader [10ec:522a] (rev 01)
> ??????? Subsystem: Hewlett-Packard Company RTS522A PCI Express Card 
> Reader [103c:81ad]
> ??????? Flags: bus master, fast devsel, latency 0, IRQ 125
> ??????? Memory at b1000000 (32-bit, non-prefetchable) [size=4K]
> ??????? Capabilities: [40] Power Management version 3
> ??????? Capabilities: [50] MSI: Enable+ Count=1/1 Maskable- 64bit+
> ??????? Capabilities: [70] Express Endpoint, MSI 00
> ??????? Capabilities: [100] Advanced Error Reporting
> ??????? Capabilities: [140] Device Serial Number 00-00-00-01-00-4c-e0-00
> ??????? Capabilities: [150] Latency Tolerance Reporting
> ??????? Capabilities: [158] L1 PM Substates
> ??????? Kernel driver in use: rtsx_pci
> ??????? Kernel modules: rtsx_pci
>
> I tried a rescan but no help.
>
> ????echo 1 | sudo tee /sys/bus/pci/rescan
>
> Shouldn't the drives be shown in /media?
>
> ????eric at dragonEnvy:/media/eric$ ls -lah /media
> ????total 12K
> ????drwxr-xr-x?? 3 root root 4.0K Apr 25? 2020 .
> ????drwxr-xr-x? 24 root root 4.0K Apr? 7? 2020 ..
> ????drwxr-x---+? 2 root root 4.0K Jun? 8 16:28 eric
>
> ????eric at dragonEnvy:/media/eric$ ls -lah /media/eric
> ????total 8.0K
> ????drwxr-x---+ 2 root root 4.0K Jun? 8 16:28 .
> ????drwxr-xr-x? 3 root root 4.0K Apr 25? 2020 ..
>
> I see a little plus sign.? Maybe I changed something here a while back 
> and forgot.? Maybe this is an acl or permission issue?? So now I'm 
> thinking maybe just leave the USB and sdcard in and reboot.? Maybe 
> root will set them up on initialization.? Didn't work.
>
> Interesting errors on reboot in auth.log but after investigation I 
> think it is cruft from pam that can be ignored.
>
> ????Jul? 9 13:41:09 dragonEnvy gdm-password]: 
> pam_unix(gdm-password:auth): Couldn't open /etc/securetty: No such 
> file or directory
> ????Jul? 9 13:41:16 dragonEnvy gdm-password]: 
> pam_unix(gdm-password:auth): Couldn't open /etc/securetty: No such 
> file or directory
> ????Jul? 9 13:41:16 dragonEnvy gdm-password]: gkr-pam: unable to 
> locate daemon control file
> ????Jul? 9 13:41:16 dragonEnvy gdm-password]: gkr-pam: stashed 
> password to try later in open session
>
> Let's check media directory permissions.
>
> ????eric at dragonEnvy:/media$ getfacl eric
> ????# file: eric
> ????# owner: root
> ????# group: root
> ????user::rwx
> ????user:eric:r-x
> ????group::---
> ????mask::r-x
> ????other::---
>
> Oddly I can plug in a mouse or my iPad and everything works fine. I 
> plug in an USB dongle or my little SandDisk card and nothing. What do 
> you think?? Where else to look?
>
> Thanks for any tips!
>
> Eric C
>
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