[Discuss] external drive not showing such as sdcard

[Eric Chadbourne]

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