Libra Working Around Kobo Libra H2O Mounting as Root When Hotplugged

ceridwen · 06-01-2021, 12:06 AM

Some versions ago, the way Gnome/Linux loads hotplugged USB devices changed so the drives are owned by root when they're mounted automatically. The problem with this is that I can't copy files to my Kobo without doing so as root. As I typically use Calibre to do this, I have to run Calibre as root so it has the ability to write to the Kobo (mounted as a USB device) to copy my many side-loaded books. (I confirmed that this works with Calibre when it's running as root, just to be sure this is the problem.) I could probably hard-code the UUID in fstab/ or some such as a dirty hack to fix it, but that's not portable (I'd have to recreate it in every copy of fstab across multiple devices) and would be annoying to set up in the first place.

Is there any way to make a hotplugged Kobo load as my user (or some specific user) or at least with the files have r/w global permissions so that I could copy files while running Calibre as my user?

I'm running Ubuntu 20.04 with Gnome 3.30+2.

Cootey · 06-01-2021, 01:46 AM

Have you tried creating a mount point for it, then setting your user as owner? I’m mostly a Unix/Darwin user, but I was just dealing with a similar issue yesterday on my rPi and found the first part of this page helpful:

Code:

 sudo mkdir /mnt/kobo
sudo chown -R pi:pi /mnt/kobo
sudo chmod -R 775 /mnt/kobo
sudo setfacl -Rdm g:pi:rwx /mnt/kobo
sudo setfacl -Rm g:pi:rwx /mnt/kobo

https://www.htpcguides.com/properly-...-raspberry-pi/

Obviously, call the mount point whatever you want.

Sent from my iPhone using Tapatalk Pro

davidfor · 06-01-2021, 02:55 AM

Quote:

Originally Posted by ceridwen

Some versions ago, the way Gnome/Linux loads hotplugged USB devices changed so the drives are owned by root when they're mounted automatically. The problem with this is that I can't copy files to my Kobo without doing so as root. As I typically use Calibre to do this, I have to run Calibre as root so it has the ability to write to the Kobo (mounted as a USB device) to copy my many side-loaded books. (I confirmed that this works with Calibre when it's running as root, just to be sure this is the problem.) I could probably hard-code the UUID in fstab/ or some such as a dirty hack to fix it, but that's not portable (I'd have to recreate it in every copy of fstab across multiple devices) and would be annoying to set up in the first place.

Is there any way to make a hotplugged Kobo load as my user (or some specific user) or at least with the files have r/w global permissions so that I could copy files while running Calibre as my user?

I'm running Ubuntu 20.04 with Gnome 3.30+2.

I don't think this is something the device has control of. All it is doing is presenting itself as a USB MSD and letting the computer decide what to do. If a Linux box does the mount as owned by root, then that need to be sorted out on that box. I don't see a problem on my work Ubuntu 20.04 machine. I don't remember having to do anything when I first set it up to use calibre and my Kobo devices.

Quoth · 06-01-2021, 08:19 AM

I don't see ANY problem with Kobo, Kindle, Nook, Sony etc on Linux Mint 20.1 (which is similar). No need to be root or use sudo. I've never had to change anything.

There is an issue with SOME MTP devices that can't be re-enabled when unmounted from the file manager. Stopping the "gvfs-mtp-volume-monitor" process before plugging in an MTP device solves that.

But the Libra uses USB Mass Storage mode. I've had no problem on 18.3 (32 or 64 bit) or 20.1 (that's 64 bit only)

NiLuJe · 06-01-2021, 01:07 PM

Definitely your disto being crazypants, the device has nothing to do with that.

You'll have to find another poor sap suffering through Ubuntu (and/or Gnome, I wouldn't put it past its VFS thingy to try to do something stupid with an USBMS drive) for help

.

Quoth · 06-02-2021, 07:59 AM

I always install more than one user and more than one desktop (usually Cinnamon and Mate) so I can compare or easily recover. Though you CAN do Ctrl-Alt-F1 and install a desktop from a console!

Something has got messed up. Ubuntu + Gnome (3?) doesn't need USB MS user to be root. Try creating a new user and then a different desktop if a new user doesn't work. I used to use Ubuntu for years after Red Hat and then switched to Mint + Mate when Canonical drank Mobile-Win8 kool-aid (or antifreeze) and had "Unity".

One nice feature of most Linux is Themes and Desktops. Win10 is now less configurable than Win 3.x, Win9x, Win8, XP, Vista etc. I had one laptop, a notebook, with SIX choices of desktop at logon time to see which suited the miniscule screen best. Setting font dpi to 65 helps with low screens.

ceridwen · 06-04-2021, 08:15 PM

Quote:

Originally Posted by davidfor

If a Linux box does the mount as owned by root, then that need to be sorted out on that box. I don't see a problem on my work Ubuntu 20.04 machine. I don't remember having to do anything when I first set it up to use calibre and my Kobo devices.

This definitely needs to be fixed from the Linux side, yeah.

If you have a Kobo that automatically mounts with r/w permissions for your user, could you tell me where it's being mounted and what the user+group permissions are on the mount point when it is and isn't mounted? If you know what's responsible for mounting it, that would also tell me something. I'm wondering if this is a Gnome-specific problem or bug.

davidfor · 06-04-2021, 08:40 PM

Quote:

Originally Posted by ceridwen

This definitely needs to be fixed from the Linux side, yeah.

If you have a Kobo that automatically mounts with r/w permissions for your user, could you tell me where it's being mounted and what the user+group permissions are on the mount point when it is and isn't mounted? If you know what's responsible for mounting it, that would also tell me something. I'm wondering if this is a Gnome-specific problem or bug.

Honestly, I've never paid attention. I occasionally plug it in to test something. It's my work machine, so I'll try and remember to look it when I'm next in the office. But, I don't remember doing anything special. Just connected it and started calibre.

NiLuJe · 06-05-2021, 11:41 AM

The standard-ish path ought to be something like /run/media/$USER/$Volume_Name, all handled dynamically via udev + udisks (meaning the mountpoint doesn't actually exist until it's needed).

davidfor · 06-08-2021, 03:18 AM

Quote:

Originally Posted by NiLuJe

The standard-ish path ought to be something like /run/media/$USER/$Volume_Name, all handled dynamically via udev + udisks (meaning the mountpoint doesn't actually exist until it's needed).

Just remember to check this. Mine is mounted as /media/$USER/KOBOeReader. I am sure it has been like this since I first setup this machine. That would have been under Ubuntu 18.04 or 18.10 and it has since updated to 20.04. I don't remember doing anything except plugging the ereader.

geek1011 · 06-08-2021, 06:52 AM

Quote:

Originally Posted by davidfor

Just remember to check this. Mine is mounted as /media/$USER/KOBOeReader. I am sure it has been like this since I first setup this machine. That would have been under Ubuntu 18.04 or 18.10 and it has since updated to 20.04. I don't remember doing anything except plugging the ereader.

And on non-Debian distros, it'll be /run/media/$USER/KOBOeReader.

Did you change the mount options in gnome-disk-utility, or add a line to /etc/fstab (or a systemd mount unit) for it? If so, ensure you didn't enable the auth option for it.

If that isn't the problem and you use one of the common DEs, then post the relevant lines from the udisks log.

Also, ensure you don't have something external auto-mounting stuff as another user.

ceridwen · 06-12-2021, 04:40 AM

My Kobo also mounts at /media/$USER/KOBOeReader, and the mount point doesn't exist before it's created. The problem is clearly the ownership of the created mountpoint:

drwxr-xr-x 16 root root 4.0K Dec 31 1969 KOBOeReader

There's no /etc/fstab entry for this mountpoint, and I haven't futzed with the systemd mount unit (and I don't recall seeing a script having futzed with it either). I also don't think I've done anything with gnome-disk-utility, though I'm less sure about that.

The relevant bits from syslog where it's mounting my ereader:

Code:

Jun 12 01:19:04 hostname kernel: [2453801.783537] usb 3-1: new high-speed USB device number 4 using xhci_hcd
Jun 12 01:19:04 hostname kernel: [2453801.937323] usb 3-1: New USB device found, idVendor=2237, idProduct=4232, bcdDevice= 4.01
Jun 12 01:19:04 hostname kernel: [2453801.937327] usb 3-1: New USB device strings: Mfr=3, Product=4, SerialNumber=5
Jun 12 01:19:04 hostname kernel: [2453801.937329] usb 3-1: Product: eReader-4.26.16704
Jun 12 01:19:04 hostname kernel: [2453801.937330] usb 3-1: Manufacturer: Kobo
Jun 12 01:19:04 hostname kernel: [2453801.937332] usb 3-1: SerialNumber: N87309W070170
Jun 12 01:19:04 hostname kernel: [2453801.938239] usb-storage 3-1:1.0: USB Mass Storage device detected
Jun 12 01:19:04 hostname kernel: [2453801.938391] scsi host6: usb-storage 3-1:1.0
Jun 12 01:19:04 hostname mtp-probe: checking bus 3, device 4: "/sys/devices/pci0000:00/0000:00:14.0/usb3/3-1"
Jun 12 01:19:04 hostname mtp-probe: bus: 3, device: 4 was not an MTP device
Jun 12 01:19:05 hostname mtp-probe: checking bus 3, device 4: "/sys/devices/pci0000:00/0000:00:14.0/usb3/3-1"
Jun 12 01:19:05 hostname mtp-probe: bus: 3, device: 4 was not an MTP device
Jun 12 01:19:05 hostname kernel: [2453802.959905] scsi 6:0:0:0: Direct-Access     Linux    File-Stor Gadget 0401 PQ: 0 ANSI: 2
Jun 12 01:19:05 hostname kernel: [2453802.960158] sd 6:0:0:0: Attached scsi generic sg1 type 0
Jun 12 01:19:05 hostname kernel: [2453802.964497] sd 6:0:0:0: Power-on or device reset occurred
Jun 12 01:19:05 hostname kernel: [2453802.964879] sd 6:0:0:0: [sdb] 14139389 512-byte logical blocks: (7.24 GB/6.74 GiB)
Jun 12 01:19:05 hostname kernel: [2453802.965153] sd 6:0:0:0: [sdb] Write Protect is off
Jun 12 01:19:05 hostname kernel: [2453802.965155] sd 6:0:0:0: [sdb] Mode Sense: 0f 00 00 00
Jun 12 01:19:05 hostname kernel: [2453802.965396] sd 6:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
Jun 12 01:19:05 hostname kernel: [2453802.989366]  sdb:
Jun 12 01:19:05 hostname kernel: [2453803.000125] sd 6:0:0:0: [sdb] Attached SCSI removable disk
Jun 12 01:19:06 hostname usbmount[1093713]: executing command: mount -tvfat -osync,noexec,nodev,noatime,nodiratime /dev/sdb /media/usb0
Jun 12 01:19:06 hostname kernel: [2453803.954561] FAT-fs (sdb): Volume was not properly unmounted. Some data may be corrupt. Please run fsck.
Jun 12 01:19:06 hostname usbmount[1093713]: executing command: run-parts /etc/usbmount/mount.d
Jun 12 01:19:06 hostname dbus-daemon[1279]: [system] Activating via systemd: service name='org.freedesktop.hostname1' unit='dbus-org.freedesktop.hostname1.service' requested by ':1.84' (uid=1000 pid=3458 comm="/usr/bin/gnome-shell " label="unconfined")
Jun 12 01:19:06 hostname systemd[1]: Starting Hostname Service...
Jun 12 01:19:06 hostname systemd[1]: Finished Clean the /media/user/KOBOeReader mount point.
Jun 12 01:19:06 hostname udisksd[1329]: Mounted /dev/sdb at /media/user/KOBOeReader on behalf of uid 1000

geek1011 · 06-12-2021, 12:19 PM

The ownership shouldn't be an issue, since on Debian-based systems, ACLs are used by default on /media.

Check the output of `findmnt --target /media`. If it has `noacl`, remove that option from `/etc/fstab`.

Check the output of `sudo dumpe2fs -h $(findmnt -no SOURCE --target /media) | grep "Default mount options:"` If it doesn't have `acl`, run `sudo tune2fs -o acl $(findmnt -no SOURCE --target /media)`.

If you made any changes in these steps, reboot.

Check the output of `ls -lah /media/*`. If there is not a plus sign beside the `.` entry for your user, ensure the `acl` package is installed, then run `sudo setfacl -m u:$USER:rx /media/$USER`.

rashkae · 06-12-2021, 06:22 PM

Looks like you have the "usbmount" package installed,,, try removing it. (If removing usbmount isn't a good option for you due to dependancies, try installing the 'pmount' package.)

Mounting removable drive these days is generally done by the desktop environment file browser, and does not require the external usbmount.

ceridwen · 06-13-2021, 04:56 AM

This is getting more puzzling.

I checked that noacl was not set in /etc/fstab, it is not.

dumpe2fs looks right:

Code:

dumpe2fs 1.45.5 (07-Jan-2020)
Default mount options:    user_xattr acl

The output of ls -lah also looks right:

Code:

/media/user:
total 8.0K
drwxrwx---+  2 root root 4.0K Jun 12 20:50 .
drwxr-xr-x  11 root root 4.0K Dec  5  2020 ..

I spent a little bit of time looking into acl debugging, but they suggested the same steps you did. I'm going to look into it more tomorrow.

06-01-2021, 12:06 AM	#1
ceridwen Enthusiast Posts: 36 Karma: 10 Join Date: Feb 2017 Device: Kobo Aura H2O	Working Around Kobo Libra H2O Mounting as Root When Hotplugged Some versions ago, the way Gnome/Linux loads hotplugged USB devices changed so the drives are owned by root when they're mounted automatically. The problem with this is that I can't copy files to my Kobo without doing so as root. As I typically use Calibre to do this, I have to run Calibre as root so it has the ability to write to the Kobo (mounted as a USB device) to copy my many side-loaded books. (I confirmed that this works with Calibre when it's running as root, just to be sure this is the problem.) I could probably hard-code the UUID in fstab/ or some such as a dirty hack to fix it, but that's not portable (I'd have to recreate it in every copy of fstab across multiple devices) and would be annoying to set up in the first place. Is there any way to make a hotplugged Kobo load as my user (or some specific user) or at least with the files have r/w global permissions so that I could copy files while running Calibre as my user? I'm running Ubuntu 20.04 with Gnome 3.30+2.

06-01-2021, 01:46 AM	#2
Cootey Absentminded Reader Posts: 1,232 Karma: 6467285 Join Date: Apr 2017 Device: Kobo Mini, Clara HD, Elipsa; Kindle Paperwhite 3 & 4; iOS eReader apps	Working Around Kobo Libra H2O Mounting as Root When Hotplugged Have you tried creating a mount point for it, then setting your user as owner? I’m mostly a Unix/Darwin user, but I was just dealing with a similar issue yesterday on my rPi and found the first part of this page helpful: Code: sudo mkdir /mnt/kobo sudo chown -R pi:pi /mnt/kobo sudo chmod -R 775 /mnt/kobo sudo setfacl -Rdm g:pi:rwx /mnt/kobo sudo setfacl -Rm g:pi:rwx /mnt/kobo https://www.htpcguides.com/properly-...-raspberry-pi/ Obviously, call the mount point whatever you want. Sent from my iPhone using Tapatalk Pro

06-02-2021, 07:59 AM	#6
Quoth the rook, bossing Never. Posts: 12,038 Karma: 88064427 Join Date: Jun 2017 Location: Ireland Device: All 4 Kinds: epub eink, Kindle, android eink, NxtPaper11	I always install more than one user and more than one desktop (usually Cinnamon and Mate) so I can compare or easily recover. Though you CAN do Ctrl-Alt-F1 and install a desktop from a console! Something has got messed up. Ubuntu + Gnome (3?) doesn't need USB MS user to be root. Try creating a new user and then a different desktop if a new user doesn't work. I used to use Ubuntu for years after Red Hat and then switched to Mint + Mate when Canonical drank Mobile-Win8 kool-aid (or antifreeze) and had "Unity". One nice feature of most Linux is Themes and Desktops. Win10 is now less configurable than Win 3.x, Win9x, Win8, XP, Vista etc. I had one laptop, a notebook, with SIX choices of desktop at logon time to see which suited the miniscule screen best. Setting font dpi to 65 helps with low screens. Last edited by Quoth; 06-02-2021 at 08:04 AM. Reason: desktop options.

06-13-2021, 04:56 AM	#15
ceridwen Enthusiast Posts: 36 Karma: 10 Join Date: Feb 2017 Device: Kobo Aura H2O	This is getting more puzzling. I checked that noacl was not set in /etc/fstab, it is not. dumpe2fs looks right: Code: dumpe2fs 1.45.5 (07-Jan-2020) Default mount options: user_xattr acl The output of ls -lah also looks right: Code: /media/user: total 8.0K drwxrwx---+ 2 root root 4.0K Jun 12 20:50 . drwxr-xr-x 11 root root 4.0K Dec 5 2020 .. I spent a little bit of time looking into acl debugging, but they suggested the same steps you did. I'm going to look into it more tomorrow.

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06-01-2021, 08:19 AM	#4
Quoth the rook, bossing Never. Posts: 12,038 Karma: 88064427 Join Date: Jun 2017 Location: Ireland Device: All 4 Kinds: epub eink, Kindle, android eink, NxtPaper11	I don't see ANY problem with Kobo, Kindle, Nook, Sony etc on Linux Mint 20.1 (which is similar). No need to be root or use sudo. I've never had to change anything. There is an issue with SOME MTP devices that can't be re-enabled when unmounted from the file manager. Stopping the "gvfs-mtp-volume-monitor" process before plugging in an MTP device solves that. But the Libra uses USB Mass Storage mode. I've had no problem on 18.3 (32 or 64 bit) or 20.1 (that's 64 bit only)

06-01-2021, 01:07 PM	#5
NiLuJe BLAM! Posts: 13,491 Karma: 26012494 Join Date: Jun 2010 Location: Paris, France Device: Kindle 2i, 3g, 4, 5w, PW, PW2, PW5; Kobo H2O, Forma, Elipsa, Sage, C2E	Definitely your disto being crazypants, the device has nothing to do with that. You'll have to find another poor sap suffering through Ubuntu (and/or Gnome, I wouldn't put it past its VFS thingy to try to do something stupid with an USBMS drive) for help .

06-05-2021, 11:41 AM	#9
NiLuJe BLAM! Posts: 13,491 Karma: 26012494 Join Date: Jun 2010 Location: Paris, France Device: Kindle 2i, 3g, 4, 5w, PW, PW2, PW5; Kobo H2O, Forma, Elipsa, Sage, C2E	The standard-ish path ought to be something like /run/media/$USER/$Volume_Name, all handled dynamically via udev + udisks (meaning the mountpoint doesn't actually exist until it's needed).

06-12-2021, 12:19 PM	#13
geek1011 Wizard Posts: 2,784 Karma: 6990707 Join Date: May 2016 Location: Ontario, Canada Device: Kobo Mini, Aura Edition 2 v1, Clara HD	The ownership shouldn't be an issue, since on Debian-based systems, ACLs are used by default on /media. Check the output of `findmnt --target /media`. If it has `noacl`, remove that option from `/etc/fstab`. Check the output of `sudo dumpe2fs -h $(findmnt -no SOURCE --target /media) \| grep "Default mount options:"` If it doesn't have `acl`, run `sudo tune2fs -o acl $(findmnt -no SOURCE --target /media)`. If you made any changes in these steps, reboot. Check the output of `ls -lah /media/*`. If there is not a plus sign beside the `.` entry for your user, ensure the `acl` package is installed, then run `sudo setfacl -m u:$USER:rx /media/$USER`.

06-12-2021, 06:22 PM	#14
rashkae Wizard Posts: 1,204 Karma: 5372239 Join Date: Jun 2011 Location: Ontario, Canada Device: Kobo Aura HD	Looks like you have the "usbmount" package installed,,, try removing it. (If removing usbmount isn't a good option for you due to dependancies, try installing the 'pmount' package.) Mounting removable drive these days is generally done by the desktop environment file browser, and does not require the external usbmount.

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