Calixte's questions

I installed a snap application (Bookworm) through the software center. The installation process seemed to go fine, but nothing happened when I try to launch it through the GUI. Here's what happens when I use the terminal:

calixte@Ceres:~$ bookworm
[INFO 12:04:45.135623] Application.vala:154: Bookworm version: (null)
[INFO 12:04:45.135687] Application.vala:156: Kernel version: 4.15.0-21-generic
[WARNING 12:04:45.135986] [Gtk] Locale not supported by C library.  Using the fallback 'C' locale.
Failed to register: GDBus.Error:org.freedesktop.DBus.Error.AccessDenied: Connection ":1.165" is not allowed to own the service "com.github.babluboy.bookworm" due to AppArmor policy

What can I do to fix that error and make the app run? Alternatively, can I change the general AppArmor policy?

It's definitely not a hardware issue, as it only started right after the upgrade, but there are no programs detected by the system monitor that use any significant amount of CPU.

Edit: It seems there are two Xorg processes running at the same time, one from my user and another from gdm. The problem solves itself if I kill one or the other... The only hick is that I had to do that everytime I booted.

I switched to lightdm and rebooted. This solved the problem. Now there is only one Xorg process, owned by the user root, which is kind of confusing... Should I report that as a GDM bug?

Qt apps look out of place on my desktop. They use a different theme and color palate to the native GTK apps.

Is there a way to get KDE/Qt5-based apps to integrate better by using the same theme as the GTK apps. If not, how can I set the theme of Qt5 apps on my gnome-based desktop?

Horizontal scrolling on my touchpad was disabled upon upgrading to 17.10 and I can't find a way to re-enable it in the settings.

Two finger (horizontal and vertical) scrolling was the default behavior when I was using 16.10, even after I had switched to the GNOME desktop. However, there seems to be no settings for this both in the settings menu and dconf that I can find.

I updated my laptop (Dell 'XPS 13 Developer Edition', aka 'Sputnik', the one that comes preinstalled with Ubuntu) to 14.10. Upon reboot my trackpad didn't work. Keyboard, touchscreen and everything else works flawlessly. Plugging in a mouse works too. I tried xinput list and this is the result:

user@computer:~$ xinput list
⎡ Virtual core pointer                      id=2    [master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer                id=4    [slave  pointer  (2)]
⎜   ↳ SYNAPTICS Synaptics Large Touch Screen    id=9    [slave  pointer  (2)]
⎜   ↳ Logitech Unifying Device. Wireless PID:200a   id=13   [slave  pointer  (2)]
⎜   ↳ Logitech Unifying Device. Wireless PID:4027   id=14   [slave  pointer  (2)]
⎣ Virtual core keyboard                     id=3    [master keyboard (2)]
    ↳ Virtual core XTEST keyboard               id=5    [slave  keyboard (3)]
    ↳ Power Button                              id=6    [slave  keyboard (3)]
    ↳ Video Bus                                 id=7    [slave  keyboard (3)]
    ↳ Power Button                              id=8    [slave  keyboard (3)]
    ↳ Integrated_Webcam_HD                      id=10   [slave  keyboard (3)]
    ↳ AT Translated Set 2 keyboard              id=11   [slave  keyboard (3)]
    ↳ Dell WMI hotkeys                          id=12   [slave  keyboard (3)]

From what I gather, the touchpad is not detected. Dell says that all their fixes and drivers were all upstreamed from the kernel and I can't find them, nor can I find any way of forcing Ubuntu to recognise the touchpad on the web. What's the next step from here?

I upgraded Ubuntu today and everything works smooth except that Ubuntu doesn't detect any other storage devices. My / and /home partitions work fine, but my other partitions are just not detected. I wouldn't mind, except the same problem goes with USB sticks.

When I plug in a USB stick, the light goes on, but the computer detects nothing. Just to be clear, my mouse and keyboard are connected via USB and work fine.

Any idea how to solve this issue? None of the suggestions I found on the internet have any effect.

I'm trying to edit a table in LibreOffice Writer so that the rows are each their own designated and precise height. I've managed that for the columns by going to Table > Table Properties... then selecting the Columns tab (as pictured below) but I cannot find a similar option for rows. Is there a way of editing row height without dragging the borders (which makes the result invariably imprecise)?

Everything was working perfectly fine on my ubuntu machine since I installed it almost a week ago... until this morning. My computer has been running slow all day, particularly the dash (and I mean really slow). I went to the system settings with the idea of changing my graphics driver to the proprietary one to see it it would fix the problem. Surprise! Ubuntu doesn't detect my graphic card anymore.

I remember there being three options here (at least one proprietary driver and one open source driver). Is there a (safe) way I can force Ubuntu to re-check the hardware without re-installing the whole system?

If it changes anything, the graphics card was from ATI (I don't remember the model, but I could boot my "legacy OS" to check if need be).

Thanks for your help, - Calixte

I've installed Geary from the software center, but I can't launch it from the Dash nor did I manage to create an app icon on the Launcher. The Software center has no problem seeing that the app is installed (see screenshot)

Running the command "geary" will launch the app.

Is there any way I can force the Dash to function properly?

Thanks, Calixte

PS: Does anyone know what this problem is related to? I tried re-installing the app and restarting the computer but that has no effect at all. I have practically installed nothing on this computer, so I can't imagine what app could interfere with the Dash

I replaced a buggy Windows Vista installation with Ubuntu. All works fine except that the main HD where I had all my files are now inaccessible. Here is the error message I get:

Error mounting: mount exited with exit code 13: ntfs_attr_pread_i: ntfs_pread failed: Input/output error
Failed to read NTFS $Bitmap: Input/output error
NTFS is either inconsistent, or there is a hardware fault, or it's a
SoftRAID/FakeRAID hardware. In the first case run chkdsk /f on Windows
then reboot into Windows twice. The usage of the /f parameter is very
important! If the device is a SoftRAID/FakeRAID then first activate
it and mount a different device under the /dev/mapper/ directory, (e.g.
/dev/mapper/nvidia_eahaabcc1). Please see the 'dmraid' documentation
for more details

Is it necessarily a hardware problem? If not, is there a way to repair the HD from Ubuntu?

I recently updated a few machines to 11.10. On one of them, the promt to chose between gdm and lightdm. I tried selecting light dm, but the upgrade tool inevitably returned to the same prompt. I then chose gdm and the upgrade completed.

But now when I tried to boot, the computer presents no login screen. I'm thinking that it's because GDM was uninstalled in the upgrade process.

How can I install lightdm or gdm without logging in traditionally?

PS: apt-get does not seem to work in recovery mode.

I want to start the Recovery mode on an Ubuntu-only machine. The problem is that machine seems to skip grub and boot directly into ubuntu (as it is the only OS installed.

How can I boot into the recovery mode (whether it is through GRUB or not)

I need to retrieve one text-box text on an Ubuntu installation I can't boot anymore (thank you Fedora!) on one specific website.

Where is the form information stored and how can I retrieve it?

A friend of mine has a Packard Bell laptop that came with Windows pre-installed. I installed Ubuntu on it and it works fine, but everytime she tried to boot Windows on it (fortunately rarely) it fails and the computer is unable to boot any OS anymore.

Upon boot, the computer stops on a black screen with a GRUB Rescue prompt.

Is there any way to restore GRUB without re-installing Ubuntu? (preferably an easy way as I cannot do it for her and she is not extremely computer literate)

Also (but less important), is there a way to configure GRUB (or something else) so that Windows won't destroy it on every boot attempt?

Possible Duplicate:
Nvidia driver activated but currently not in use

I've just installed Ubuntu on a new machine and it work perfectly except for the NVidia Graphics driver. When booting from the USB everything worked fine but Ubuntu sent me to the "classic" interface when I booted for the first time.

I installed Unity 2D but it's really not the same thing. Now even when I log on with the Ubuntu interface selected (Unity 3D) Ubuntu logs on with the 2D interface.

I checked the "additional drivers" tool and it tells me that the driver is "activated but not in use"

What can I do to resolve the problem?

Update: here's a screenshot of the "additional drivers" utility

My Toshiba laptop has an nVidia graphics card which is not supported in Ubuntu, and there is no Entry in "Additional Drivers"

I tried installing the driver from the nVidia website (Which does have a Linux 64bit version) but nothing happens zwhen I click the .run file (I have made it executable).

I want to use the classical GNOME categories (Accessories, Education, Games, Office, Sound and Video) in the Dash menu instead of the current Media Apps | Internet Apps | More Apps

I have been unable to use Google Talk with Empathy since I updated to 10.10. I have this problem on three computers, one which is updated and two that were fresh installs (4 months apart, so a different image).

The error I get is:

"Disconected - No reason specified"

How do I boot from USB on a Mac? Mac OS X crashed on that PC and I want to make the owner switch to Ubuntu.

I am trying to create a bootable USB stick from a .iso image (it isn't a linux distro or anything of the sort) intended for use with a CD. I've tried UNetbootin and dd but they don't boot.