Suramya's Blog : Welcome to my crazy life…

One of the things I liked about KDE3.5 and KDE4 on Ubuntu was that the mouse cursor was this translucent arrow which looked a lot better than the default one on Windows. When I switched to Debian for some reason I didn’t have that theme installed by default. So I tried searching for it but couldn’t find the theme as its kind of hard to search for translucent cursor in kde and get sensible results.

Today I decided to search again and found this forum post about customizing Ubuntu. Over there he mentioned the names of the the cursor themes installed on Ubuntu. Using that as a base I did some more digging/searching and finally found the name of the package I had to install to get my translucent cursor back.

The package you have to install is called ‘xcursor-themes’ and the theme I needed is called ‘whiteglass’. On Debian you can install it by issuing the following command: apt-get install xcursor-themes

Hope this helps.

– Suramya

I have a HP Deskjet F380 All-in-One scanner/printer/copier systems and it is a great machine. I plugged it into my system and started GIMP to scan an image from it. Within about 20 seconds of me powering on the printer I got a popup message in Gimp telling me that my HP printer is ready for use. I printed a test page and it came out fine.

Then I tried to scan an image and I got a message back from SANE that it didn’t find any devices. Checked the system log in /var/log/system and noticed the following error message in the log:

Dec 28 13:36:04 Wyrm python: io/hpmud/musb.c 136: unable get_string_descriptor -1: Operation not permitted
Dec 28 13:36:04 Wyrm python: io/hpmud/musb.c 603: invalid product id string ret=-1

Did a search on the net about the error message and in one of the forums it suggested that I run hp-check to see if I was missing any of the required files. The program gave me a list of missing dependencies that I installed. But the problem still wasn’t solved.

While searching for a solution I found a post on a forum that stated that this person was able to scan an image when running as root but not as a regular user. So I decided to try running xsane as root. When I did that the program ran successfully and detected my scanner. I was also able to scan an image without any issues.

However since its not a good idea to run programs as root, I needed a permanent fix. The same forum gave me a not so elegant but permanent solution to try.

To fix the problem run lsusb and locate the line containing your printer information. On my system the output of the command is:

Bus 002 Device 002: ID 046e:556a Behavior Tech. Computer Corp.
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 009: ID 03f0:5511 Hewlett-Packard DeskJet F300 series
Bus 001 Device 004: ID 0a12:0001 Cambridge Silicon Radio, Ltd Bluetooth Dongle (HCI mode)
Bus 001 Device 003: ID 05e3:0608 Genesys Logic, Inc. USB-2.0 4-Port HUB
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

As you can see the third line gives the the information for my Printer. Now we need to get the vendor and product ID for the printer. The first set of alphanumeric after the ID is the Vendor ID and the numbers after the ‘:’ denote the Product ID. In my case the ‘Vendor ID’ = 03f0 and the ‘Product ID’ = 5511.

Once we have that information we need to create a new file as root at ‘/etc/udev/rules.d/99-custom.rules‘ with the following content:

ATTR{idVendor}==”VendorID”, ATTR{idProduct}==”ProductID”, MODE=”0666″, GROUP=”lp”

where the ProductID and VendorID are the values we got earlier. Once you make the changes, save the file. Then you can disconnect the printer and reconnect it for the new changes to take effect and your scanner will be ready for use.

Another approach which could have worked was to add the user scanning the image to the group ‘lp’ and ‘scanner’ to give them access to the printer. Keep in mind that I haven’t really tried this approach yet

Thanks to Meson at LinuxQuestions.org for the steps to make the printer accessible to all users.

Hope this helps.

– Suramya

As some of you know, linux allows you to have different virtual desktop when using either KDE or Gnome (I haven’t really used any of the other environments). Which is quite useful when you are working on a lot of things and want to reduce the clutter on the screen. I usually separate the windows by task type and then put each task in its own desktop. Makes it easier to work.

In KDE3.5 you could have different background image for each of the virtual desktop which made it easier to identify what desktop you were on currently. In KDE4 that functionality was initially missing for some reason. (Probably because it had to be coded in). Now in KDE4.3 (Maybe 4.2 also. Not sure) this functionality is available again though its not as easy to find as it was in KDE 3.5.

To configure it follow these steps:

Now you will be able choose individual backgrounds for each desktop by Right click on the desktop and clicking on ‘Desktop Settings’ . After that change the background like you usually do. But now this background will only be applied to the current desktop and you can repeat this process on another desktop to choose another background for it.

Thanks to http://userbase.kde.org for the nudge in the right direction.

Hope this helps.

Update (12th Jan 2010): Added one step that I had forgotten to include earlier. Thanks to Sebastian for pointing that out.

Update (19th Sep 2011): These steps no longer work for KDE 4.6.5. New instructions are at: How to set different backgrounds for each desktop in KDE 4.6.5

– Suramya

The default VGA drivers in Debian Testing worked fine for normal use, but when I tried to activate some of the effects like Fade, Shadow, Translucency etc the system told me that it couldn’t do it. I thought that this could be because I have an Nvidia video card and hadn’t installed the Nvidia driver yet.

I tried installing it using synaptic but for some reason when I added the nvidia driver it told me that I would have to remove pretty much most of my xorg (the GUI backend) install. So I aborted it. Did a little search on the web and found the following instructions to install the driver at pendrivelinux.com:

I ran all the commands above but the installer kept telling me that the kernel-headers were missing. Tried a couple of things that didn’t work.

Finally ran NVIDIA-Linux-x86-100.14.23-pkg1.run –help to see what command line parameters are supported by the installer. Noticed that they had a –update parameter that was supposed to update the installer to the latest version. I ran the installer with –update and it downloaded the latest version of the installer. After the download completed it automatically ran the installer which updated my system without any errors.

So if you are trying to install the nvidia drivers using the installer and it keeps complaining about the headers missing even though you have them installed try running it with the –update option.

Now I have all the effects I wanted to enable working fine.

– Suramya