Tag Archives: how-to

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Ubuntu Popping Sound from Speakers

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Are you experiencing an intermittent popping sound from your speakers when nothing is playing? I encountered it after upgrading a PC with an HDA Intel audio controller to Xubuntu 9.10 Karmic Koala. It occurs 10 seconds after a sound stops playing because that’s when the audio chip is turned off to save power.

To prevent the popping noise, you just have to disable the power saving mode.

  1. With your favorite editor, open /etc/modprobe.d/alsa-base.conf as root (Important: Run the editor using sudo or gksudo to give it root permission. You can’t save the file otherwise.)
  2. Locate the line that reads, “# Power down HDA controllers after 10 idle seconds”
  3. Immediately following that comment is the offending option:
    options snd-hda-intel power_save=10 power_save_controller=N
  4. Insert a hash # character at the very beginning of the option line to turn it into a comment. It should look like the following:
    #options snd-hda-intel power_save=10 power_save_controller=N
  5. Save the file and restart Ubuntu

If you have a different sound controller and are experiencing this noise, look in the file for a similar-looking option (e.g., options snd-hda-something power_save…) and comment it out. Share your experience in the comments.

Software

Cygwin 1.7 Has Funny Characters on Man Pages in PuTTY

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Do you see strange characters on man pages in your Cygwin? After upgrading to Cygwin 1.7, I noticed that the soft hyphens in man pages were replaced with the “รข” character. Somehow, the character set wasn’t right. I remember having to deal with this problem several years ago, but couldn’t recall how I solved it. I found some old messages floating around the web going back at least a decade about setting environment variables, locales and whatnot to cure this. Fortunately, the solution turned out to be easy with the latest Cygwin and PuTTY.

As it turns out, Cygwin 1.7 now defaults to using the UTF-8 character set. PuTTY, at least on my system in the US, defaults to ISO-8859-1, a.k.a Latin-1. So, the fix is as follows:

  1. Open the PuTTY Configuration dialog
  2. Under the Window category, click on Translation
  3. In the “Character set translation on received data” section, select UTF-8 in the drop down list box
  4. Save the configuration

Now man pages look normal again. Of course, if you’ve changed the locale and/or character set in your Cygwin to something other than UTF-8, be sure to set PuTTY’s character set to match.

Are you using a different terminal/ssh program with Cygwin than PuTTY and encountering this? Share the corresponding steps to apply the cure for your terminal emulator in the comments.

Software

Pidgin Received Unexpected Response from AIM and ICQ

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Today, my Pidgin IM client started giving the error, “Received unexpected response from http://api.oscar.aol.com/aim/startOSCARSession”, when connecting to the AOL Instant Messenger (AIM) server. Apparently, it can also happen when connecting to ICQ. Fortuantely, the fix/workaround on Windows and Linux is really easy.

  1. Go to Accounts
  2. Modify the AIM or ICQ account
  3. On the Advanced tab, clear the checkbox labeled Use clientLogin
  4. Save

Are you using Adium? It may also have this issue on the Mac. If you’ve solved it, post the steps in a reply.

Update: Alternatively, in step 3, you can clear the checkbox labeled Use SSL

Software

Firefox Fonts Too Big or Small on Kubuntu 9.10

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So you’ve recently installed or upgraded Kubuntu to 9.10 Karmic Koala and installed Firefox. To your horror, you find that all the menus and labels in the browser’s interface are either HUGE or tiny relative to the included KDE applications. Here’s the quick fix.

  1. Click on the K menu
  2. Select System Settings
  3. In the Look & Feel section, click the Appearance icon
  4. In the left panel, click the Fonts icon
  5. At the bottom of the Fonts settings, the Force fonts DPI drop down list control is set to Disabled by default
  6. If you want to make Firefox’s fonts smaller, select 96 DPI; to make them larger, select 120 DPI
  7. Click the Apply button
  8. Restart Firefox

If you’re using Ubuntu with the Gnome desktop and run into this problem, there should be a similar DPI setting for either fonts or the display. Let me know how you resolved it on Gnome.

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Delete Items in Firefox’s Form Auto-Complete History

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There are many articles about completely clearing Firefox’s form auto-complete history. However, I’ve often mistyped something into a form and then either had to live with those typos always showing up or lose my complete form history by clearing it. There is a better way!

Although you can’t easily edit or modify the characters that are stored, you can remove individual items in the form history with just a few keystrokes.

  1. Go to the form that has the field with the auto-complete history entry that you want to delete
  2. Type the first few characters of the value you want to remove. You’ll see the value appear in the drop down list below the form field as usual. In this example, I want to remove the misspelled entry, “knwoledge”.
  3. Use the down-arrow key to highlight the history item to be deleted. Don’t click it with the mouse.
    Select the entry to be removed
  4. Press the Delete (Del) key, instead of Enter, and the item will be gone
    Press the Delete key to remove the item

Yea! No more garbage in your form auto-complete history.

This method is also useful for security and privacy purposes to selectively remove data, such as credit card, Social Security, bank account and other identification numbers, that you don’t want lying around in Firefox’s form history.

Update: From the comments, use Shift+Delete on Mac OS X.