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I'm currently using Kubuntu 12.04 and after installing nVidia drivers and Setting resolution up to 1440x900 limit, fonts look ugly,only browser content fonts work well, I tried fixing them using Fonts-KDE contol Module, but it didn't work, Please help here is a screenshot enter image description here

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up vote 7 down vote accepted
  1. Open KDE Settings Manager

  2. Then go to Application Appearence

  3. Select Fonts section

  4. change the Use anti-alialising option to Enabled

  5. Then click Configure button.

  6. In the new window, select Use subpixel-rendering and change the value to RGB

  7. Change the hinting style to Slight.

  8. Then remove the file .fonts.conf in your home folder. It is a hidden file. To see, that file in Kubuntu, Press Alt + . .

    Here is a screenshot of the settings window

    enter image description here

  9. Logout and Login again.

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That helped, but Helvetica and Roboto (default fonts in G+ and Facebook) still look like a dog's breakfast. – Paul Tomblin May 25 '14 at 19:03
Oh never mind, I had the "Exclude Range" checked. Unchecking that fixed everything! – Paul Tomblin May 25 '14 at 19:06
Holy crap did that ever improve things. – Swoogan Sep 12 '14 at 2:06

In your home folder, rename .fonts.conf to .fonts.conf.bak then log out. Log back in and the fonts in Firefox are good to go.

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