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Old 05-08-2016, 11:57 AM   #1
Hungry ghost
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Some letters missing from Firefox at random times (open SUSE 42.1)


Hi guys,

Since a couple of months ago, when I open Firefox or Thunderbird, some letters are missing from the text displayed on the screen at random times. I am attaching an image so you can know what I mean. It generally goes away after restarting the KDE session and sometimes after closing the web browser and opening it again.

BTW, I am not sure whether this affects the whole GUI or only Firefox/Thunderbird (I have forgotten to open other programs when this happens to check). And something else, this does not happen on Windows, so I guess it's not a hardware issue, but some openSUSE bug.

In case it's necessary, the hardware is a Lenovo G460 laptop. This is the lspci output for my video card:

Code:
00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated Graphics Controller (rev 02)
        Subsystem: Lenovo Device 3920
        Kernel driver in use: i915
        Kernel modules: i915
Any ideas about what might be wrong? Any help would be greatly appreciated!
Attached Thumbnails
Click image for larger version

Name:	snapshot.jpeg
Views:	45
Size:	234.1 KB
ID:	21713  

Last edited by Hungry ghost; 05-08-2016 at 11:59 AM.
 
Old 05-09-2016, 09:54 AM   #2
keefaz
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Look like font rendering issue, did you upgrade cairo, freetype or any font related package recently?
 
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Old 05-09-2016, 11:31 AM   #3
dolphin_oracle
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You might want to look into the version of the i915 driver in use. I've had trouble on my "iron lake" hardware with the default acceleration settings, which leads to strange and unpredictable text issues, but only with certain versions of the driver. The default acceleration method is "sna" (sandy bridge new accerlation). I get corrupted (but not missing) text with 2.99.X version of the driver but everything is good with 2.21.15. also, manually setting the accerlation method to "uxa" also works with the 2.99.X driver.

anyway, might not be your issue, but worth checking out.
 
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Old 05-09-2016, 01:47 PM   #4
Hungry ghost
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Quote:
Originally Posted by keefaz View Post
Look like font rendering issue, did you upgrade cairo, freetype or any font related package recently?
It's possible, but since this started to happen about 3 months ago, I'm not quite sure. BTW, I just checked and I didn't have package freetype installed (libfreetype6 was installed however). I installed it to see if it changes anything.

Quote:
Originally Posted by dolphin_oracle View Post
You might want to look into the version of the i915 driver in use. I've had trouble on my "iron lake" hardware with the default acceleration settings, which leads to strange and unpredictable text issues, but only with certain versions of the driver. The default acceleration method is "sna" (sandy bridge new accerlation). I get corrupted (but not missing) text with 2.99.X version of the driver but everything is good with 2.21.15. also, manually setting the accerlation method to "uxa" also works with the 2.99.X driver.

anyway, might not be your issue, but worth checking out.
Umm, that's interesting; I'm using 2.99.917, so I guess it might be the issue. I'll try creating a xorg.conf file and using "uxa" as you suggest.

Thanks for your help, guys. I'll let you know how it goes, but since it happens randomly and it can go weeks without happening, I'll have to wait a few weeks to know if the problem is solved.
 
Old 05-10-2016, 11:54 AM   #5
erik2282
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I had a similar issue with Iceweasel but it would not go away after restarting so my suggestion may not fix it for you and may be unrelated, but worth a try anyway. In the Firefox settings under Content, under Fonts & Colors, click on Advanced, then tick the box that says "Allow pages to choose their own fonts...". Hit ok and restart Firefox.
 
Old 05-13-2016, 07:21 PM   #6
Hungry ghost
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Thanks for the suggestion; I'll try it when I boot into openSUSE (I have been using Windows during this week for work).

Cheers.
 
Old 05-13-2016, 08:46 PM   #7
alberich
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It would be intersting what happens, if you scale up with Ctrl and +.
 
  


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