Re: [gentoo-user] Problem with xf86-video-ati nvidia-drivers

2011-07-20 Thread Stroller

On 19 July 2011, at 20:41, Grant wrote:
 ...
 I found this:
 
 We recommend using the Just Scan mode with 1080i and 1080p material,
 which assures zero overscan and proper 1:1 pixel matching for this
 1080p display.
 
 http://reviews.cnet.com/flat-panel-tvs/lg-47lh90/4505-6482_7-33485570.html#reviewPage1
 
 Just Scan is what I've always used which has the ghosting problem.  I
 think I'm back to square one.

I think the Windows versions of the nVidia drivers have options to over- or 
under-scan.

This compensates for (older?) TVs which have no way to switch to a just scan 
mode. So the graphics card will, I think, output a slightly over-sized picture, 
then the telly will scale it down a bit back to normal size. This will not 
produce a perfect picture, but if overscan on the TV cannot be disabled, then 
there is no better choice.

Is it possible they have recently added this feature to the Linux nVidia driver?

Stroller.




Re: [gentoo-user] Problem with xf86-video-ati nvidia-drivers

2011-07-20 Thread Michael Mol
On Wed, Jul 20, 2011 at 10:29 AM, Stroller
strol...@stellar.eclipse.co.uk wrote:

 On 19 July 2011, at 20:41, Grant wrote:
 ...
 I found this:

 We recommend using the Just Scan mode with 1080i and 1080p material,
 which assures zero overscan and proper 1:1 pixel matching for this
 1080p display.

 http://reviews.cnet.com/flat-panel-tvs/lg-47lh90/4505-6482_7-33485570.html#reviewPage1

 Just Scan is what I've always used which has the ghosting problem.  I
 think I'm back to square one.

 I think the Windows versions of the nVidia drivers have options to over- or 
 under-scan.

 This compensates for (older?) TVs which have no way to switch to a just 
 scan mode. So the graphics card will, I think, output a slightly over-sized 
 picture, then the telly will scale it down a bit back to normal size. This 
 will not produce a perfect picture, but if overscan on the TV cannot be 
 disabled, then there is no better choice.

 Is it possible they have recently added this feature to the Linux nVidia 
 driver?

Possibly related observation: On my 720p TV, if I output (via HDMI)
720p to it, I lose the outer ten or so pixels off of each side of the
screen. NVidia video card configuration tool indicated a higher
resolution was available, 13??x???, which resulted in a fine picture
with no missing pixels, once I switched to it. This was about a year
ago. (Can't easily test, now, because I no longer have a PC hooked up
to that TV)

-- 
:wq



Re: [gentoo-user] Problem with xf86-video-ati nvidia-drivers

2011-07-20 Thread Grant
  --snip--
 
  The TV is an LG 47LH90 and and it is said to do 1080p.  I looked for
  ghosting in 16:9 mode instead of Just Scan mode and strangely the
  shadows are there, but they're oriented top and bottom instead of left
  and right.  I can take another photo if anyone would like to see.
 
  Why do I need to select Just Scan in order to prevent all 4 edges of
  the screen from being cut off?
 
  - Grant
 
  BTW I think you're on to something Stroller because the overall
  picture is definitely improved in 16:9 mode compared to Just Scan
  mode.  I just need to figure out how to prevent the edges of the
  screen from being cut off.
 
  - Grant
 
  Grant,
 
  By default most TVs overscan inputs due to broadcast signals at the
  edges as the picture there is not well defined and can have white
  overscan lines and such. The TV compensates by overscanning which
  basically zooms in on the picture making (on my 46 Samsung TV) the
  outer 1-1.5 of the picture disappear.
 
  On my TV it was fairly simple to turn this off, I just had to label the
  HDMI input as DVI PC and it automatically turned off any picture
  processing/overscanning. Yours may be similar.
 
  Sorry if there's typos, I have a bandaged finger and it's a PITA to type
  with. I think I fixed all of them.
 
  Dan

 I found this:

 We recommend using the Just Scan mode with 1080i and 1080p material,
 which assures zero overscan and proper 1:1 pixel matching for this
 1080p display.

 http://reviews.cnet.com/flat-panel-tvs/lg-47lh90/4505-6482_7-33485570.html#
 reviewPage1

 Just Scan is what I've always used which has the ghosting problem.  I
 think I'm back to square one.

 Just a thought:  have you approached the OEM for the TV?  If you could get to
 some technical department they would hopefully advise if this is a setting or
 hardware issue.

That may be.  I'll try that.  Please let me know if you think this may
be a software issue of some sort.

- Grant



Re: Re: [gentoo-user] Problem with xf86-video-ati nvidia-drivers

2011-07-19 Thread Daniel Frey
On 01/-10/37 11:59, Grant wrote:
--snip--
 The TV is an LG 47LH90 and and it is said to do 1080p.  I looked for
 ghosting in 16:9 mode instead of Just Scan mode and strangely the
 shadows are there, but they're oriented top and bottom instead of left
 and right.  I can take another photo if anyone would like to see.

 Why do I need to select Just Scan in order to prevent all 4 edges of
 the screen from being cut off?

 - Grant
 
 BTW I think you're on to something Stroller because the overall
 picture is definitely improved in 16:9 mode compared to Just Scan
 mode.  I just need to figure out how to prevent the edges of the
 screen from being cut off.
 
 - Grant

Grant,

By default most TVs overscan inputs due to broadcast signals at the
edges as the picture there is not well defined and can have white
overscan lines and such. The TV compensates by overscanning which
basically zooms in on the picture making (on my 46 Samsung TV) the
outer 1-1.5 of the picture disappear.

On my TV it was fairly simple to turn this off, I just had to label the
HDMI input as DVI PC and it automatically turned off any picture
processing/overscanning. Yours may be similar.

Sorry if there's typos, I have a bandaged finger and it's a PITA to type
with. I think I fixed all of them.

Dan



Re: Re: [gentoo-user] Problem with xf86-video-ati nvidia-drivers

2011-07-19 Thread Grant
 --snip--
 The TV is an LG 47LH90 and and it is said to do 1080p.  I looked for
 ghosting in 16:9 mode instead of Just Scan mode and strangely the
 shadows are there, but they're oriented top and bottom instead of left
 and right.  I can take another photo if anyone would like to see.

 Why do I need to select Just Scan in order to prevent all 4 edges of
 the screen from being cut off?

 - Grant

 BTW I think you're on to something Stroller because the overall
 picture is definitely improved in 16:9 mode compared to Just Scan
 mode.  I just need to figure out how to prevent the edges of the
 screen from being cut off.

 - Grant

 Grant,

 By default most TVs overscan inputs due to broadcast signals at the
 edges as the picture there is not well defined and can have white
 overscan lines and such. The TV compensates by overscanning which
 basically zooms in on the picture making (on my 46 Samsung TV) the
 outer 1-1.5 of the picture disappear.

 On my TV it was fairly simple to turn this off, I just had to label the
 HDMI input as DVI PC and it automatically turned off any picture
 processing/overscanning. Yours may be similar.

 Sorry if there's typos, I have a bandaged finger and it's a PITA to type
 with. I think I fixed all of them.

 Dan

I found this:

We recommend using the Just Scan mode with 1080i and 1080p material,
which assures zero overscan and proper 1:1 pixel matching for this
1080p display.

http://reviews.cnet.com/flat-panel-tvs/lg-47lh90/4505-6482_7-33485570.html#reviewPage1

Just Scan is what I've always used which has the ghosting problem.  I
think I'm back to square one.

- Grant



Re: [gentoo-user] Problem with xf86-video-ati nvidia-drivers

2011-07-19 Thread Mick
On Tuesday 19 Jul 2011 20:41:08 Grant wrote:
  --snip--
  
  The TV is an LG 47LH90 and and it is said to do 1080p.  I looked for
  ghosting in 16:9 mode instead of Just Scan mode and strangely the
  shadows are there, but they're oriented top and bottom instead of left
  and right.  I can take another photo if anyone would like to see.
  
  Why do I need to select Just Scan in order to prevent all 4 edges of
  the screen from being cut off?
  
  - Grant
  
  BTW I think you're on to something Stroller because the overall
  picture is definitely improved in 16:9 mode compared to Just Scan
  mode.  I just need to figure out how to prevent the edges of the
  screen from being cut off.
  
  - Grant
  
  Grant,
  
  By default most TVs overscan inputs due to broadcast signals at the
  edges as the picture there is not well defined and can have white
  overscan lines and such. The TV compensates by overscanning which
  basically zooms in on the picture making (on my 46 Samsung TV) the
  outer 1-1.5 of the picture disappear.
  
  On my TV it was fairly simple to turn this off, I just had to label the
  HDMI input as DVI PC and it automatically turned off any picture
  processing/overscanning. Yours may be similar.
  
  Sorry if there's typos, I have a bandaged finger and it's a PITA to type
  with. I think I fixed all of them.
  
  Dan
 
 I found this:
 
 We recommend using the Just Scan mode with 1080i and 1080p material,
 which assures zero overscan and proper 1:1 pixel matching for this
 1080p display.
 
 http://reviews.cnet.com/flat-panel-tvs/lg-47lh90/4505-6482_7-33485570.html#
 reviewPage1
 
 Just Scan is what I've always used which has the ghosting problem.  I
 think I'm back to square one.

Just a thought:  have you approached the OEM for the TV?  If you could get to 
some technical department they would hopefully advise if this is a setting or 
hardware issue.

-- 
Regards,
Mick


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Re: [gentoo-user] Problem with xf86-video-ati nvidia-drivers

2011-07-18 Thread Stroller

On 17 July 2011, at 17:54, Grant wrote:
 ...
 But at some point the 1s and 0s must be converted to some sort of an
 analog signal if only right behind the diode.  A diode must be
 presented with a signal in some sort of analog form in order to
 illuminate, right?  Digital is just a figment of our imagination after
 all.

The pixel is either on or off. There's no way to make half of the adjacent 
pixel on (and the other half of that pixel off).

Having said that, you may be on the right track. I hadn't looked at your photo 
before, so sorry for that, but it indeed looks like your telly may be doing 
some scaling on the image.

Check for overscan / underscan settings in the TV's menus and on the remote. 
The button for overscan may not be at all obvious on the remote from the icon 
that labels it - if you can't find a button on the remote that resolves this 
issue, or a overscan setting in the TV's menus then check the manual.

Overscan would cause this symptom, and it is such a common feature, that IMO 
you shouldn't pst back here again until you've identified it on your TV and 
checked it.

Stroller.




Re: [gentoo-user] Problem with xf86-video-ati nvidia-drivers

2011-07-18 Thread Grant
 ...
 But at some point the 1s and 0s must be converted to some sort of an
 analog signal if only right behind the diode.  A diode must be
 presented with a signal in some sort of analog form in order to
 illuminate, right?  Digital is just a figment of our imagination after
 all.

 The pixel is either on or off. There's no way to make half of the adjacent 
 pixel on (and the other half of that pixel off).

Well, couldn't the digital information for a particular pixel mean
blue, and the D/A mechanism attempts to create an analog signal that
the diode would interpret as blue, but the D/A converter or the analog
signal or the analog diode is affected by electric interference (which
traveled from the computer to the TV along the HDMI cable) and the
diode illuminates light blue instead of blue?

 Having said that, you may be on the right track. I hadn't looked at your 
 photo before, so sorry for that, but it indeed looks like your telly may be 
 doing some scaling on the image.

 Check for overscan / underscan settings in the TV's menus and on the remote. 
 The button for overscan may not be at all obvious on the remote from the icon 
 that labels it - if you can't find a button on the remote that resolves this 
 issue, or a overscan setting in the TV's menus then check the manual.

 Overscan would cause this symptom, and it is such a common feature, that IMO 
 you shouldn't pst back here again until you've identified it on your TV and 
 checked it.

You may be right about this.  I can select the following aspect ratios
on my TV's menu:

16:9 (this causes all 4 edges of the screen to be cut off)
Just Scan (this is what I use and it fits perfectly on the screen)
Set By Program (same as 16:9)
4:3 (same as 16:9 except with black boxes on the left and right)
Zoom (same as 16:9 except more of the image is cut off)
Cinema Zoom 1 (same as Zoom except nothing is cut off from the top of the image)

I set 1920x1080 in xorg.conf but I just tried defining no resolution
at all and it seems to have been set anyway:

(II) RADEON(0): Output HDMI-0 using initial mode 1920x1080

The TV is an LG 47LH90 and and it is said to do 1080p.  I looked for
ghosting in 16:9 mode instead of Just Scan mode and strangely the
shadows are there, but they're oriented top and bottom instead of left
and right.  I can take another photo if anyone would like to see.

Why do I need to select Just Scan in order to prevent all 4 edges of
the screen from being cut off?

- Grant



Re: [gentoo-user] Problem with xf86-video-ati nvidia-drivers

2011-07-18 Thread Grant
 But at some point the 1s and 0s must be converted to some sort of an
 analog signal if only right behind the diode.  A diode must be
 presented with a signal in some sort of analog form in order to
 illuminate, right?  Digital is just a figment of our imagination after
 all.

 The pixel is either on or off. There's no way to make half of the adjacent 
 pixel on (and the other half of that pixel off).

 Well, couldn't the digital information for a particular pixel mean
 blue, and the D/A mechanism attempts to create an analog signal that
 the diode would interpret as blue, but the D/A converter or the analog
 signal or the analog diode is affected by electric interference (which
 traveled from the computer to the TV along the HDMI cable) and the
 diode illuminates light blue instead of blue?

 Having said that, you may be on the right track. I hadn't looked at your 
 photo before, so sorry for that, but it indeed looks like your telly may be 
 doing some scaling on the image.

 Check for overscan / underscan settings in the TV's menus and on the remote. 
 The button for overscan may not be at all obvious on the remote from the 
 icon that labels it - if you can't find a button on the remote that resolves 
 this issue, or a overscan setting in the TV's menus then check the manual.

 Overscan would cause this symptom, and it is such a common feature, that IMO 
 you shouldn't pst back here again until you've identified it on your TV and 
 checked it.

 You may be right about this.  I can select the following aspect ratios
 on my TV's menu:

 16:9 (this causes all 4 edges of the screen to be cut off)
 Just Scan (this is what I use and it fits perfectly on the screen)
 Set By Program (same as 16:9)
 4:3 (same as 16:9 except with black boxes on the left and right)
 Zoom (same as 16:9 except more of the image is cut off)
 Cinema Zoom 1 (same as Zoom except nothing is cut off from the top of the 
 image)

 I set 1920x1080 in xorg.conf but I just tried defining no resolution
 at all and it seems to have been set anyway:

 (II) RADEON(0): Output HDMI-0 using initial mode 1920x1080

 The TV is an LG 47LH90 and and it is said to do 1080p.  I looked for
 ghosting in 16:9 mode instead of Just Scan mode and strangely the
 shadows are there, but they're oriented top and bottom instead of left
 and right.  I can take another photo if anyone would like to see.

 Why do I need to select Just Scan in order to prevent all 4 edges of
 the screen from being cut off?

 - Grant

BTW I think you're on to something Stroller because the overall
picture is definitely improved in 16:9 mode compared to Just Scan
mode.  I just need to figure out how to prevent the edges of the
screen from being cut off.

- Grant



Re: [gentoo-user] Problem with xf86-video-ati nvidia-drivers

2011-07-14 Thread Grant
   When I was using an Nvidia video card, I noticed a strange sort of
   fuzzy edge effect if I used nvidia-drivers.  xf86-video-nouveau didn't
   have the same problem.  Now I've switched to an ATI video card and
   unfortunately I have the same problem with xf86-video-ati.  I tried to
   enable the new modesetting radeon driver in the kernel to see if that
   would help but it doesn't work with my HD4250 card yet.  Does anyone
   know how to fix this?  Here's a photo of the effect around the mouse
   cursor:
  
   http://imageshack.us/photo/my-images/804/cursor.jpg
  
   - Grant

   The image looks to me as thos would be an analog instead of
   an digital problem.

   Put all mains connectors of you PC rig into ONE wall connector
   with something like this (ok I miss some words here again and
   since a picture says more than even thousands of /missing/ words
   here comes an image of what I mean:):
  http://www.reichelt.de/Steckdosenleisten-ohne-Schalter/6-FACH-DOSE-WS-5/index.html?;ACTION=3;LA=2;ARTICLE=108651;GROUPID=4281;SID=11Thz@On8AAAIAABaBBrE9f5418078c2ea9fe6608e9765d978595

 Thank you for taking the time to explain.  So I'm sure I understand
 what it is I should try, I should connect my computer's power cable
 and monitor's power cable to a power strip and plug that power strip
 into an outlet?

 - Grant


 Yepp! 100% correct! :)

 Good luck! :))

 Best regards,
 mcc

I gave it a try but there was no change.  I tried plugging the TV and
computer into a power strip and also into an isolation transformer.
Any other ideas?

- Grant



Re: [gentoo-user] Problem with xf86-video-ati nvidia-drivers

2011-07-14 Thread Michael Mol
On Thu, Jul 14, 2011 at 3:44 PM, Grant emailgr...@gmail.com wrote:
 I gave it a try but there was no change.  I tried plugging the TV and
 computer into a power strip and also into an isolation transformer.
 Any other ideas?

Late to the party, but what kind of display? What connection are you
using to get from the card to the display? (i.e. I've got an LCD TV
which takes DVI, HDMI or VGA. I've got a few CRTs which only VGA...)


-- 
:wq



Re: [gentoo-user] Problem with xf86-video-ati nvidia-drivers

2011-07-14 Thread Grant
 I gave it a try but there was no change.  I tried plugging the TV and
 computer into a power strip and also into an isolation transformer.
 Any other ideas?

 Late to the party, but what kind of display? What connection are you
 using to get from the card to the display? (i.e. I've got an LCD TV
 which takes DVI, HDMI or VGA. I've got a few CRTs which only VGA...)

It's a 47 LG LED HDTV connected via HDMI.

- Grant



Re: [gentoo-user] Problem with xf86-video-ati nvidia-drivers

2011-07-13 Thread Roger Mason
meino.cra...@gmx.de writes:


 Hi Grant,

 another shot into an even much deeper dark  ;)

 May be you have a problem here, which it is called Brummschleife
 in german...sorry dont know the English equivalent...may be something
 like buzzing loop...but this looks more like a strange translation 
 made by google than by any other, human being ;)
 Anyway

What you are describing that is, I think, called a ground loop in
English.

Cheers,
Roger



Re: [gentoo-user] Problem with xf86-video-ati nvidia-drivers

2011-07-13 Thread meino . cramer
Roger Mason rma...@mun.ca [11-07-13 18:12]:
 meino.cra...@gmx.de writes:
 
 
  Hi Grant,
 
  another shot into an even much deeper dark  ;)
 
  May be you have a problem here, which it is called Brummschleife
  in german...sorry dont know the English equivalent...may be something
  like buzzing loop...but this looks more like a strange translation 
  made by google than by any other, human being ;)
  Anyway
 
 What you are describing that is, I think, called a ground loop in
 English.
 
 Cheers,
 Roger
 

Hi Roger,

oh, thanks! One gap filled !!! ;)))

Best regards,
mcc




Re: [gentoo-user] Problem with xf86-video-ati nvidia-drivers

2011-07-13 Thread Grant
  When I was using an Nvidia video card, I noticed a strange sort of
  fuzzy edge effect if I used nvidia-drivers.  xf86-video-nouveau didn't
  have the same problem.  Now I've switched to an ATI video card and
  unfortunately I have the same problem with xf86-video-ati.  I tried to
  enable the new modesetting radeon driver in the kernel to see if that
  would help but it doesn't work with my HD4250 card yet.  Does anyone
  know how to fix this?  Here's a photo of the effect around the mouse
  cursor:
 
  http://imageshack.us/photo/my-images/804/cursor.jpg
 
  - Grant

  The image looks to me as thos would be an analog instead of
  an digital problem.

  Put all mains connectors of you PC rig into ONE wall connector
  with something like this (ok I miss some words here again and
  since a picture says more than even thousands of /missing/ words
  here comes an image of what I mean:):
 http://www.reichelt.de/Steckdosenleisten-ohne-Schalter/6-FACH-DOSE-WS-5/index.html?;ACTION=3;LA=2;ARTICLE=108651;GROUPID=4281;SID=11Thz@On8AAAIAABaBBrE9f5418078c2ea9fe6608e9765d978595

Thank you for taking the time to explain.  So I'm sure I understand
what it is I should try, I should connect my computer's power cable
and monitor's power cable to a power strip and plug that power strip
into an outlet?

- Grant



Re: [gentoo-user] Problem with xf86-video-ati nvidia-drivers

2011-07-13 Thread meino . cramer
Grant emailgr...@gmail.com [11-07-13 19:20]:
   When I was using an Nvidia video card, I noticed a strange sort of
   fuzzy edge effect if I used nvidia-drivers.  xf86-video-nouveau didn't
   have the same problem.  Now I've switched to an ATI video card and
   unfortunately I have the same problem with xf86-video-ati.  I tried to
   enable the new modesetting radeon driver in the kernel to see if that
   would help but it doesn't work with my HD4250 card yet.  Does anyone
   know how to fix this?  Here's a photo of the effect around the mouse
   cursor:
  
   http://imageshack.us/photo/my-images/804/cursor.jpg
  
   - Grant
 
   The image looks to me as thos would be an analog instead of
   an digital problem.
 
   Put all mains connectors of you PC rig into ONE wall connector
   with something like this (ok I miss some words here again and
   since a picture says more than even thousands of /missing/ words
   here comes an image of what I mean:):
  http://www.reichelt.de/Steckdosenleisten-ohne-Schalter/6-FACH-DOSE-WS-5/index.html?;ACTION=3;LA=2;ARTICLE=108651;GROUPID=4281;SID=11Thz@On8AAAIAABaBBrE9f5418078c2ea9fe6608e9765d978595
 
 Thank you for taking the time to explain.  So I'm sure I understand
 what it is I should try, I should connect my computer's power cable
 and monitor's power cable to a power strip and plug that power strip
 into an outlet?
 
 - Grant
 

Yepp! 100% correct! :)

Good luck! :))

Best regards,
mcc




Re: [gentoo-user] Problem with xf86-video-ati nvidia-drivers

2011-07-12 Thread Grant
 When I was using an Nvidia video card, I noticed a strange sort of
 fuzzy edge effect if I used nvidia-drivers.  xf86-video-nouveau didn't
 have the same problem.  Now I've switched to an ATI video card and
 unfortunately I have the same problem with xf86-video-ati.  I tried to
 enable the new modesetting radeon driver in the kernel to see if that
 would help but it doesn't work with my HD4250 card yet.  Does anyone
 know how to fix this?  Here's a photo of the effect around the mouse
 cursor:

 http://imageshack.us/photo/my-images/804/cursor.jpg

 - Grant


 Hi Grant,

 just a shot in the dark:
 The image looks to me as thos would be an analog instead of
 an digital problem.
 May be both propietary drivers switch to the highest possible
 data transfer rate and this triggers the problem.
 To check, whether this may be the problem:
 Instruct the driver to use either low resolution or low refresh
 rates. Check both.
 If the problem changes signifiently: Change the cables.
 May be only a pluf is not inserted correctly.
 Addtionally you can move the cables arround to see whether
 this will change the shadows around the cursor in any way...

 Good luck! :)
 Best regards
 mcc

 Thanks for that.  I'm still working on it but adding radeon.audio=0 to
 grub cleaned it up about 75%.

 - Grant

It turns out the radeon.audio=0 setting disables HDMI data packets and
puts the HDMI port in DVI mode.  mcc, I'm starting to think you had it
pretty right on.  I've tried two different cables with the same result
but I'm thinking this may be some sort of electrical interference
issue.  I deal with stuff like that in audio.  There's a USB isolator
which cleans the sound way up when used with a USB sound card:

http://www.analog.com/en/interface/digital-isolators/adum4160/products/product.html

Now I wish there was something like that for HDMI.

- Grant



Re: [gentoo-user] Problem with xf86-video-ati nvidia-drivers

2011-07-12 Thread meino . cramer
Grant emailgr...@gmail.com [11-07-13 03:13]:
  When I was using an Nvidia video card, I noticed a strange sort of
  fuzzy edge effect if I used nvidia-drivers.  xf86-video-nouveau didn't
  have the same problem.  Now I've switched to an ATI video card and
  unfortunately I have the same problem with xf86-video-ati.  I tried to
  enable the new modesetting radeon driver in the kernel to see if that
  would help but it doesn't work with my HD4250 card yet.  Does anyone
  know how to fix this?  Here's a photo of the effect around the mouse
  cursor:
 
  http://imageshack.us/photo/my-images/804/cursor.jpg
 
  - Grant
 
 
  Hi Grant,
 
  just a shot in the dark:
  The image looks to me as thos would be an analog instead of
  an digital problem.
  May be both propietary drivers switch to the highest possible
  data transfer rate and this triggers the problem.
  To check, whether this may be the problem:
  Instruct the driver to use either low resolution or low refresh
  rates. Check both.
  If the problem changes signifiently: Change the cables.
  May be only a pluf is not inserted correctly.
  Addtionally you can move the cables arround to see whether
  this will change the shadows around the cursor in any way...
 
  Good luck! :)
  Best regards
  mcc
 
  Thanks for that.  I'm still working on it but adding radeon.audio=0 to
  grub cleaned it up about 75%.
 
  - Grant
 
 It turns out the radeon.audio=0 setting disables HDMI data packets and
 puts the HDMI port in DVI mode.  mcc, I'm starting to think you had it
 pretty right on.  I've tried two different cables with the same result
 but I'm thinking this may be some sort of electrical interference
 issue.  I deal with stuff like that in audio.  There's a USB isolator
 which cleans the sound way up when used with a USB sound card:
 
 http://www.analog.com/en/interface/digital-isolators/adum4160/products/product.html
 
 Now I wish there was something like that for HDMI.
 
 - Grant
 

Hi Grant,

another shot into an even much deeper dark  ;)

May be you have a problem here, which it is called Brummschleife
in german...sorry dont know the English equivalent...may be something
like buzzing loop...but this looks more like a strange translation 
made by google than by any other, human being ;)
Anyway

A Brummschleife happens when doing something like this:

  ++  +---+
--+|-(1)--+ monitor or|-
mains | PC |-(2)--| amplifier |mains
 
--+|(audio/USB/video or   + or.   |-
-+++ another low voltage  +---+---+-

 |   thingy)  | 
   
 (3)(4)
 || 
   
 __ 
   
 ground   ground
   


 Normally all protective earth's connection should end in ONE point: A
 copper rod or someting like this.
 BUT often the wires between them are too long or there are two or
 even more end points. Result: HF from near by broadcast stations,
 60Hz mains frequency, ham radio station, microwave ovens and anything
 which can emit energy, pushes protective earth to another electrical
 potential than 0V.
 Since both, PC and -- in your case -- the monitor are using
 protective earth, they may be put on another, may be even
 varying (over time) electrical potentials. Since they are connected 
 via a two-wire connection WITHOUT protective earth (no, the shielding 
 is not for that purpose) the difference in the potential earth put 
 both ends to different electrical reference points.
 This way you get an amplitude modulation of the signal between both
 endpoint. In case of 60HZ you will hear a Brummschleife sound on
 audio connection (a buzzing sound), in case of frequencies near 
 those of the video signal you will get ghosts in the monitor picture.

 Now, how to avoid that.
 Hit the one who have made the protective earth connection in your
 house.
 While you are searching for that person, you can try the following:
 Put all mains connectors of you PC rig into ONE wall connector
 with something like this (ok I miss some words here again and 
 since a picture says more than even thousands of /missing/ words
 here comes an image of what I mean:):
http://www.reichelt.de/Steckdosenleisten-ohne-Schalter/6-FACH-DOSE-WS-5/index.html?;ACTION=3;LA=2;ARTICLE=108651;GROUPID=4281;SID=11Thz@On8AAAIAABaBBrE9f5418078c2ea9fe6608e9765d978595

This way, all protective earth ends up in the same contact. No
differences in the electricla potential of the protective earth
anymore.

Why does the those USB-isolatore-like cables help here?

These small air core 

Re: [gentoo-user] Problem with xf86-video-ati nvidia-drivers

2011-07-11 Thread Grant
 When I was using an Nvidia video card, I noticed a strange sort of
 fuzzy edge effect if I used nvidia-drivers.  xf86-video-nouveau didn't
 have the same problem.  Now I've switched to an ATI video card and
 unfortunately I have the same problem with xf86-video-ati.  I tried to
 enable the new modesetting radeon driver in the kernel to see if that
 would help but it doesn't work with my HD4250 card yet.  Does anyone
 know how to fix this?  Here's a photo of the effect around the mouse
 cursor:

 http://imageshack.us/photo/my-images/804/cursor.jpg

 - Grant


 Hi Grant,

 just a shot in the dark:
 The image looks to me as thos would be an analog instead of
 an digital problem.
 May be both propietary drivers switch to the highest possible
 data transfer rate and this triggers the problem.
 To check, whether this may be the problem:
 Instruct the driver to use either low resolution or low refresh
 rates. Check both.
 If the problem changes signifiently: Change the cables.
 May be only a pluf is not inserted correctly.
 Addtionally you can move the cables arround to see whether
 this will change the shadows around the cursor in any way...

 Good luck! :)
 Best regards
 mcc

Thanks for that.  I'm still working on it but adding radeon.audio=0 to
grub cleaned it up about 75%.

- Grant



Re: [gentoo-user] Problem with xf86-video-ati nvidia-drivers

2011-07-09 Thread meino . cramer
Grant emailgr...@gmail.com [11-07-10 01:42]:
 When I was using an Nvidia video card, I noticed a strange sort of
 fuzzy edge effect if I used nvidia-drivers.  xf86-video-nouveau didn't
 have the same problem.  Now I've switched to an ATI video card and
 unfortunately I have the same problem with xf86-video-ati.  I tried to
 enable the new modesetting radeon driver in the kernel to see if that
 would help but it doesn't work with my HD4250 card yet.  Does anyone
 know how to fix this?  Here's a photo of the effect around the mouse
 cursor:
 
 http://imageshack.us/photo/my-images/804/cursor.jpg
 
 - Grant
 

Hi Grant,

just a shot in the dark:
The image looks to me as thos would be an analog instead of
an digital problem.
May be both propietary drivers switch to the highest possible
data transfer rate and this triggers the problem.
To check, whether this may be the problem:
Instruct the driver to use either low resolution or low refresh 
rates. Check both.
If the problem changes signifiently: Change the cables.
May be only a pluf is not inserted correctly.
Addtionally you can move the cables arround to see whether
this will change the shadows around the cursor in any way...

Good luck! :)
Best regards
mcc