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Who is using Multi-Head display with SNAP?
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Dariusz Piatkowski
Nov 27, 2012, 12:26:55 AM11/27/12
to
OK...who's got this running?
I've had my 1920x1200 single LCD display running for about 2 yrs now (ATI X850
XT PE & Samsung 245T panel).
The time has now come to venture beyond the forbidden wall and join the
remainder of happy computing devotees...LOL...so yeah, I want to be spoiled with
a multiple display setup.
I picked up another 245T, hooked it up to my card, this new LCD to a 2nd DVI
port, but using the DSUB converter since the SNAP drivers (latest officially
available release) will not support 2 DVI ports on the ATI card.
The SNAP drivers themselves have 2 HEADs defined, using a native resolution of
1920x1200. This gives me a total of 3840x1200 on SCREEN1 of the SNAP drivers
window, which is what I select.
The end result???
Well, the main display (HEAD1) shows up fine using 1920x1200, the 2nd display
(HEAD2) however uses a strange 960x1200 resolution, and as expected is
completely garbled as this is nowhere near the panel's native 1920x1200
resolution.
Now here is the weird part. I had originally had a very similar issue with my
HEAD1 panel, and this was not fixed until I re-programmed the LCD EDID to remove
a 'Detailing Timing' block which specified the funky 960x1200 resolution.
Therefore, I had assumed that the new LCD was also being affected by the same
problem. OK, no worries, I re-programmed the EDID, removed teh 960x1200 mode and
replaced it with the 1920x1200 (using the proper timing values, etc, etc).
Strangely enough, SNAP still insists on showing the 2nd HEAD in the 960x1200
mode.
I then deleted the CRTC00.dat & CRTC10.dat and MON00.dat & MON10.dat files, no
effect though. The files were re-created upon boot and my HEAD2 remained trapped
in the 960x1200 mode.
And this is where I am currently stuck. I can not figure out what else in the
SNAP driver drives the 2nd display HEAD. None of the GAxxx utilities show the
dreaded 960x1200 resolution, so as best as I can tell it does NOT even exist.
My next thought is the install a 2nd ATI X850 XT PE video card in the system in
hopes that I can drive the 2nd LCD using the primary DVI connector (it does
actually give a better quality display here). Not sure whether this would work
at all...very experimental...although it seems like SNAP should not have any
issues recognizing the display controller.
Any thoughts???
Should I be deleting the OPTIONS.DAT file? How about the RADEX850.00 in the
'config' directory? Is there anything in the INI files to go after? I searched,
but didn't find the culprit...
Thanks!
I've had my 1920x1200 single LCD display running for about 2 yrs now (ATI X850
XT PE & Samsung 245T panel).
The time has now come to venture beyond the forbidden wall and join the
remainder of happy computing devotees...LOL...so yeah, I want to be spoiled with
a multiple display setup.
I picked up another 245T, hooked it up to my card, this new LCD to a 2nd DVI
port, but using the DSUB converter since the SNAP drivers (latest officially
available release) will not support 2 DVI ports on the ATI card.
The SNAP drivers themselves have 2 HEADs defined, using a native resolution of
1920x1200. This gives me a total of 3840x1200 on SCREEN1 of the SNAP drivers
window, which is what I select.
The end result???
Well, the main display (HEAD1) shows up fine using 1920x1200, the 2nd display
(HEAD2) however uses a strange 960x1200 resolution, and as expected is
completely garbled as this is nowhere near the panel's native 1920x1200
resolution.
Now here is the weird part. I had originally had a very similar issue with my
HEAD1 panel, and this was not fixed until I re-programmed the LCD EDID to remove
a 'Detailing Timing' block which specified the funky 960x1200 resolution.
Therefore, I had assumed that the new LCD was also being affected by the same
problem. OK, no worries, I re-programmed the EDID, removed teh 960x1200 mode and
replaced it with the 1920x1200 (using the proper timing values, etc, etc).
Strangely enough, SNAP still insists on showing the 2nd HEAD in the 960x1200
mode.
I then deleted the CRTC00.dat & CRTC10.dat and MON00.dat & MON10.dat files, no
effect though. The files were re-created upon boot and my HEAD2 remained trapped
in the 960x1200 mode.
And this is where I am currently stuck. I can not figure out what else in the
SNAP driver drives the 2nd display HEAD. None of the GAxxx utilities show the
dreaded 960x1200 resolution, so as best as I can tell it does NOT even exist.
My next thought is the install a 2nd ATI X850 XT PE video card in the system in
hopes that I can drive the 2nd LCD using the primary DVI connector (it does
actually give a better quality display here). Not sure whether this would work
at all...very experimental...although it seems like SNAP should not have any
issues recognizing the display controller.
Any thoughts???
Should I be deleting the OPTIONS.DAT file? How about the RADEX850.00 in the
'config' directory? Is there anything in the INI files to go after? I searched,
but didn't find the culprit...
Thanks!
Steve Wendt
Nov 27, 2012, 1:09:22 AM11/27/12
to
On 11/26/12 09:26 pm, Dariusz Piatkowski wrote:
> Now here is the weird part. I had originally had a very similar issue with my
> HEAD1 panel, and this was not fixed until I re-programmed the LCD EDID to remove
> a 'Detailing Timing' block which specified the funky 960x1200 resolution.
> Therefore, I had assumed that the new LCD was also being affected by the same
> problem. OK, no worries, I re-programmed the EDID, removed teh 960x1200 mode and
> replaced it with the 1920x1200 (using the proper timing values, etc, etc).
> Strangely enough, SNAP still insists on showing the 2nd HEAD in the 960x1200
> mode.
Weird indeed... out of curiosity, if you swap the primary and secondary
> Now here is the weird part. I had originally had a very similar issue with my
> HEAD1 panel, and this was not fixed until I re-programmed the LCD EDID to remove
> a 'Detailing Timing' block which specified the funky 960x1200 resolution.
> Therefore, I had assumed that the new LCD was also being affected by the same
> problem. OK, no worries, I re-programmed the EDID, removed teh 960x1200 mode and
> replaced it with the 1920x1200 (using the proper timing values, etc, etc).
> Strangely enough, SNAP still insists on showing the 2nd HEAD in the 960x1200
> mode.
monitors, does the problem follow the output head, or the monitor?
> My next thought is the install a 2nd ATI X850 XT PE video card in the system in
> hopes that I can drive the 2nd LCD using the primary DVI connector (it does
> actually give a better quality display here). Not sure whether this would work
> at all...very experimental...although it seems like SNAP should not have any
> issues recognizing the display controller.
functional... the multi-controller support was mainly used for custom
stuff (ATM machines).
> Should I be deleting the OPTIONS.DAT file? How about the RADEX850.00 in the
> 'config' directory? Is there anything in the INI files to go after?
options (gaoption show global), which doesn't seem related. I wouldn't
expect the chipset-specific options file to be relevant either, but it
doesn't hurt to try moving it out?
Steve Wendt
Nov 27, 2012, 1:11:17 AM11/27/12
to
On 11/26/12 10:09 pm, Steve Wendt wrote:
>> Strangely enough, SNAP still insists on showing the 2nd HEAD in the
>> 960x1200 mode.
>
> Weird indeed... out of curiosity, if you swap the primary and secondary
> monitors, does the problem follow the output head, or the monitor?
Something else to try - above/below instead of side-by-side. In other
>> Strangely enough, SNAP still insists on showing the 2nd HEAD in the
>> 960x1200 mode.
>
> Weird indeed... out of curiosity, if you swap the primary and secondary
> monitors, does the problem follow the output head, or the monitor?
words, does 1920x2400 have similar results?
Andreas Buchinger
Nov 27, 2012, 3:49:27 PM11/27/12
to
Dariusz Piatkowski schrieb:
>.....
I do with two 1920x1200 displays and ATI X300. Only minor problem is when the cursor is on the right
display then it is also displayed at the very left row on the left display. This seems to be a
problem with the hardware cursor handling of SNAP or the X300.
Beside that I don't think I've let SNAP import INF data but not sure anymore. I only use (Standard
monitor types) - Unknown monitor.
Btw. one of the monitors is a 245B connected on the VGA output as the X300 unfortunately does not
have 2 DVIs.
HTH
> OK...who's got this running?
>
> I've had my 1920x1200 single LCD display running for about 2 yrs now (ATI X850
> XT PE& Samsung 245T panel)......
>
> I've had my 1920x1200 single LCD display running for about 2 yrs now (ATI X850
>.....
I do with two 1920x1200 displays and ATI X300. Only minor problem is when the cursor is on the right
display then it is also displayed at the very left row on the left display. This seems to be a
problem with the hardware cursor handling of SNAP or the X300.
Beside that I don't think I've let SNAP import INF data but not sure anymore. I only use (Standard
monitor types) - Unknown monitor.
Btw. one of the monitors is a 245B connected on the VGA output as the X300 unfortunately does not
have 2 DVIs.
HTH
Dariusz Piatkowski
Nov 27, 2012, 5:53:34 PM11/27/12
to
Hi Andreas!
On Tue, 27 Nov 2012 20:49:27 UTC, Andreas Buchinger <Send...@your.address>
wrote:
OK, how do you get the 'Unknown Monitor' selection to give you a 1920x1200
resolution?
I have attempted that route already but at most this gives me a
1280x1024...hmm...aha!!! strange indeed...but now that I have reverted to my
known/good 1920x1200 (single LCD) configuration I can now select the 'Unknown
Monitor' and sure enough...1920x1200 is still there.
I suspect I have a problem with the LCD EDID and somehow SNAP is using the
HEAD_0 information to drive HEAD_1...buggy if you ask me...but I can't for the
life of me figure out the logic SNAP is using to determine what timings are
meant for what display.
I'm going to re-boot now to see if the 'Unknown Monitor' selection overrides the
invalid EDID on the panel.
Thanks!
On Tue, 27 Nov 2012 20:49:27 UTC, Andreas Buchinger <Send...@your.address>
wrote:
resolution?
I have attempted that route already but at most this gives me a
1280x1024...hmm...aha!!! strange indeed...but now that I have reverted to my
known/good 1920x1200 (single LCD) configuration I can now select the 'Unknown
Monitor' and sure enough...1920x1200 is still there.
I suspect I have a problem with the LCD EDID and somehow SNAP is using the
HEAD_0 information to drive HEAD_1...buggy if you ask me...but I can't for the
life of me figure out the logic SNAP is using to determine what timings are
meant for what display.
I'm going to re-boot now to see if the 'Unknown Monitor' selection overrides the
invalid EDID on the panel.
Thanks!
Dariusz Piatkowski
Nov 27, 2012, 6:04:57 PM11/27/12
to
Hi Steve!
On Tue, 27 Nov 2012 06:09:22 UTC, Steve Wendt <spa...@forgetit.org> wrote:
> On 11/26/12 09:26 pm, Dariusz Piatkowski wrote:
>
> > Now here is the weird part. I had originally had a very similar issue with my
> > HEAD1 panel, and this was not fixed until I re-programmed the LCD EDID to remove
> > a 'Detailing Timing' block which specified the funky 960x1200 resolution.
> > Therefore, I had assumed that the new LCD was also being affected by the same
> > problem. OK, no worries, I re-programmed the EDID, removed teh 960x1200 mode and
> > replaced it with the 1920x1200 (using the proper timing values, etc, etc).
> > Strangely enough, SNAP still insists on showing the 2nd HEAD in the 960x1200
> > mode.
>
> Weird indeed... out of curiosity, if you swap the primary and secondary
> monitors, does the problem follow the output head, or the monitor?
Yup, tried that this afternoon and the results were somewhat mixed. Basically,
up to the 1600x1200 I could actually get the 2 displays to behave...but as soon
as I went above, into the native panel resolution things went bad.
So I'm guessing the EDID re-programming I had originally done on my HEAD_0 LCD,
while sufficient enough to get me to the 1920x1200 mode back then is now causing
SNAP some grief as it's attempting to figure out the capability of the HEAD_1
LCD.
> > My next thought is the install a 2nd ATI X850 XT PE video card in the system in
> > hopes that I can drive the 2nd LCD using the primary DVI connector (it does
> > actually give a better quality display here). Not sure whether this would work
> > at all...very experimental...although it seems like SNAP should not have any
> > issues recognizing the display controller.
>
> I don't think splitting the display across two video cards is
> functional... the multi-controller support was mainly used for custom
> stuff (ATM machines).
Worth a try...sort of an experiment...I'll keep my eyes open for a decently
priced X850 out there...once I have it it's just a matter of popping it into my
system, booting and seeing what gets tossed into the graphics.log file.
> > Should I be deleting the OPTIONS.DAT file? How about the RADEX850.00 in the
> > 'config' directory? Is there anything in the INI files to go after?
>
> SNAP itself doesn't use the INI files. The options.dat is for global
> options (gaoption show global), which doesn't seem related. I wouldn't
> expect the chipset-specific options file to be relevant either, but it
> doesn't hurt to try moving it out?
Indeed...I wiped the system 'clean', short of un-installing and re-installing
SNAP. This means I removed crtc00 & crtc10 and mon00 & mon10 files. I then
removed the options.dat file as well. Re-booting allowed the SNAP driver to
re-create this...but the issue persisted...so I'm guessing it's pulling this off
of the EDID I have in the primary panel.
I am now trying the 'Unknown Monitor' in the 1920x1200 mode with DDC detection
disabled.
Re-boot...here we go...!!! lol
Thanks!
On Tue, 27 Nov 2012 06:09:22 UTC, Steve Wendt <spa...@forgetit.org> wrote:
> On 11/26/12 09:26 pm, Dariusz Piatkowski wrote:
>
> > Now here is the weird part. I had originally had a very similar issue with my
> > HEAD1 panel, and this was not fixed until I re-programmed the LCD EDID to remove
> > a 'Detailing Timing' block which specified the funky 960x1200 resolution.
> > Therefore, I had assumed that the new LCD was also being affected by the same
> > problem. OK, no worries, I re-programmed the EDID, removed teh 960x1200 mode and
> > replaced it with the 1920x1200 (using the proper timing values, etc, etc).
> > Strangely enough, SNAP still insists on showing the 2nd HEAD in the 960x1200
> > mode.
>
> Weird indeed... out of curiosity, if you swap the primary and secondary
> monitors, does the problem follow the output head, or the monitor?
up to the 1600x1200 I could actually get the 2 displays to behave...but as soon
as I went above, into the native panel resolution things went bad.
So I'm guessing the EDID re-programming I had originally done on my HEAD_0 LCD,
while sufficient enough to get me to the 1920x1200 mode back then is now causing
SNAP some grief as it's attempting to figure out the capability of the HEAD_1
LCD.
> > My next thought is the install a 2nd ATI X850 XT PE video card in the system in
> > hopes that I can drive the 2nd LCD using the primary DVI connector (it does
> > actually give a better quality display here). Not sure whether this would work
> > at all...very experimental...although it seems like SNAP should not have any
> > issues recognizing the display controller.
>
> I don't think splitting the display across two video cards is
> functional... the multi-controller support was mainly used for custom
> stuff (ATM machines).
priced X850 out there...once I have it it's just a matter of popping it into my
system, booting and seeing what gets tossed into the graphics.log file.
> > Should I be deleting the OPTIONS.DAT file? How about the RADEX850.00 in the
> > 'config' directory? Is there anything in the INI files to go after?
>
> SNAP itself doesn't use the INI files. The options.dat is for global
> options (gaoption show global), which doesn't seem related. I wouldn't
> expect the chipset-specific options file to be relevant either, but it
> doesn't hurt to try moving it out?
SNAP. This means I removed crtc00 & crtc10 and mon00 & mon10 files. I then
removed the options.dat file as well. Re-booting allowed the SNAP driver to
re-create this...but the issue persisted...so I'm guessing it's pulling this off
of the EDID I have in the primary panel.
I am now trying the 'Unknown Monitor' in the 1920x1200 mode with DDC detection
disabled.
Re-boot...here we go...!!! lol
Thanks!
Dariusz Piatkowski
Nov 27, 2012, 6:05:32 PM11/27/12
to
remained in place on HEAD_1.
Andreas Kohl
Nov 28, 2012, 12:17:48 PM11/28/12
to
You will have to activate also wide screen resolutions for "Unknown
monitor". In production environments I'm using Matrox (450/550) cards
with multiple video outputs successfully. And ATI FireMV (PCIe) works
also with SNAP, but I did not enough testing.
Andreas
monitor". In production environments I'm using Matrox (450/550) cards
with multiple video outputs successfully. And ATI FireMV (PCIe) works
also with SNAP, but I did not enough testing.
Andreas
Andreas Buchinger
Nov 28, 2012, 5:10:49 PM11/28/12
to
Dariusz Piatkowski schrieb:
> Hi Andreas!
>
> On Tue, 27 Nov 2012 20:49:27 UTC, Andreas Buchinger<Send...@your.address>
> wrote:
>
>> Dariusz Piatkowski schrieb:
>>> OK...who's got this running?
>>>
>>> I've had my 1920x1200 single LCD display running for about 2 yrs now (ATI X850
>>> XT PE& Samsung 245T panel)......
>> >.....
>>
>> I do with two 1920x1200 displays and ATI X300. Only minor problem is when the cursor is on the right
>> display then it is also displayed at the very left row on the left display. This seems to be a
>> problem with the hardware cursor handling of SNAP or the X300.
>>
>> Beside that I don't think I've let SNAP import INF data but not sure anymore. I only use (Standard
>> monitor types) - Unknown monitor.
>>
>> Btw. one of the monitors is a 245B connected on the VGA output as the X300 unfortunately does not
>> have 2 DVIs.
>
>
> OK, how do you get the 'Unknown Monitor' selection to give you a 1920x1200
> resolution?
Maybe I've used gamode add .... but don't remember anymore. Sorry.
>
> On Tue, 27 Nov 2012 20:49:27 UTC, Andreas Buchinger<Send...@your.address>
> wrote:
>
>> Dariusz Piatkowski schrieb:
>>> OK...who's got this running?
>>>
>>> I've had my 1920x1200 single LCD display running for about 2 yrs now (ATI X850
>>> XT PE& Samsung 245T panel)......
>> >.....
>>
>> I do with two 1920x1200 displays and ATI X300. Only minor problem is when the cursor is on the right
>> display then it is also displayed at the very left row on the left display. This seems to be a
>> problem with the hardware cursor handling of SNAP or the X300.
>>
>> Beside that I don't think I've let SNAP import INF data but not sure anymore. I only use (Standard
>> monitor types) - Unknown monitor.
>>
>> Btw. one of the monitors is a 245B connected on the VGA output as the X300 unfortunately does not
>> have 2 DVIs.
>
>
> OK, how do you get the 'Unknown Monitor' selection to give you a 1920x1200
> resolution?
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