How do I change a Windows 7 IRQ interrupt assignment?

[a@b.c]

I am using an XFX video card based on the ATI 5450 chip. I like to use

the 1280x800 resolution. This works fine in Windows XP with my

Samsung T220 monitor.



But with Windows 7 it does not display properly. The monitor is

getting a signal which says there are 960 vertical lines rather than

the 800 vertical lines Windows is set for. So the image is compressed

vertically and there's black space at the top and bottom since there

are only 800 lines in the image and the monitor thinks there should be

960. This is with ATI's latest 10.3 drivers.



In XP the display adapter uses interrupt 16 but with W7 is uses some

sort of simulated interrupt with a strange long number.



Is there a way I can change W7 to use interrupt 16 for the video card?



Also I remember that in XP you could press F5 during installation and

get an option to install without interrupt sharing. Is there

something similar in W7 and should I try a re-install?



THANKS IN ADVANCE.

 

[johnbee]

wrote in message news:iihqs5p3rcoc8j4ebmrjn8e3ohftebr90n@4ax.com...

> I am using an XFX video card based on the ATI 5450 chip. I like to use

> the 1280x800 resolution. This works fine in Windows XP with my

> Samsung T220 monitor.

>

> But with Windows 7 it does not display properly. The monitor is

> getting a signal which says there are 960 vertical lines rather than

> the 800 vertical lines Windows is set for. So the image is compressed

> vertically and there's black space at the top and bottom since there

> are only 800 lines in the image and the monitor thinks there should be

> 960. This is with ATI's latest 10.3 drivers.

>

> In XP the display adapter uses interrupt 16 but with W7 is uses some

> sort of simulated interrupt with a strange long number.

>

> Is there a way I can change W7 to use interrupt 16 for the video card?

>

> Also I remember that in XP you could press F5 during installation and

> get an option to install without interrupt sharing. Is there

> something similar in W7 and should I try a re-install?

>

> THANKS IN ADVANCE.

>



I will say something in case nobody knows the exact answers to what you ask.

The Windows 7 documentation, help system, and all the books I have read

(well, both of them, The Windows Bible and the Administrator's Pocket

Consultant) are very adamant that you should use the standard display

settings for your monitor.



They have done something to the monitor functions in Windows 7 because much

software does not work even if one just chooses to up the screen text size

by clicking on preferences. So that, coupled with the urging to use the

monitor's native settings seems to me to mean that they know it does not

work as flexibly as previous versions. (I know nothing of Vista as I missed

it out).



Just in case you have not done this, type msinfo32 into the search programs

and files box on the Start menu. That will give a list of IRQ numbers -

mine are all the usual little ones except for three labelled hub.

 

[c_atiel]

This is not an IRQ problem.

It may seem silly but make sure the cable to your monitor is properly seated

and the correct monitor/monitor model is identified by both the Catalyst

Control Center and Vista SP3.

There are ways to change the IRQ but if you really understood what that

meant you would already know how to do it. Changing the IRQ will not solve

your issue.

The native resolution reported on a search of Samsung T220 is given as 1680

x 1050.

If you run it at a lower resolution image quality falls off markedly. The

image on most LCD panels at lower resolutions can be blurred and nauseating

but its your choice. These are not plasma HDTVs but cheapo 6 bit dithered

consumer LCDs.

The ATI Catalyst control center should give 1280 x 800 as a choice (mine

does) as should the Vista SP3 display control for a panel of that height and

width ratio.

If you are not seeing these resolutions offered then something is wrong with

the way your monitor is identified by the video card.

Some poorly written data base front ends for business will not run at the

higher resolutions of modern LCDs because data columns and rows will not

align properly.

Apart from that I cannot imagine why you would want to run an LCD at a lower

than native resolution--you can adjust font and Icon sizes to suit your

taste and myopia.

 

[Gene E. Bloch]

On Mon, 19 Apr 2010 23:25:30 -0700, a@b.c wrote:



> I am using an XFX video card based on the ATI 5450 chip. I like to use

> the 1280x800 resolution. This works fine in Windows XP with my

> Samsung T220 monitor.

>

> But with Windows 7 it does not display properly. The monitor is

> getting a signal which says there are 960 vertical lines rather than

> the 800 vertical lines Windows is set for. So the image is compressed

> vertically and there's black space at the top and bottom since there

> are only 800 lines in the image and the monitor thinks there should be

> 960. This is with ATI's latest 10.3 drivers.

>

> In XP the display adapter uses interrupt 16 but with W7 is uses some

> sort of simulated interrupt with a strange long number.

>

> Is there a way I can change W7 to use interrupt 16 for the video card?

>

> Also I remember that in XP you could press F5 during installation and

> get an option to install without interrupt sharing. Is there

> something similar in W7 and should I try a re-install?

>

> THANKS IN ADVANCE.



This is not the native resolution of 1680 x 1050, so something's got to

give.



Either the video card expands the picture to fill the screen - which can

look pretty crappy - or it puts out one pixel per actual screen pixel,

which makes the image not fill the screen.



There's possibly a setting in the video driver or even in the monitor's

on-board setup to make this choice (I've owned monitors where the selection

is in the monitor's on-board setup).



--

Gene E. Bloch letters0x40blochg0x2Ecom

 

[a@b.c]

On Tue, 20 Apr 2010 19:53:29 +0100, "johnbee"

wrote:



>

> wrote in message news:iihqs5p3rcoc8j4ebmrjn8e3ohftebr90n@4ax.com...

>> I am using an XFX video card based on the ATI 5450 chip. I like to use

>> the 1280x800 resolution. This works fine in Windows XP with my

>> Samsung T220 monitor.

>>

>> But with Windows 7 it does not display properly. The monitor is

>> getting a signal which says there are 960 vertical lines rather than

>> the 800 vertical lines Windows is set for. So the image is compressed

>> vertically and there's black space at the top and bottom since there

>> are only 800 lines in the image and the monitor thinks there should be

>> 960. This is with ATI's latest 10.3 drivers.

>>

>> In XP the display adapter uses interrupt 16 but with W7 is uses some

>> sort of simulated interrupt with a strange long number.

>>

>> Is there a way I can change W7 to use interrupt 16 for the video card?

>>

>> Also I remember that in XP you could press F5 during installation and

>> get an option to install without interrupt sharing. Is there

>> something similar in W7 and should I try a re-install?

>>

>> THANKS IN ADVANCE.

>>

>

>I will say something in case nobody knows the exact answers to what you ask.

>The Windows 7 documentation, help system, and all the books I have read

>(well, both of them, The Windows Bible and the Administrator's Pocket

>Consultant) are very adamant that you should use the standard display

>settings for your monitor.

>

>They have done something to the monitor functions in Windows 7 because much

>software does not work even if one just chooses to up the screen text size

>by clicking on preferences. So that, coupled with the urging to use the

>monitor's native settings seems to me to mean that they know it does not

>work as flexibly as previous versions. (I know nothing of Vista as I missed

>it out).

>

>Just in case you have not done this, type msinfo32 into the search programs

>and files box on the Start menu. That will give a list of IRQ numbers -

>mine are all the usual little ones except for three labelled hub.





Thanks for your help. I'll have to live with the 1680x1050 resolution

until ATI or somebody fixes this. I set W7 to used the Medium screen

sizing option so most things are resized bigger but I see some stuff

just doesn't resize and work properly. My interrupt table says the

video card is using IRQ 4294967294 which sounds like some sort of

simulated interrupt. I seem to remember that when XP first came out I

had similar problems with an older ATI card and was only able to solve

them by installing XP for a generic computer using the F5 option. I

don't remember if I did this the last time I reinstalled XP or if ATI

fixed the drivers. I've sent a report to ATI about this so maybe

they'll fix it soon. Thanks again.

 

[SC Tom]

wrote in message news:l5tss51oq0iar37au5efvagu5mam0f92qh@4ax.com...

> On Tue, 20 Apr 2010 19:53:29 +0100, "johnbee"

> wrote:

>

>>

>> wrote in message

>>news:iihqs5p3rcoc8j4ebmrjn8e3ohftebr90n@4ax.com...

>>> I am using an XFX video card based on the ATI 5450 chip. I like to use

>>> the 1280x800 resolution. This works fine in Windows XP with my

>>> Samsung T220 monitor.

>>>

>>> But with Windows 7 it does not display properly. The monitor is

>>> getting a signal which says there are 960 vertical lines rather than

>>> the 800 vertical lines Windows is set for. So the image is compressed

>>> vertically and there's black space at the top and bottom since there

>>> are only 800 lines in the image and the monitor thinks there should be

>>> 960. This is with ATI's latest 10.3 drivers.

>>>

>>> In XP the display adapter uses interrupt 16 but with W7 is uses some

>>> sort of simulated interrupt with a strange long number.

>>>

>>> Is there a way I can change W7 to use interrupt 16 for the video card?

>>>

>>> Also I remember that in XP you could press F5 during installation and

>>> get an option to install without interrupt sharing. Is there

>>> something similar in W7 and should I try a re-install?

>>>

>>> THANKS IN ADVANCE.

>>>

>>

>>I will say something in case nobody knows the exact answers to what you

>>ask.

>>The Windows 7 documentation, help system, and all the books I have read

>>(well, both of them, The Windows Bible and the Administrator's Pocket

>>Consultant) are very adamant that you should use the standard display

>>settings for your monitor.

>>

>>They have done something to the monitor functions in Windows 7 because

>>much

>>software does not work even if one just chooses to up the screen text size

>>by clicking on preferences. So that, coupled with the urging to use the

>>monitor's native settings seems to me to mean that they know it does not

>>work as flexibly as previous versions. (I know nothing of Vista as I

>>missed

>>it out).

>>

>>Just in case you have not done this, type msinfo32 into the search

>>programs

>>and files box on the Start menu. That will give a list of IRQ numbers -

>>mine are all the usual little ones except for three labelled hub.

>

>

> Thanks for your help. I'll have to live with the 1680x1050 resolution

> until ATI or somebody fixes this. I set W7 to used the Medium screen

> sizing option so most things are resized bigger but I see some stuff

> just doesn't resize and work properly. My interrupt table says the

> video card is using IRQ 4294967294 which sounds like some sort of

> simulated interrupt. I seem to remember that when XP first came out I

> had similar problems with an older ATI card and was only able to solve

> them by installing XP for a generic computer using the F5 option. I

> don't remember if I did this the last time I reinstalled XP or if ATI

> fixed the drivers. I've sent a report to ATI about this so maybe

> they'll fix it soon. Thanks again.



The IRQ on my notebook with the ATI Mobility Radeon HD2600 PCIe is the same

as yours, with my Intel wireless adapter being one less. Things that make

you go "Huh!"

One thing I found in your manual is that 1280x800 is not a native preset for

that monitor, so that may be part of the problem. One thing you might try if

you have the hardware is to change the way you're connected. For example, if

you currently have it connected via the DVI port, try connecting it to the

D-sub port. If you're video card doesn't have a D-sub out, you could try a

DVI-to-DSUB adaptor.

Since there is no monitor driver for Win7, you can right-click the setup

file you have (which is probably for Vista?) and select Properties,

Compatibility, check the box next to "Run this program in compatibility mode

for:" and pick Vista Service Pack 2. Win7 should then show the monitor as

what it is. This link is for the driver through Vista:

http://www.samsung.com/us/support/d...cd=&prd_mdl_name=T220HD&prd_ia_sub_class_cd=P

They haven't released one for Win7 and probably won't if they haven't by

now.

--

SC Tom

 

[SC Tom]

"SC Tom" wrote in message

newskDzn.243537$wr5.144930@newsfe22.iad...

>

> wrote in message

> news:l5tss51oq0iar37au5efvagu5mam0f92qh@4ax.com...

>> On Tue, 20 Apr 2010 19:53:29 +0100, "johnbee"

>> wrote:

>>

>>>

>>> wrote in message

>>>news:iihqs5p3rcoc8j4ebmrjn8e3ohftebr90n@4ax.com...

>>>> I am using an XFX video card based on the ATI 5450 chip. I like to use

>>>> the 1280x800 resolution. This works fine in Windows XP with my

>>>> Samsung T220 monitor.

>>>>

>>>> But with Windows 7 it does not display properly. The monitor is

>>>> getting a signal which says there are 960 vertical lines rather than

>>>> the 800 vertical lines Windows is set for. So the image is compressed

>>>> vertically and there's black space at the top and bottom since there

>>>> are only 800 lines in the image and the monitor thinks there should be

>>>> 960. This is with ATI's latest 10.3 drivers.

>>>>

>>>> In XP the display adapter uses interrupt 16 but with W7 is uses some

>>>> sort of simulated interrupt with a strange long number.

>>>>

>>>> Is there a way I can change W7 to use interrupt 16 for the video card?

>>>>

>>>> Also I remember that in XP you could press F5 during installation and

>>>> get an option to install without interrupt sharing. Is there

>>>> something similar in W7 and should I try a re-install?

>>>>

>>>> THANKS IN ADVANCE.

>>>>

>>>

>>>I will say something in case nobody knows the exact answers to what you

>>>ask.

>>>The Windows 7 documentation, help system, and all the books I have read

>>>(well, both of them, The Windows Bible and the Administrator's Pocket

>>>Consultant) are very adamant that you should use the standard display

>>>settings for your monitor.

>>>

>>>They have done something to the monitor functions in Windows 7 because

>>>much

>>>software does not work even if one just chooses to up the screen text

>>>size

>>>by clicking on preferences. So that, coupled with the urging to use the

>>>monitor's native settings seems to me to mean that they know it does not

>>>work as flexibly as previous versions. (I know nothing of Vista as I

>>>missed

>>>it out).

>>>

>>>Just in case you have not done this, type msinfo32 into the search

>>>programs

>>>and files box on the Start menu. That will give a list of IRQ numbers -

>>>mine are all the usual little ones except for three labelled hub.

>>

>>

>> Thanks for your help. I'll have to live with the 1680x1050 resolution

>> until ATI or somebody fixes this. I set W7 to used the Medium screen

>> sizing option so most things are resized bigger but I see some stuff

>> just doesn't resize and work properly. My interrupt table says the

>> video card is using IRQ 4294967294 which sounds like some sort of

>> simulated interrupt. I seem to remember that when XP first came out I

>> had similar problems with an older ATI card and was only able to solve

>> them by installing XP for a generic computer using the F5 option. I

>> don't remember if I did this the last time I reinstalled XP or if ATI

>> fixed the drivers. I've sent a report to ATI about this so maybe

>> they'll fix it soon. Thanks again.

>

> The IRQ on my notebook with the ATI Mobility Radeon HD2600 PCIe is the

> same as yours, with my Intel wireless adapter being one less. Things that

> make you go "Huh!"

> One thing I found in your manual is that 1280x800 is not a native preset

> for that monitor, so that may be part of the problem. One thing you might

> try if you have the hardware is to change the way you're connected. For

> example, if you currently have it connected via the DVI port, try

> connecting it to the D-sub port. If you're video card doesn't have a D-sub

> out, you could try a DVI-to-DSUB adaptor.

> Since there is no monitor driver for Win7, you can right-click the setup

> file you have (which is probably for Vista?) and select Properties,

> Compatibility, check the box next to "Run this program in compatibility

> mode for:" and pick Vista Service Pack 2. Win7 should then show the

> monitor as what it is. This link is for the driver through Vista:

> http://www.samsung.com/us/support/d...cd=&prd_mdl_name=T220HD&prd_ia_sub_class_cd=P

> They haven't released one for Win7 and probably won't if they haven't by

> now.

> --

> SC Tom

>

>

That should be "your video card" instead of "you're"

--

SC Tom

 

[a@b.c]

On Wed, 21 Apr 2010 09:46:12 -0400, "SC Tom" wrote:



>

> wrote in message news:l5tss51oq0iar37au5efvagu5mam0f92qh@4ax.com...

>> On Tue, 20 Apr 2010 19:53:29 +0100, "johnbee"

>> wrote:

>>

>>>

>>> wrote in message

>>>news:iihqs5p3rcoc8j4ebmrjn8e3ohftebr90n@4ax.com...

>>>> I am using an XFX video card based on the ATI 5450 chip. I like to use

>>>> the 1280x800 resolution. This works fine in Windows XP with my

>>>> Samsung T220 monitor.

>>>>

>>>> But with Windows 7 it does not display properly. The monitor is

>>>> getting a signal which says there are 960 vertical lines rather than

>>>> the 800 vertical lines Windows is set for. So the image is compressed

>>>> vertically and there's black space at the top and bottom since there

>>>> are only 800 lines in the image and the monitor thinks there should be

>>>> 960. This is with ATI's latest 10.3 drivers.

>>>>

>>>> In XP the display adapter uses interrupt 16 but with W7 is uses some

>>>> sort of simulated interrupt with a strange long number.

>>>>

>>>> Is there a way I can change W7 to use interrupt 16 for the video card?

>>>>

>>>> Also I remember that in XP you could press F5 during installation and

>>>> get an option to install without interrupt sharing. Is there

>>>> something similar in W7 and should I try a re-install?

>>>>

>>>> THANKS IN ADVANCE.

>>>>

>>>

>>>I will say something in case nobody knows the exact answers to what you

>>>ask.

>>>The Windows 7 documentation, help system, and all the books I have read

>>>(well, both of them, The Windows Bible and the Administrator's Pocket

>>>Consultant) are very adamant that you should use the standard display

>>>settings for your monitor.

>>>

>>>They have done something to the monitor functions in Windows 7 because

>>>much

>>>software does not work even if one just chooses to up the screen text size

>>>by clicking on preferences. So that, coupled with the urging to use the

>>>monitor's native settings seems to me to mean that they know it does not

>>>work as flexibly as previous versions. (I know nothing of Vista as I

>>>missed

>>>it out).

>>>

>>>Just in case you have not done this, type msinfo32 into the search

>>>programs

>>>and files box on the Start menu. That will give a list of IRQ numbers -

>>>mine are all the usual little ones except for three labelled hub.

>>

>>

>> Thanks for your help. I'll have to live with the 1680x1050 resolution

>> until ATI or somebody fixes this. I set W7 to used the Medium screen

>> sizing option so most things are resized bigger but I see some stuff

>> just doesn't resize and work properly. My interrupt table says the

>> video card is using IRQ 4294967294 which sounds like some sort of

>> simulated interrupt. I seem to remember that when XP first came out I

>> had similar problems with an older ATI card and was only able to solve

>> them by installing XP for a generic computer using the F5 option. I

>> don't remember if I did this the last time I reinstalled XP or if ATI

>> fixed the drivers. I've sent a report to ATI about this so maybe

>> they'll fix it soon. Thanks again.

>

>The IRQ on my notebook with the ATI Mobility Radeon HD2600 PCIe is the same

>as yours, with my Intel wireless adapter being one less. Things that make

>you go "Huh!"

>One thing I found in your manual is that 1280x800 is not a native preset for

>that monitor, so that may be part of the problem. One thing you might try if

>you have the hardware is to change the way you're connected. For example, if

>you currently have it connected via the DVI port, try connecting it to the

>D-sub port. If you're video card doesn't have a D-sub out, you could try a

>DVI-to-DSUB adaptor.

>Since there is no monitor driver for Win7, you can right-click the setup

>file you have (which is probably for Vista?) and select Properties,

>Compatibility, check the box next to "Run this program in compatibility mode

>for:" and pick Vista Service Pack 2. Win7 should then show the monitor as

>what it is. This link is for the driver through Vista:

>http://www.samsung.com/us/support/d...cd=&prd_mdl_name=T220HD&prd_ia_sub_class_cd=P

>They haven't released one for Win7 and probably won't if they haven't by

>now.





I'll probably have to wait until the ATI W7 drivers mature. The whole

point is that this works fine with XP.

 

[SC Tom]

wrote in message news:b9bus5h542rgdtsbp47otsc6lfmke4msej@4ax.com...

> On Wed, 21 Apr 2010 09:46:12 -0400, "SC Tom" wrote:

>

>>

>> wrote in message

>>news:l5tss51oq0iar37au5efvagu5mam0f92qh@4ax.com...

>>> On Tue, 20 Apr 2010 19:53:29 +0100, "johnbee"

>>> wrote:

>>>

>>>>

>>>> wrote in message

>>>>news:iihqs5p3rcoc8j4ebmrjn8e3ohftebr90n@4ax.com...

>>>>> I am using an XFX video card based on the ATI 5450 chip. I like to use

>>>>> the 1280x800 resolution. This works fine in Windows XP with my

>>>>> Samsung T220 monitor.

>>>>>

>>>>> But with Windows 7 it does not display properly. The monitor is

>>>>> getting a signal which says there are 960 vertical lines rather than

>>>>> the 800 vertical lines Windows is set for. So the image is compressed

>>>>> vertically and there's black space at the top and bottom since there

>>>>> are only 800 lines in the image and the monitor thinks there should be

>>>>> 960. This is with ATI's latest 10.3 drivers.

>>>>>

>>>>> In XP the display adapter uses interrupt 16 but with W7 is uses some

>>>>> sort of simulated interrupt with a strange long number.

>>>>>

>>>>> Is there a way I can change W7 to use interrupt 16 for the video card?

>>>>>

>>>>> Also I remember that in XP you could press F5 during installation and

>>>>> get an option to install without interrupt sharing. Is there

>>>>> something similar in W7 and should I try a re-install?

>>>>>

>>>>> THANKS IN ADVANCE.

>>>>>

>>>>

>>>>I will say something in case nobody knows the exact answers to what you

>>>>ask.

>>>>The Windows 7 documentation, help system, and all the books I have read

>>>>(well, both of them, The Windows Bible and the Administrator's Pocket

>>>>Consultant) are very adamant that you should use the standard display

>>>>settings for your monitor.

>>>>

>>>>They have done something to the monitor functions in Windows 7 because

>>>>much

>>>>software does not work even if one just chooses to up the screen text

>>>>size

>>>>by clicking on preferences. So that, coupled with the urging to use the

>>>>monitor's native settings seems to me to mean that they know it does not

>>>>work as flexibly as previous versions. (I know nothing of Vista as I

>>>>missed

>>>>it out).

>>>>

>>>>Just in case you have not done this, type msinfo32 into the search

>>>>programs

>>>>and files box on the Start menu. That will give a list of IRQ numbers -

>>>>mine are all the usual little ones except for three labelled hub.

>>>

>>>

>>> Thanks for your help. I'll have to live with the 1680x1050 resolution

>>> until ATI or somebody fixes this. I set W7 to used the Medium screen

>>> sizing option so most things are resized bigger but I see some stuff

>>> just doesn't resize and work properly. My interrupt table says the

>>> video card is using IRQ 4294967294 which sounds like some sort of

>>> simulated interrupt. I seem to remember that when XP first came out I

>>> had similar problems with an older ATI card and was only able to solve

>>> them by installing XP for a generic computer using the F5 option. I

>>> don't remember if I did this the last time I reinstalled XP or if ATI

>>> fixed the drivers. I've sent a report to ATI about this so maybe

>>> they'll fix it soon. Thanks again.

>>

>>The IRQ on my notebook with the ATI Mobility Radeon HD2600 PCIe is the

>>same

>>as yours, with my Intel wireless adapter being one less. Things that make

>>you go "Huh!"

>>One thing I found in your manual is that 1280x800 is not a native preset

>>for

>>that monitor, so that may be part of the problem. One thing you might try

>>if

>>you have the hardware is to change the way you're connected. For example,

>>if

>>you currently have it connected via the DVI port, try connecting it to the

>>D-sub port. If you're video card doesn't have a D-sub out, you could try a

>>DVI-to-DSUB adaptor.

>>Since there is no monitor driver for Win7, you can right-click the setup

>>file you have (which is probably for Vista?) and select Properties,

>>Compatibility, check the box next to "Run this program in compatibility

>>mode

>>for:" and pick Vista Service Pack 2. Win7 should then show the monitor as

>>what it is. This link is for the driver through Vista:

>>http://www.samsung.com/us/support/d...cd=&prd_mdl_name=T220HD&prd_ia_sub_class_cd=P

>>They haven't released one for Win7 and probably won't if they haven't by

>>now.

>

>

> I'll probably have to wait until the ATI W7 drivers mature. The whole

> point is that this works fine with XP.

>



And part of the reason it worked with XP is that the proper monitor driver

was installed. Unfortunately, there probably won't be one forthcoming from

Samsung.

--

SC Tom