subject:"Re\: screen"


On 2022-01-28 16:53, Andrew M.A. Cater wrote:


Wherever possible, it's easier if you are using Debian stable: more people
will hae experience / be running that at any one time.

All the very best, as ever,

Andy Cater


I know. But testing is more convenient for me. I need to test current 
software for the courseware I write. Stable is perfectly fine, but not 
if you want to trail the leading edge a bit more closely. Sid is to 
close to the edge for me though.


I've been running testing for close to 25 years now. In the early days 
breakage was a recurring thing, but nowadays that is quite rare. Up to 
now I've always been able to solve any trouble. My time as a sysadmin 
still proves to be useful when I need to do that.  ;-)


Grx HdV

Re: Screen goes blank for 1-2 seconds


On 2022-01-28 16:48, Bijan Soleymani wrote:

On 2022-01-28 10:16, hdv@gmail wrote:
About the fan: I seem to remember I had to install amdgpu-fan (needed 
to look that up, forgot the name) when I got this setup. Not sure if 
it still is needed or that the driver can control the fan reliably 
nowadays. I need to check that out too when I get home. 


I've had my card since January 2020 and have not needed amdgpu-fan or 
similar software, and it has just worked with default settings from 
kernel drivers.


I would check amdgpu-fan settings to adjust more aggressively or maybe 
uninstall and try settings fan to max and see if that solves the issue.


I'll keep that in mind. Thanks!

P.S. Apologies for the PM. I accidentally used the wrong shortcut.

Grx HdV

Re: Screen goes blank for 1-2 seconds

2022-01-28 Thread Andrew M.A. Cater

On Fri, Jan 28, 2022 at 04:16:19PM +0100, hdv@gmail wrote:
> On 2022-01-28 15:31, Bijan Soleymani wrote:
> > On 2022-01-28 08:40, hdv@gmail wrote:
> > > I am reasonably sure the problem lies in some form or combination of
> > > software. Sadly, my expertise in that area is insufficient to find
> > > out what it is exactly.
> > 
> > What kernel/OS/driver are you using if it is software I can try to
> > reproduce since I have a pretty similar card.
> > 
> > Also you can max out the fan to see if that helps:
> > 
> > echo 0 > /sys/class/drm/card0/device/hwmon/hwmon0/pwm1_enable
> > 
> > (If you can pwm1_enable after it will show 1 and not 0, but if you look
> > at pwm1 it will be at max of 255).
> > 
> > Bijan
> > 
> 
> I am (currently) on
> 
> 5.15.0-2-amd64 #1 SMP Debian 5.15.5-2 (2021-12-18) x86_64 GNU/Linux
> 
> and
> 
> xserver-xorg-video-amdgpu
> 
> if I am not mistaken. Sorry, I can't check it from here.
> 

So - Bookworm / Debian testing?

Are you able to reproduce this on Debian stable and kernel 5.10?

> 
> Grx HdV
>

Wherever possible, it's easier if you are using Debian stable: more people
will hae experience / be running that at any one time.

All the very best, as ever,

Andy Cater

Re: Screen goes blank for 1-2 seconds

2022-01-28 Thread Bijan Soleymani


On 2022-01-28 10:16, hdv@gmail wrote:
About the fan: I seem to remember I had to install amdgpu-fan (needed 
to look that up, forgot the name) when I got this setup. Not sure if 
it still is needed or that the driver can control the fan reliably 
nowadays. I need to check that out too when I get home. 


I've had my card since January 2020 and have not needed amdgpu-fan or 
similar software, and it has just worked with default settings from 
kernel drivers.


I would check amdgpu-fan settings to adjust more aggressively or maybe 
uninstall and try settings fan to max and see if that solves the issue.


Bijan

Re: Screen goes blank for 1-2 seconds


On 2022-01-28 15:31, Bijan Soleymani wrote:

On 2022-01-28 08:40, hdv@gmail wrote:
I am reasonably sure the problem lies in some form or combination of 
software. Sadly, my expertise in that area is insufficient to find out 
what it is exactly.


What kernel/OS/driver are you using if it is software I can try to 
reproduce since I have a pretty similar card.


On the other hand: what goes in my case is not necessarily valid in 
yours.


In case it is is due to overheating this script will log temperature, 
power management and fan settings.


#!/bin/bash
cd /sys/class/drm/card0/device/hwmon/hwmon0
while `true`;
     do date;
     for x in fan1_enable fan1_input fan1_target pwm1 pwm1_enable 
temp1_input;

     do echo -n "$x: "; cat $x;
     done;
     echo; sleep 1;
done

Output will be the following about once a second:

Fri 28 Jan 2022 09:28:12 AM EST
fan1_enable: 0
fan1_input: 1714
fan1_target: 1714
pwm1: 0
pwm1_enable: 2
temp1_input: 36000

Also you can max out the fan to see if that helps:

echo 0 > /sys/class/drm/card0/device/hwmon/hwmon0/pwm1_enable

(If you can pwm1_enable after it will show 1 and not 0, but if you look 
at pwm1 it will be at max of 255).


Bijan



I am (currently) on

5.15.0-2-amd64 #1 SMP Debian 5.15.5-2 (2021-12-18) x86_64 GNU/Linux

and

xserver-xorg-video-amdgpu

if I am not mistaken. Sorry, I can't check it from here.

About the fan: I seem to remember I had to install amdgpu-fan (needed to 
look that up, forgot the name) when I got this setup. Not sure if it 
still is needed or that the driver can control the fan reliably 
nowadays. I need to check that out too when I get home.


Grx HdV

Re: Screen goes blank for 1-2 seconds

2022-01-28 Thread Bijan Soleymani


On 2022-01-28 08:40, hdv@gmail wrote:
I am reasonably sure the problem lies in some form or combination of 
software. Sadly, my expertise in that area is insufficient to find out 
what it is exactly.


What kernel/OS/driver are you using if it is software I can try to 
reproduce since I have a pretty similar card.


On the other hand: what goes in my case is not necessarily valid in 
yours.


In case it is is due to overheating this script will log temperature, 
power management and fan settings.


#!/bin/bash
cd /sys/class/drm/card0/device/hwmon/hwmon0
while `true`;
    do date;
    for x in fan1_enable fan1_input fan1_target pwm1 pwm1_enable 
temp1_input;

    do echo -n "$x: "; cat $x;
    done;
    echo; sleep 1;
done

Output will be the following about once a second:

Fri 28 Jan 2022 09:28:12 AM EST
fan1_enable: 0
fan1_input: 1714
fan1_target: 1714
pwm1: 0
pwm1_enable: 2
temp1_input: 36000

Also you can max out the fan to see if that helps:

echo 0 > /sys/class/drm/card0/device/hwmon/hwmon0/pwm1_enable

(If you can pwm1_enable after it will show 1 and not 0, but if you look 
at pwm1 it will be at max of 255).


Bijan

Re: Screen goes blank for 1-2 seconds


On 2022-01-28 14:12, Pankaj Jangid wrote:

Pankaj Jangid  writes:


UPDATE:

I have changed the HDMI cable and since last 6hrs I have not faced that
event again. Will update in the thread if it re-appears.

Another thing happened when I was replacing the cable. I heard the
sparking noise in the power socket of monitor. So I tightened it up a
bit. So the loose power socket could also be the culprit in my case.

I am just waiting for another day and then I’ll try the earlier HDMI
cable again.


Nope. The problem still exists. I’ll change the power-chord now.



Like I wrote before: I exchanged all non-fixed components (mainly cable, 
ports, display, and slot on the mobo). Where that was not possible I 
made double-sure there was no mechanical source to the problems (bad 
cables, bad seating, corrosion, etc.). The only thing I did not change 
was the combination of the mobo and the graphics card. Maybe/probably I 
did not exclude the power component as a source. I can't remember 
whether I did or not.


I am reasonably sure the problem lies in some form or combination of 
software. Sadly, my expertise in that area is insufficient to find out 
what it is exactly.


On the other hand: what goes in my case is not necessarily valid in yours.

Grx HdV

Re: Screen goes blank for 1-2 seconds

2022-01-28 Thread Pankaj Jangid

Pankaj Jangid  writes:

> UPDATE:
>
> I have changed the HDMI cable and since last 6hrs I have not faced that
> event again. Will update in the thread if it re-appears.
>
> Another thing happened when I was replacing the cable. I heard the
> sparking noise in the power socket of monitor. So I tightened it up a
> bit. So the loose power socket could also be the culprit in my case.
>
> I am just waiting for another day and then I’ll try the earlier HDMI
> cable again.

Nope. The problem still exists. I’ll change the power-chord now.

Re: Screen goes blank for 1-2 seconds

Pankaj Jangid  writes:

> Dan Ritter  writes:
>
>> Pankaj Jangid wrote: 
>>> Since I have setup a new hardware - x570 chipset, rx570 GPU - I am
>>> facing a very strange problem. The monitor goes blank for a brief time,
>>> like 1-2s and then comes back. It is connected with the GPU using HDMI
>>> cable.
>>
>> I have seen this happen with loose or worn-out video cables. 
>
> Sure. Let me try another cable for a day. I’ll update here.

UPDATE:

I have changed the HDMI cable and since last 6hrs I have not faced that
event again. Will update in the thread if it re-appears.

Another thing happened when I was replacing the cable. I heard the
sparking noise in the power socket of monitor. So I tightened it up a
bit. So the loose power socket could also be the culprit in my case.

I am just waiting for another day and then I’ll try the earlier HDMI
cable again.

Re: Screen goes blank for 1-2 seconds


On 2022-01-27 5:30 a.m., hdv@gmail wrote:


Sadly I do not have access to this machine remotely. I do have my own 
VPN server, but that does not help when the machine in question is 
turned off. ;-)


I'll check the temperature when I am back, and when it happens again.


I played around a tiny bit.

My GPU temperature when logged in remotely via VNC was 29C.

Logging in on local system GPU went up to high 30s just on the desktop.

I ran a game and initially the temperature went.

pwm1 (the power management state) was 0 (off) until 53C when it got set 
to 43.


Temperature went up to 62C, and then dropped to 45C, and then pwm1 went 
back to 0.


Temp went back to 53C before the power management kicked in again.

I did:
echo 0 > pwm1_enable

Which apparently maxes the power management as:
pwm1 was now 255

Then I did:
echo 1 > pwm1_enable

This seemed more aggressive than the default setting of 2 on my system.

Looking at the kernel docs:
https://www.kernel.org/doc/Documentation/hwmon/g762

It seems 1 setting is open mode and 2 is closed mode.

In closed mode it seems there is some feedback mechanism involving the 
fan speed.


Undocumented but it seems setting pwm1_enable to 0, just maxes the power 
management out.


Turns out it is documented in the kernel source comments:
 *  0 : no fan speed control (i.e. fan at full speed)
 *  1 : manual fan speed control enabled (use pwm[1-*]) (open-loop)
 *  2+: automatic fan speed control enabled (use fan[1-*]_target) 
(closed-loop)


Anyways with all this playing around I got my temp down to 21C, when 
logged in locally but not running the game.


tl;dr

If anyone has this happen quickly enough you could try setting fan speed 
to max (echo 0 > pwm1_enable and check that pwm1 goes to 255) and see if 
it fixes it.


Bijan

Re: Screen goes blank for 1-2 seconds

Tim Woodall  writes:

> For a while I was using a mac (running macOS) plugged into a dock with
> two HDMI screens connected and I was having this problem occasionally.
> The mac was clearly thinking the screens had "gone away" because it
> would move windows around. I've now switched to a windows laptop, same
> dock, same cables, same monitors and the problem has gone away.

So this may be a driver issue in macOS and Linux kernel.

Re: Screen goes blank for 1-2 seconds

Vincent Lefevre  writes:

> So it could be a hardware problem, with this monitor or something
> else, possibly specific to HDMI.
>
> I suggest that you try with another machine, another cable, etc. if
> possible. Or the same machine with another monitor.

I have multiple cables and an extra laptop. Let me try as many
combinations as possible. And report here.

>
> You might get messages in the /var/log/Xorg.0.log file if you're using X.
>

Where are the Wayland logs? I have a freshly installed Debian 11 and
default is Wayland.

> And I had noted that plugging out then in again the HDMI cable on the
> monitor side was generally making the problem disappear for some time.

The problem timing is very random so I am not sure if I can diagnose
anything by changing ports.

Re: Screen goes blank for 1-2 seconds

"hdv@gmail"  writes:

> You are not the only one. I see the exact same here. The system this
> happens on has an RX560 graphics card. I have been seeing these
> blackouts from the start on this configuration (more than 2 years
> now).
>
> I can confirm it is not a mechanical issue (not of cable's
> connections, cable defects, or of the seating of the card in the
> motherboard). It is not the display either (I have tried multiple
> displays). I am almost sure it is a software issue.
>
> I can also confirm the system does not hang. I've tested this with a
> software timer and a request/response loop querying a daemon both
> locally and over a wired network.

Thanks for confirming.

Slight variation though. I have x570 chipset and RX580 GPU. I wrongly
typed RX570 GPU in the original email. But I guess the driver is same
for the family.

Re: Screen goes blank for 1-2 seconds

Dan Ritter  writes:

> Pankaj Jangid wrote: 
>> Since I have setup a new hardware - x570 chipset, rx570 GPU - I am
>> facing a very strange problem. The monitor goes blank for a brief time,
>> like 1-2s and then comes back. It is connected with the GPU using HDMI
>> cable.
>> 
>> During that 1-2s, the machine response is fine. Whatever I type during
>> that time goes there as input, and visible when the monitor comes back.
>
> I have seen this happen with loose or worn-out video cables. 

Sure. Let me try another cable for a day. I’ll update here.

Re: Screen goes blank for 1-2 seconds

Bijan Soleymani  writes:

> On 2022-01-26 11:35 p.m., Pankaj Jangid wrote> I don’t want to file
> any bug report till I have some concrete data. So
>> my question is - how do I diagnose such an issue and produce some data
>> for debugging. So that I can hand it over to maintainers.
>
> This one line script will sleep for 0.01 seconds at a time and then
> print the current time in milliseconds to a file.
>
> 

Thanks. I’ll use the script.

Re: Screen goes blank for 1-2 seconds

David Wright  writes:

> On Thu 27 Jan 2022 at 10:05:16 (+0530), Pankaj Jangid wrote:
>> Since I have setup a new hardware - x570 chipset, rx570 GPU - I am
>> facing a very strange problem. The monitor goes blank for a brief time,
>> like 1-2s and then comes back. It is connected with the GPU using HDMI
>> cable.
>
> Can you provoke the same symptom by wiggling the HDMI plug in the
> socket (at either end, but more likely at the computer end)?
> These connectors can be unreliable.

No. This is not happening. In fact I have two GPUs and in total 4 HDMI
ports. In all of them, same symptoms. It happens twice or thrice a day
but sometimes more frequently.

This could be cable problem as pointed out by Dan Ritter. Trying a
different cable for a day.

Re: Screen goes blank for 1-2 seconds

2022-01-27 Thread Dan Ritter

Pankaj Jangid wrote: 
> Since I have setup a new hardware - x570 chipset, rx570 GPU - I am
> facing a very strange problem. The monitor goes blank for a brief time,
> like 1-2s and then comes back. It is connected with the GPU using HDMI
> cable.
> 
> During that 1-2s, the machine response is fine. Whatever I type during
> that time goes there as input, and visible when the monitor comes back.

I have seen this happen with loose or worn-out video cables. 

-dsr-

Re: Screen goes blank for 1-2 seconds

2022-01-27 Thread Tim Woodall


On Thu, 27 Jan 2022, Vincent Lefevre wrote:


On 2022-01-27 11:41:44 +0100, Vincent Lefevre wrote:

On 2022-01-27 10:05:16 +0530, Pankaj Jangid wrote:

Since I have setup a new hardware - x570 chipset, rx570 GPU - I am
facing a very strange problem. The monitor goes blank for a brief time,
like 1-2s and then comes back. It is connected with the GPU using HDMI
cable.


I had a similar problem in 2009 with a monitor connected via HDMI to
a Power Mac (not under Linux). This first happened from time to time,
then much more often, i.e. every day. IIRC, there was no issue when
later, this monitor was connected to a Debian laptop via VGA. I sold
the monitor to someone else (and told him about this problem), and he
confirmed the problem with his machine.


And I had noted that plugging out then in again the HDMI cable on the
monitor side was generally making the problem disappear for some time.



For a while I was using a mac (running macOS) plugged into a dock with
two HDMI screens connected and I was having this problem occasionally.
The mac was clearly thinking the screens had "gone away" because it
would move windows around. I've now switched to a windows laptop, same
dock, same cables, same monitors and the problem has gone away.

Re: Screen goes blank for 1-2 seconds

2022-01-27 Thread Vincent Lefevre

On 2022-01-27 11:41:44 +0100, Vincent Lefevre wrote:
> On 2022-01-27 10:05:16 +0530, Pankaj Jangid wrote:
> > Since I have setup a new hardware - x570 chipset, rx570 GPU - I am
> > facing a very strange problem. The monitor goes blank for a brief time,
> > like 1-2s and then comes back. It is connected with the GPU using HDMI
> > cable.
> 
> I had a similar problem in 2009 with a monitor connected via HDMI to
> a Power Mac (not under Linux). This first happened from time to time,
> then much more often, i.e. every day. IIRC, there was no issue when
> later, this monitor was connected to a Debian laptop via VGA. I sold
> the monitor to someone else (and told him about this problem), and he
> confirmed the problem with his machine.

And I had noted that plugging out then in again the HDMI cable on the
monitor side was generally making the problem disappear for some time.

-- 
Vincent Lefèvre  - Web: 
100% accessible validated (X)HTML - Blog: 
Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)

Re: Screen goes blank for 1-2 seconds

2022-01-27 Thread Vincent Lefevre

On 2022-01-27 10:05:16 +0530, Pankaj Jangid wrote:
> Since I have setup a new hardware - x570 chipset, rx570 GPU - I am
> facing a very strange problem. The monitor goes blank for a brief time,
> like 1-2s and then comes back. It is connected with the GPU using HDMI
> cable.

I had a similar problem in 2009 with a monitor connected via HDMI to
a Power Mac (not under Linux). This first happened from time to time,
then much more often, i.e. every day. IIRC, there was no issue when
later, this monitor was connected to a Debian laptop via VGA. I sold
the monitor to someone else (and told him about this problem), and he
confirmed the problem with his machine.

So it could be a hardware problem, with this monitor or something
else, possibly specific to HDMI.

I suggest that you try with another machine, another cable, etc. if
possible. Or the same machine with another monitor.

> During that 1-2s, the machine response is fine. Whatever I type during
> that time goes there as input, and visible when the monitor comes back.
> 
> I don’t want to file any bug report till I have some concrete data. So
> my question is - how do I diagnose such an issue and produce some data
> for debugging. So that I can hand it over to maintainers.

You might get messages in the /var/log/Xorg.0.log file if you're using X.

BTW, with my setup, I regularly get disconnected/connected messages
with 1-2 seconds delay, such as:

[166285.233] (--) NVIDIA(GPU-0): DFP-4: disconnected
[166285.233] (--) NVIDIA(GPU-0): DFP-4: Internal DisplayPort
[166285.233] (--) NVIDIA(GPU-0): DFP-4: 960.0 MHz maximum pixel clock
[166285.233] (--) NVIDIA(GPU-0): 
[166286.614] (--) NVIDIA(GPU-0): Samsung U32J59x (DFP-4): connected
[166286.614] (--) NVIDIA(GPU-0): Samsung U32J59x (DFP-4): Internal DisplayPort
[166286.614] (--) NVIDIA(GPU-0): Samsung U32J59x (DFP-4): 960.0 MHz maximum 
pixel clock
[166286.614] (--) NVIDIA(GPU-0): 

I have 2 external monitors, this one connected via HDMI and another
one connected via DisplayPort (no messages in Xorg.0.log for this
other monitor). But I have never noticed any blank time with either
monitor. That's strange.

-- 
Vincent Lefèvre  - Web: 
100% accessible validated (X)HTML - Blog: 
Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)

Re: Screen goes blank for 1-2 seconds

2022-01-27 Thread hdv@gmail


On 2022-01-27 11:16, Bijan Soleymani wrote:

On 2022-01-27 5:00 a.m., hdv@gmail wrote:
My guess is about once every week. The display is on for roughly 16 
hours each day. There seems to be no discernable relation to "load". 
At least not that I could confirm. I haven't found a link to a 
specific application either. This system is a general purpose 
workstation and it is exposed to most common types of use. I design 
and create courseware, which involves running virtual machines with 
libvirt, coding in several languages, video editing, graphics editing, 
sound editing, editing all kinds of documents, and the standard 
internet stuff. I haven't seen this happening more often with any of 
these uses.


Thanks for the reply!

This blog post seems to indicate it might be due to the fan not turning 
on enough at moderate load by default (it pulses off and on which is not 
enough):

https://zarino.co.uk/post/amp-gpu-fan-curve-pop-os-ubuntu/

cat /sys/class/drm/card0/device/hwmon/hwmon0/temp1_input

Should give temperature:
Mine right now is:
29000

which apparently is 29C.

/sys/class/drm/card0/device/hwmon/hwmon0/pwm1

is the power management.

I'll play around tomorrow.

Bijan


Sadly I do not have access to this machine remotely. I do have my own 
VPN server, but that does not help when the machine in question is 
turned off.  ;-)


I'll check the temperature when I am back, and when it happens again.

Grx HdV

Re: Screen goes blank for 1-2 seconds


On 2022-01-27 5:00 a.m., hdv@gmail wrote:
My guess is about once every week. The display is on for roughly 16 
hours each day. There seems to be no discernable relation to "load". At 
least not that I could confirm. I haven't found a link to a specific 
application either. This system is a general purpose workstation and it 
is exposed to most common types of use. I design and create courseware, 
which involves running virtual machines with libvirt, coding in several 
languages, video editing, graphics editing, sound editing, editing all 
kinds of documents, and the standard internet stuff. I haven't seen this 
happening more often with any of these uses.


Thanks for the reply!

This blog post seems to indicate it might be due to the fan not turning 
on enough at moderate load by default (it pulses off and on which is not 
enough):

https://zarino.co.uk/post/amp-gpu-fan-curve-pop-os-ubuntu/

cat /sys/class/drm/card0/device/hwmon/hwmon0/temp1_input

Should give temperature:
Mine right now is:
29000

which apparently is 29C.

/sys/class/drm/card0/device/hwmon/hwmon0/pwm1

is the power management.

I'll play around tomorrow.

Bijan

Re: Screen goes blank for 1-2 seconds

2022-01-27 Thread hdv@gmail

On 2022-01-27 10:40, Bijan Soleymani wrote:

On 2022-01-27 4:23 a.m., Bijan Soleymani wrote:
Are you also connected via HDMI? I think I am using DVI to mini
display port.

I will have to check when I return home from this assignment in 2 weeks
time, but I am almost certain I am using DP. I seem to remember I didn't
have the appropriate HDMI cable at hand for the resolution I am using
(3840x2160@60Hz).

Seems the issues happens on windows and on HDMI but not DP:
https://www.reddit.com/r/AMDHelp/comments/ez2c4i/rx_570_screen_randomly_goes_black_during/

I will check if my wet memory is corrupt as soon as I can. Who knows?
Maybe I am using HDMI after all.

Two other cases:
https://www.reddit.com/r/AMDHelp/comments/o1r0y9/screen_goes_to_black_randomly_while_gaming_rx_570/

That one says upgrading the power supply fixed it.

https://forums.tomshardware.com/threads/screen-goes-black-for-3-5-seconds-then-goes-back.3397019/

This one said they had the card replaced.

Anyways I will test with HDMI tomorrow.

Let me know how often it happens, or if there is anything that can be
done to trigger it.

My guess is about once every week. The display is on for roughly 16
hours each day. There seems to be no discernable relation to "load". At
least not that I could confirm. I haven't found a link to a specific
application either. This system is a general purpose workstation and it
is exposed to most common types of use. I design and create courseware,
which involves running virtual machines with libvirt, coding in several
languages, video editing, graphics editing, sound editing, editing all
kinds of documents, and the standard internet stuff. I haven't seen this
happening more often with any of these uses.

Grx HdV

Re: Screen goes blank for 1-2 seconds




On 2022-01-27 4:23 a.m., Bijan Soleymani wrote:
Are you also connected via HDMI? I think I am using DVI to mini display 
port.


Seems the issues happens on windows and on HDMI but not DP:
https://www.reddit.com/r/AMDHelp/comments/ez2c4i/rx_570_screen_randomly_goes_black_during/

Two other cases:
https://www.reddit.com/r/AMDHelp/comments/o1r0y9/screen_goes_to_black_randomly_while_gaming_rx_570/

That one says upgrading the power supply fixed it.

https://forums.tomshardware.com/threads/screen-goes-black-for-3-5-seconds-then-goes-back.3397019/

This one said they had the card replaced.

Anyways I will test with HDMI tomorrow.

Let me know how often it happens, or if there is anything that can be 
done to trigger it.


Bijan

Re: Screen goes blank for 1-2 seconds