NVidia OpenGL display driver lost connection error troubleshooting

In recent operating systems and more recent games you may have encountered the following message every now and then.

Sometimes the message won’t show at all depending on your windows settings and or game.

“The NVIDIA OpenGL driver lost connection with the display driver due to exceeding the Windows Time-Out limit and is unable to continue. The application must now close.
Error code: 7″


This is actually a good thing which prevents freezes of your whole operating system. In some cases however we want to workaround it by increasing the time before timeout. You can read more about this on Microsoft Support.

We do this by editing a key in the windows registry. For example I have to change this to 8 seconds or so in order to take high resolution screenshots in SpaceEngine.

Warning! Before proceeding you should know that setting this to a bad value could mess up things on your computer. Create a system restore point and backup your data!

NOTE! This affects all graphics programs and games on your computer. I recommend restoring the value after you’re done testing.

Proceed on your own risk!

Option 1: Right and select save as on any of the registry patches. Double click on them in explorer to install

TdrDelay-8sec.reg – TdrDelay set to 8 seconds (this should be enough for SpaceEngine)
TdrDelay-32sec.reg – TdrDelay set to 32 seconds (try this if error still shows)
TdrDelay-uninstall.reg – This removes the registry value which will use windows default. (Windows default is 2 seconds)

Option 2: Manually edit the registry

Open regedit.exe and navigate to:

Create a new key DWORD32 and name it exactly TdrDelay
I tried 64 but it wouldn’t work for me even though I use a 64 bit OS.
Remember that this key name is cAsE sEnSiTiVe.

Double click on the key, choose decimal value and set it to the delay that you want.
I recommend trying 8 to 32. Delete the key when you’re done.

Here is a tiny gif animation. Please excuse the Swedish 🙂


If you have any additional information to add or if I got anything wrong, please don’t hesitate to leave a comment!

Robocopy sync multiple folders – to one location – batch script

From Wikipedia:

Robocopy, or “Robust File Copy“, is a command-line directory and/or file replication command. Robocopy functionally replaces Xcopy, with more options. It has been available as part of the Windows Resource Kit starting with Windows NT 4.0, and was first introduced as a standard feature in Windows Vista and Windows Server 2008.

This makes it a very useful simple syncing tool. The following is the script that I use to sync my laptop documents when I’m leaving the office. There are a lot of applications and tools for this but sometimes you just want a portable script.

Please note that this is a one-direction sync. It will not change or remove anything from the source folder.



  1. Copy and paste the following batch (*.bat) script into your favourite text editor of choice or notepad. (Not Microsoft word) You can also download it directly from here or here mirror. (You might have to right click and select save destination as)
    @echo off
    CHCP 1252
    echo %~dp0
    ::Remove old log file
    if exist "%~dp0\robocopylog.txt" del "%~dp0\robocopylog.txt"
    ::Ignore the following file types. You can add more separated by space
    set exclude=*.bak *.backup
    ::Go through each line in the folders.txt file
    for /f "skip=2 delims=" %%f in ('find /v "" %~dp0\folders.txt') do (
      ::Check if the relative path from current directory works 
      if exist "%~dp0\%%f" (
        ::Sync relative path
    		robocopy "%%f" "%~dp0\%%f" /v /xf %exclude% /mir /tee /fft /log+:robocopylog.txt
    	) else (
    	::Sync absolute path if relative didnt work
    		robocopy "%%f" "%~dp0\%%~nf" /v /xf %exclude% /mir /tee /fft /log+:robocopylog.txt
    ::Wait for keyboard input before closing the window. Remove pause if you want it to close
  2. Save it where you want your backups to be stored (destination). Use whichever name you like. For example robocopy sync unicode folders.bat
  3. Create a new text file named folders.txt using any text editor and enter each folder that you want to make a backup off separated by a line break. (sources) Save the text file in the same folder as the batch script. Relative paths work too. Example:
  4. Run the script! The black window will stay open when it’s completed.
    With the above example the result would look something like this:


  • If source folders share the same name, they will be merged. Keep this in mind.
  • This is a one-direction only sync. It will not move or remove anything from the source folder.
  • If you don’t want the window to stay open when it’s complete remove the last line “pause” from the script.
  • A log file is saved for each operation in robocopylog.txt
  • You can add more files to exclude if you want, example: exclude=*.bak *.backup *.mp4 *.avi

Add scaled timestamps to photos using ImageMagick

Here is one way to add timestamps quickly to lots of photos using open source tools and a script.

The image editing is done using ImageMagick  convert.exe and identify.exe

ImageMagick is a free to use open source collection of command line tools for image editing, identifying, manipulation and much more.


This script will go through all JPG, JPEG, GIF and PNG files inside the current folder, make copies of them in a separate folder and add date and time saved (burned) into the image. The operation is lossy hence it only modifies copies of the files. Date and time is retrieved from the metadata tag Exif.Image.DateTimeOriginal. If the images lack this tag they will be stamped “No timestamp”.

The timestamp font size and placement on the photo will scale in percentage according to the width and resolution of the photo.

If you want to change colors or such you will need to edit the script manually. Here are some examples of photos I’ve taken with added timestamps:

If these kind of timestamps are good enough for you, you’ve found the right post!



Option a) – quick

1. Download the script (mirror) together with portable ImageMagick convert.exe and identify.exe
MD5: a5363bef4aafbe979dcac875f7f2e263

2. Extract all files in the folder where you keep the images that you wish to add timestamps to

3. Double click on add timestamps.bat to start the process.

A black window should pop up showing the image conversion process in ImageMagick.


4. When done you should see a folder named stamped with copies of the files with added timestamps!

Option b) – manual

1. Download ImageMagick from the windows portable edition here and place convert.exe and identify.exe in the same directory where you place the script. Alternately you can use the files supplied in the download above.

2. Copy and paste the code from below into your favorite plain text editor like notepad, notepad2 or notepad++

3. Save it with whichever name you prefer as long as you end the name with the file extension .bat for example add timestamps.bat

4. Double click on the bat file to start the process!

Batch script to copy and paste

@echo off & cls
rem enable variables referencing themselves inside loops
SetLocal EnableDelayedExpansion

rem optional settings
set fontcolor=#FFD800
set fontoutlinecolor=#000000
set fontstyle="Arial-Bold"

rem create a new folder where the stamped images will be placed
mkdir stamped

rem loop through all jpg png jpeg and gif files in the current folder
for /f "delims=" %%a in ('dir /b /A:-D /T:C "%cd%\*.jpg" "%cd%\*.png" "%cd%\*.jpeg" "%cd%\*.gif"') do (
	rem retrieve image date and time
	SetLocal EnableDelayedExpansion
	for /f "tokens=1-2" %%i in ('identify.exe -ping -format "%%w %%h" "%cd%\%%a"') do set W=%%i& set H=%%j

	rem retrieve image timestamp to perform size and distance calculations on
	SetLocal EnableDelayedExpansion
	for /f "tokens=1-2 delims=" %%k in ('identify -format "%%[EXIF:DateTimeOriginal]" "%cd%\%%a"') do set timestamp=%%k
	rem set timestamp to no timestamp if there is no timestamp
	if "!timestamp!" == "" (
		set timestamp=No timestamp
	rem print some information about the process
	echo %%a is !W! x !H! stamp !timestamp! ...

	rem set timestamp size to a fourth of the screen width
	set /A timestampsize = !W! / 3

	rem set timestamp offset distance from side of the screen
	set /A timestampoffset = !W! / 20

	rem set timestamp outline relative size
	set /A outlinewidth = !W! / 600

	rem echo !timestampsize! !timestampoffset!
	rem create a custom image with the timestamp with transparent background and combine it with the image
	convert.exe ^
	-verbose ^
	-background none^
	-stroke !fontoutlinecolor! ^
	-strokewidth !outlinewidth! ^
	-font !fontstyle! ^
	-fill !fontcolor! ^
	-size !timestampsize!x ^
	-gravity center label:"!timestamp!" "%cd%\%%a" +swap ^
	-gravity southeast ^
	-geometry +!timestampoffset!+!timestampoffset! ^
	-stroke !fontoutlinecolor! ^
	-strokewidth !outlinewidth! ^
	-composite "%cd%\stamped\%%a"

echo Complete!

More info

I also wrote a VBScript version of this operation as well but It would have a lot of black windows popping up being quite annoying.

Unfortunately hiding windows gets trickier when using VBScript when you also need to retrieve the return value from command line utilities.

If you want to check out the vbscript anyway you can still get it here (mirror) (git)