Hi All,
I'm using Porteus-Kiosk for signage applications and it works very well, but now i got a little problem.
I want to control two VGA displays simultanously, via an active VGA splitter.
The desired settings are 1024x768, 24bit, 60Hz. In the Porteus-Kiosk wizard I set the lines below:
screen_refresh_rate=60
screen_resolution=1024x768
It starts up well if I connect only one display. It also works if I start up the system with one display, then connect the VGA splitter.
But if I want to start it up with the connected VGA splitter and two displays, it breaks down when the GUI starts to loading. After this, I cannot catch the signal with one monitor or two, it doesn't work.
The listed settings are maximums, so maybe Linux checks something at startup and the splitter makes a measurement mistake, so that it sets incorrect resolution or freq.
Is there a way to skip this check at startup and set these properties directly?
Thanks in advance!
Booting problem with VGA splitter
- fanthom
- Moderator Team
- Posts: 5667
- Joined: 28 Dec 2010, 02:42
- Distribution: Porteus Kiosk
- Location: Poland
- Contact:
Re: Booting problem with VGA splitter
hello unikumi,
please remaster kiosk ISO, unsquash 003-settings.xzm and delete/rename /opt/porteus-scripts/scale-screens (or similar name) script.
squash 003-settings.xzm back and create new ISO.
you may follow this guide:
http://porteus-kiosk.org/kiosk-customization.html
if that wont help then i have no other ideas at the moment.
please remaster kiosk ISO, unsquash 003-settings.xzm and delete/rename /opt/porteus-scripts/scale-screens (or similar name) script.
squash 003-settings.xzm back and create new ISO.
you may follow this guide:
http://porteus-kiosk.org/kiosk-customization.html
if that wont help then i have no other ideas at the moment.
Please add [Solved] to your thread title if the solution was found.
Re: Booting problem with VGA splitter
Dear fanthom,
Thank you for your reply, i tried it out for some times, but there is another problem
( History:
1. I made an iso with the desired settings and saved it.
2. On a working live Porteus, I decompressed this iso to /tmp/kiosk_ISO/
3. unsquashed 003-settings.xzm
4. renamed the scale-screen script
5. squashed the files back to /tmp/kiosk_ISO/xzm/003-settings.xzm with the recommended option settings ( -comp xz -b 256K -Xbcj x86 -noappend )
6. ran make_iso.sh so I get /tmp/Portueus-Kiosk.iso
7. I want to boot from USB flash disk so ran isohybrid /tmp/Porteus-Kiosk.iso (UEFI is not available on the target PC)
8. dd if=Porteus-Kiosk.iso of=/dev/sdb )
After these steps, I get this message while booting:
http://kepfeltoltes.hu/150722/WP_201507 ... es.hu_.jpg
I tried it almost three times and got the same but I really don't want to give up!
What would be the problem? Maybe something is wrong with the filesystem (that "filenames" in the message...)?
Please help me, I feel that I'm not so far from the goal
Thank you in advance!
Thank you for your reply, i tried it out for some times, but there is another problem

( History:
1. I made an iso with the desired settings and saved it.
2. On a working live Porteus, I decompressed this iso to /tmp/kiosk_ISO/
3. unsquashed 003-settings.xzm
4. renamed the scale-screen script
5. squashed the files back to /tmp/kiosk_ISO/xzm/003-settings.xzm with the recommended option settings ( -comp xz -b 256K -Xbcj x86 -noappend )
6. ran make_iso.sh so I get /tmp/Portueus-Kiosk.iso
7. I want to boot from USB flash disk so ran isohybrid /tmp/Porteus-Kiosk.iso (UEFI is not available on the target PC)
8. dd if=Porteus-Kiosk.iso of=/dev/sdb )
After these steps, I get this message while booting:
http://kepfeltoltes.hu/150722/WP_201507 ... es.hu_.jpg
I tried it almost three times and got the same but I really don't want to give up!

What would be the problem? Maybe something is wrong with the filesystem (that "filenames" in the message...)?
Please help me, I feel that I'm not so far from the goal

- fanthom
- Moderator Team
- Posts: 5667
- Joined: 28 Dec 2010, 02:42
- Distribution: Porteus Kiosk
- Location: Poland
- Contact:
Re: Booting problem with VGA splitter
looks like ISO got corrupted somehow. perhaps when it was burned on /dev/sdb.
please test the ISO in VirtualBox. if it works then try burning it on some other usb stick.
please test the ISO in VirtualBox. if it works then try burning it on some other usb stick.
Please add [Solved] to your thread title if the solution was found.