IRIXNetwork


  1. IRIX Network Forums
  2. SGI/MIPS
  3. Beginners' Questions/Tips

O2 boots with normal color, once logged in screen has green tint
#1
O2 boots with normal color, once logged in screen has green tint
Hi Irixers,

My O2 has the normal beautiful gradient blue during startup and POST, then it changes just before the login screen appears, to have a green tint. Have you folks seen this? I presume some setting, but where?

I appreciate any guidance, thank you.

KB
KayBee
Octane

Trade Count: (0)
Posts: 132
Threads: 40
Joined: Feb 2020
Find Reply
02-23-2020, 01:39 AM
#2
RE: O2 boots with normal color, once logged in screen has green tint
That's a monitor issue, not a setting issue. Your monitor isn't understanding sync on green properly.
I'm the system admin of this site. Private security technician, licensed locksmith, hack of a c developer and vintage computer enthusiast. 

https://contrib.irixnet.org/raion/ -- contributions and pieces that I'm working on currently. 

https://codeberg.org/SolusRaion -- Code repos I control

Technical problems should be sent my way.
Raion
Chief IRIX Officer

Trade Count: (9)
Posts: 4,239
Threads: 533
Joined: Nov 2017
Location: Eastern Virginia
Website Find Reply
02-23-2020, 03:26 AM
#3
RE: O2 boots with normal color, once logged in screen has green tint
(02-23-2020, 03:26 AM)Raion Wrote:  That's a monitor issue, not a setting issue. Your monitor isn't understanding sync on green properly.
Thank you Raion, what prevented me from settling on that is the initial boot looks correct, then it turns green. Does the boot process initially sync differently? Funny, I just saw your great VCF East 2019 photos and an Indy  is looking green on a Dell LCD. You are no doubt correct, just the initial boot throws me off. My LCD is a Sun.

cheers,
KB
KayBee
Octane

Trade Count: (0)
Posts: 132
Threads: 40
Joined: Feb 2020
Find Reply
02-23-2020, 06:16 AM
#4
RE: O2 boots with normal color, once logged in screen has green tint
(02-23-2020, 06:16 AM)KayBee Wrote:  
(02-23-2020, 03:26 AM)Raion Wrote:  That's a monitor issue, not a setting issue. Your monitor isn't understanding sync on green properly.
Thank you Raion, what prevented me from settling on that is the initial boot looks correct, then it turns green. Does the boot process initially sync differently? Funny, I just saw your great VCF East 2019 photos and an Indy  is looking green on a Dell LCD. You are no doubt correct, just the initial boot throws me off. My LCD is a Sun.

cheers,
KB

You can get it to work properly, as I've done with my O2, by modifying your VGA cable in this way. Just understand that this cable won't work with other machines once this mod has been done.

NOTE THE PIN THAT HAS BEEN PUSHED IN.

[Image: Mpj1HAa.jpg]
YouTube
Photo Gallery
(This post was last modified: 02-23-2020, 07:10 AM by Irinikus.)
 Irinikus
Hardware Connoisseur

Trade Count: (0)
Posts: 3,475
Threads: 319
Joined: Dec 2017
Location: South Africa
Website Find Reply
02-23-2020, 07:09 AM
#5
RE: O2 boots with normal color, once logged in screen has green tint
Very cool, will do that today. Thanks for teaching.

KB
KayBee
Octane

Trade Count: (0)
Posts: 132
Threads: 40
Joined: Feb 2020
Find Reply
02-23-2020, 11:49 AM
#6
RE: O2 boots with normal color, once logged in screen has green tint
Interesting - does disconnecting the HSync pin force it to assume sync-on-green mode or something? Seems like that'd still be monitor-dependent...
Computers: Amiga 1200, DEC VAXStation 4000/60, DEC MicroPDP-11/73
Synthesizers: Roland JX-10/SH-09/MT-32/D-50, Yamaha DX7-II/V50/TX7/TG33/FB-01, Korg MS-20 Mini/ARP Odyssey/DW-8000/X5DR, Ensoniq SQ-80, E-mu Proteus/2, Nord Lead 2, Behringer Model D
commodorejohn
PDP-X

Trade Count: (0)
Posts: 367
Threads: 7
Joined: May 2018
Find Reply
02-23-2020, 04:35 PM
#7
RE: O2 boots with normal color, once logged in screen has green tint
(02-23-2020, 04:35 PM)commodorejohn Wrote:  Interesting - does disconnecting the HSync pin force it to assume sync-on-green mode or something? Seems like that'd still be monitor-dependent...

It works with my DELL monitors. "SE2416H"
YouTube
Photo Gallery
Irinikus
Hardware Connoisseur

Trade Count: (0)
Posts: 3,475
Threads: 319
Joined: Dec 2017
Location: South Africa
Website Find Reply
02-23-2020, 04:42 PM
#8
RE: O2 boots with normal color, once logged in screen has green tint
Interesting. I too recently had noticed my O2’s video glitch when I switched to a different monitor, and I had used it before with no problems, so I started thinking..

Connecting the O2 with a VGA to BNC cable, and all of the BNCs connected to the monitor, the O2 was displaying a funny cast on the screen.

I had forgotten I was using the monitor with a non-SOG system earlier, and once I disconnected the H/V Sync BNCs, it went back to normal.

Indigo2 IMPACT  : R10K-195MHz, 1GB RAM, 146GB 15K, CD-ROM, AudioDAT, MaxImpact w/ TRAM.  IRIX 6.5.22

O2 : R12K-400MHz, 1GB RAM, 300GB 15K, DVD-ROM, CRM Graphics, AV1/2 Media Boards & O2 Cam, DV-Link, FPA & SW1600.  IRIX 6.5.30

 : 2 x R14K-600MHz, 6GB RAM, V12 Graphics, PCI Shoebox.  IRIX 6.5.30

IBM  : 7012-39H, 7043-140

 chulofiasco
Hardware Junkie

Trade Count: (0)
Posts: 327
Threads: 50
Joined: May 2019
Location: New York, NY
Website Find Reply
02-23-2020, 05:49 PM
#9
RE: O2 boots with normal color, once logged in screen has green tint
Hi All,

I was about to try Irinikus pin trick (which I am still curious about) when at work they gathered e-waste for a disposal so I grabbed an old Lenovo Thinkvision LCD. It worked immediately, so I now have a good display. Thank you for the advice.

KB
KayBee
Octane

Trade Count: (0)
Posts: 132
Threads: 40
Joined: Feb 2020
Find Reply
03-02-2020, 02:26 PM
#10
RE: O2 boots with normal color, once logged in screen has green tint
Ok, so I tried Irinikus pin trick and it works. Pushing in the middle pin on the bottom row (labelled as HSYNC in pinouts I found) does indeed make the O2 video out look correct on my SUN LCD monitor. Cheers to you Irinikus.

Man this community is great.

KB
KayBee
Octane

Trade Count: (0)
Posts: 132
Threads: 40
Joined: Feb 2020
Find Reply
04-02-2020, 07:14 PM
« Next Oldest | Next Newest »


Forum Jump:


Users browsing this thread: 1 Guest(s)