graphics glitch login screen high sierra 10.13.5

joebclash

macrumors regular
Original poster
Jun 14, 2016
196
114
I have a flash 5 1. I have been using high sierra for a while. Starting with 10.13.4 and now with 10.13.5, I have this weird graphic's glitch on the login screen. The login screen looks grabbled. It's hard to explain. After login everything is fine. This happens with multiple gpu (gtx 650, gtx750 and gt120). Anyone else have this issue? This also happens with or without nvidia webdrivers.
 
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lclev

macrumors 6502
Jul 29, 2013
291
98
Ohio
Could you post a picture of it? I have had a flashing of lines of code before the login in box appears. Nothing else on my flashed 5,1 with a GTX 1080. I noticed the lines of code seemed to appear with the nvidia web drivers for 10.13.3 then disappeared with 10.13.4 and now with 10.13.5 they are back. They don't seem to hurt anything.

Lisa
 

flowrider

macrumors 603
Nov 23, 2012
6,133
2,326
Early in 10.13 I had a screen flash with, as described above, lines of code before the apple popped up. Since 10.13.4 that has evolved into a rolling screen displaying the same type of info. cMP 5,1 with MVC flashed GTX 1080. I'm sure it's nothing to worry about.

Lou
 

crjackson2134

macrumors 601
Mar 6, 2013
4,737
1,884
Charlotte, NC
When you say lines of code appearing before the login scree, are we talking text. As in loading in verbose mode before graphical mode initializes?
 

flowrider

macrumors 603
Nov 23, 2012
6,133
2,326
^^^^Never stopped to read it before. Not code, don't know what the heck it is.

Sceen.jpg
Screen.1.jpg


Lou
 

lclev

macrumors 6502
Jul 29, 2013
291
98
Ohio
Yeah, that ^^^^^ pretty much is what I have been seeing. Doesn't really create any issues.

Lisa
 

crjackson2134

macrumors 601
Mar 6, 2013
4,737
1,884
Charlotte, NC
It’s a verbose output of drivers loading I believe.

I see similar in Linux all the time and it causes no problem. I think other drivers are loading ahead of the graphics driver, so you get to watch wheather you want to or not. Nothing to worry about.
 
Last edited:

bsbeamer

macrumors 68040
Sep 19, 2012
3,682
1,950
I had seen similar on shutdown previously, but never on startup... though I'm using a non-EFI card. I cloned my APFS 10.13 SSD to an HFS+ SSD to troubleshoot another issue and have not seen anything similar since. Occasionally get the non-blinking DOS-style cursor in the upper left on shutdown.
 

joebclash

macrumors regular
Original poster
Jun 14, 2016
196
114
This is what my login looks like started with 10.13.4. It's really driving me nuts.
 

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bsbeamer

macrumors 68040
Sep 19, 2012
3,682
1,950
Wow, that almost looks like a bad cable or a corrupt DP connection before the monitor is able to auto-switch to the correct setting. Any chance there is a mode you can change on your monitor for DP version or disable processing on the monitor? Any other monitors (or TVs) you can try?
 

joebclash

macrumors regular
Original poster
Jun 14, 2016
196
114
Wow, that almost looks like a bad cable or a corrupt DP connection before the monitor is able to auto-switch to the correct setting. Any chance there is a mode you can change on your monitor for DP version or disable processing on the monitor? Any other monitors (or TVs) you can try?
I tried different monitors with different type of connections. Different gpu. Different drivers. All has this graphic glitch on login screen. It started with 10.13.4...
 

lclev

macrumors 6502
Jul 29, 2013
291
98
Ohio
Wow! That is like really ugly. I have seen nothing like that. You have tried all the ideas I have - change gpu, change monitor, change cables, update drivers. And yet it is fine after you finally get logged in?

Only other idea I have would be there is something loading - an app??? that is causing the issue???

Lisa
 
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