Screen glitch at boot on iMac 2009

General Help
1

hi
zorin education has just been installed on ssd in iMac 2009.

the starting process is very long. it shows a glitch freeze for about 2min after Z logo is displayed.

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when system is running, it all seems to work fine. But the brightness cursor is missing from the status bar next to the volume cursor. this brightness cursor was displayed during live session.

there is quick glitch at shut down, as shut down is down in 3sec.

any lead where to start looking?
could it be a hardware incompatibility?

i should add that High Sierra worked perfectly on the hard drive before Zorin install - no hardware defection. if i boot with a different live medium than zorin, everything works perfectly and fast. zorin live is very slow, the mouse cursor moves quite slowly on the screen.

thank you all if you can help
have a great day

2

What graphics chip/card does the iMac use?

3

nvidia geforce 9400

I have since discovered that drivers won't be install from the Update software app. That i should install them manually.

and this is where the problem begins.

I had in mind that Linux was the solution for low-tech and reviving old computers. but here is a limit: the constructor drivers. they are no more maintained.

If generic drivers worked fine then no question. but here, it is a question.

i managed to install driver 340 but i can't select it in the drivers window. it is blocked on x server.

can one share its experience and solution with this graphic card?

it appears that those drivers allow the system too boot faster.. 1min30 to reach login screen. which is still not acceptable.
especially compared to the turn off time: 3secs.

thanks for your concern
have a great day :slight_smile:

4

I recommend using the patched legacy support ppa for older Nvidia drivers rather than manually installing the Nvidia packaged ones.

sudo add-apt-repository ppa:kelebek333/nvidia-legacy

sudo apt update

sudo apt install nvidia-340-updates nvidia-340-updates-dev xorg-modulepath-fix

1 Like
5

thanks @Aravisian!
shall i uninstall any other driver, or format the machine again?

6

No need to format the machine - but be sure to remove any previous Nvidia drivers prior to installing one.

sudo apt remove --purge '^nvidia-.*'

1 Like
7

then, well, at least, i tried ^^
i installed it, didn't work
i formated, installed it, black screen
i formated, installed it, serious glitching
I'm afraid it's just not gonna work it seems.

Sad though, I liked Zorin.
Thinking a core 2 duo, 500GB ssd, 8gig RAM, beautiful screen, won't have apple's update, can't run a linux .. sad, really, sad :frowning:

8

thanks again @Aravisian for your advices :v:

9

You are certain you are logging in on the Zorin Desktop on Xorg, not Wayland, correct?
You might also need an earlier kernel due to a need for module fixing on the 340 legacy driver.

10

thanks you again for your guidance
no, i haven't tried any of this, because i haven't heard nothing about this before. I saw this xorg in the command you recommended.
would you mind explaining? It sounds like a bigger thing to operate though..

I'm trying Mint right now

11

Any luck there?

12

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