Display does not start on HD7770

[hansmicheelsen]

I cannot get my graphics display to start. I get "Sorry, but there is a problem starting your graphical display".
I realize, that fglrx is not available on Cauldron (yet?) so I've tried vesa, ati and amdgpu as driver in xorg.conf. But nothing helps.
I also removed vga=788 from /etc/default/grub as advised on https://wiki.archlinux.org/index.php/AMDGPU. But nothing helps

I've have searched a lot on the internet and certainly also on bugs.mageia.org, but noone seems to have seen this before. Please help me if you can

[gohlip]

I have catalyst and using fglrx in Mageia 6 (cauldron).

You can when booted to prompt, use "drakconf" (as root) to try to fix it.
Display --> and continue from there.

I am using grub 2, and to boot to prompt, I remove 'splash' and 'quiet' and add '3' (no appos) to boot.
Login as user and
sudo drakconf
'su' as root and proceed.

I am (now) totally lost how to do boot to prompt in grub-legacy (which you use - and I think the grub2 method does not apply), so hope others here can help to show how to boot to prompt in your case.
But try same as in above grub2.
Good luck.

[edit] - [some flashback] add 'single' but that should boot to root; unsure if you can have internet connection which drakconf needs.

[doktor5000]

I am (now) totally lost how to do boot to prompt in grub-legacy (which you use - and I think the grub2 method does not apply), so hope others here can help to show how to boot to prompt in your case.

Well, both grub2 and grub legacy offer to change the boot options in the bootloader itself, and both just pass all the options provided to initrd/kernel and init system (well, actually for grub 2 quite a number of the options are grub2 internal options ) so the same that you wrote also applies to grub legacy - add a "3" for runlevel 3 (multiuser, network but no graphical server) to the end of the options, although without the quotes.

[gohlip]

Thanks doktor5000 and good luck hansmicheelsen.

[hansmicheelsen]

I have catalyst and using fglrx in Mageia 6 (cauldron).

But how did you get fglrx. Did you take a rpm from a former version of mga?

You can when booted to prompt, use "drakconf" (as root) to try to fix it.
Display --> and continue from there.

I think I've tried everything in drakconf. No luck.
Btw. I prefer editing conf-files directly with vi. Much easier and faster I think.

Thank you for your help. I'll keep on experimenting.

[gohlip]

But how did you get fglrx. Did you take a rpm from a former version of mga?

From MCC, Hardware --> Graphical Server --> Graphic Cards --> And it autoselected for me Vendor -->ATI -->radeoan/fglrx
Whenever I installed Mageia, one of the first thing I did was to set up as much as possible from MCC before doing other stuff.
Great thing , MCC, that's what got me into linux, and I'm grateful.

I understand you cannot access MCC from prompt, only drackconf and it is much more limited than MCC
Graphic drivers is not my strong point
I am not good in graphic drivers and hope others here can help you fix it from the prompt line.
Perhaps some urpmi from some url or some rpm. Sorry.

[edit] - just a thought (may or may not work), perhaps boot to vesa to some rough resolution and attempt MCC?
use 'nomodeset' or something like i915.modeset=0 nouveau.modeset=0 in grub kernel parameter?

[hansmicheelsen]

To follow up on this thread I got my system working - sort of. In xorg.conf I've set the driver to radeon. Setting to ati works as well, but not fglrx nor amdgpu. Not surprising as fglrx is not available to cauldron and amdgpu is not yet ready for Southern Islands (HD7770) .
But to get things to work I had to delete the .dbus directory in my home dir.
And resolution is not very good - 1024x768

So SORT OF WORKING, not SOLVED

[gohlip]

Thanks for the update.

And glad it's .... "SORT OF WORKING".
Cheers.

[pete910]

To follow up on this thread I got my system working - sort of. In xorg.conf I've set the driver to radeon. Setting to ati works as well, but not fglrx nor amdgpu. Not surprising as fglrx is not available to cauldron and amdgpu is not yet ready for Southern Islands (HD7770) .
But to get things to work I had to delete the .dbus directory in my home dir.
And resolution is not very good - 1024x768

So SORT OF WORKING, not SOLVED

To use the AMDGPU driver the radeon driver has to be blacklisted on boot via grub.

The kernel was enabled via request to support pre GCN 1.2 cards.