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ClaudioP

Member

From: Portugal

Registered: 2012-03-11

Posts: 60

Artifacts after login (GDM)

Hi. Whenever GDM starts either gnome-shell or i3 this is what it looks like: http://i.imgur.com/DFE1vxr.jpg

gnome-shell 'crashes'(at least seems so) after a few seconds, and after reloading itself, it comes just fine, without artifacts.
i3 has those forever on the background (which fortunately is never seen on a tilling wm...)

This happens on a laptop running r600, but doesn't happens on a desktop with the nvidia BLOB.
Its happening for months, and I was hoping for a quick fix at first, but now I'm not sure if it only happens to me.

It doesn't happen with startx.

Any ideas on what can be the cause?
I've been ignoring this but its really annoying having to wait almost two minutes for the laptop to boot to a functional gnome shell (after crashing), not to mention the bad image it gives of Linux to the people around.

Last edited by jasonwryan (2015-11-15 22:24:49)

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jasonwryan

Anarchist

From: .nz

Registered: 2009-05-09

Posts: 30,426

Website

Re: Artifacts after login (GDM)

You've been here long enough to know the etiquette about images: http://wiki.archlinux.org/index.php/For … s_and_code

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ClaudioP

Member

From: Portugal

Registered: 2012-03-11

Posts: 60

Re: Artifacts after login (GDM)

You've been here long enough to know the etiquette about images: http://wiki.archlinux.org/index.php/For … s_and_code

I'm sorry. Got used to forums using softwares which resize the images. I don't post here often and forgot about that

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Palmitoxico

Member

From: Brazil

Registered: 2015-09-24

Posts: 17

Re: Artifacts after login (GDM)

I'm experiencing similar issues on my desktop (Gnome 3.18 with GDM) with the Radeon HD6850 video card (open source drivers): http://i.imgur.com/qsHb70W.jpg. Gnome seems to 'crash' and restart successfully, although dmesg doesn't show any segmentation fault.

It seems that the graphics driver is displaying uninitialized data (if I reboot the machine instead of getting this semi-random checkerboard pattern I get the last screen of the previous desktop session).

I also get this dmesg output:

[  101.871771] radeon 0000:01:00.0: evergreen_surface_check_2d:278 texture pitch 1920 invalid must be aligned with 512
[  101.871776] radeon 0000:01:00.0: evergreen_cs_track_validate_texture:827 texture invalid 0x1dfc3bc1 0x40000437 0x060a0000 0x00000000 0x80000000 0x800304da
[  101.871792] [drm:radeon_cs_ioctl [radeon]] *ERROR* Invalid command stream !

About the slow start of Gnome Shell, I've had this problem before and solved uninstalling the tracker package (it was keeping my hard disk busy for more or less 1 minute after I logged in).

ClaudioP

Member

From: Portugal

Registered: 2012-03-11

Posts: 60

Re: Artifacts after login (GDM)

Ok, so I'm not the only one.
We both run r600. I have a 6310 and you a 6850, both N.Islands.
Last time I checked, GDM had reported nothing wrong to the system logs.

Not sure about what data the driver is displaying. Sometimes its totally random, but sometimes it has 'nice' rectangle patterns and such. Like if there was a chessboard, and it was stretched, and each line had a padding in relation to the previous. Sort of a brick pattern.

I know nothing about graphic drivers, but it would be weird for uninitialized data to have such patterns. Even weirder since the computer was turned on seconds ago and nothing else ran on the graphic card other than GDM itself.
Also since GDM seems to be a requirement for it to happen, I'm not sure if the driver has any fault.

BTW, thanks for the tip, tried to uninstall tracked.

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