Xorg crashes when opening certain programs

[Olivier Fourdan]

Hi,

On Fri, 15 Apr 2022 at 10:09, DdP Lombard <ddp at lombards.xyz> wrote:

> Hey,
> I'm currently using the new "Crocus" driver for my GMA4500MHD, but
> unfortunately Xorg crashes, when I open certain images, display certain
> websites or simply open some programs. I think some GLSL functions
> are being called that my GPU can't offer. Here is my xorg.log
>
>
>
> [  3751.392] Failed to compile FS: 0:1(10): error: GLSL 1.30 is not
> supported. Supported versions are: 1.10, 1.20, and 1.00 ES
>
> [  3751.392] Program source:
> #version 130
> #ifdef GL_ES
> precision mediump float;
> #endif
> #define RepeatNone                            0
> #define RepeatNormal                     1
> #define RepeatPad                        2
> #define RepeatReflect                    3
> #define RepeatFix                             10
> uniform int                     source_repeat_mode;
> uniform int                     mask_repeat_mode;
> vec2 rel_tex_coord(vec2 texture, vec4 wh, int repeat)
> {
>         vec2 rel_tex;
>         rel_tex = texture * wh.xy;
>         if (repeat == RepeatFix + RepeatNone)
>                 return rel_tex;
>         else if (repeat == RepeatFix + RepeatNormal)
>                 rel_tex = floor(rel_tex) + (fract(rel_tex) / wh.xy);
>         else if (repeat == RepeatFix + RepeatPad) {
>                 if (rel_tex.x >= 1.0)
>                         rel_tex.x = 1.0 - wh.z * wh.x / 2.;
>                 else if (rel_tex.x < 0.0)
>                         rel_tex.x = 0.0;
>                 if (rel_tex.y >= 1.0)
>                         rel_tex.y = 1.0 - wh.w * wh.y / 2.;
>                 else if (rel_tex.y < 0.0)
>                         rel_tex.y = 0.0;
>                 rel_tex = rel_tex / wh.xy;
>         } else if (repeat == RepeatFix + RepeatReflect) {
>                 if ((1.0 - mod(abs(floor(rel_tex.x)), 2.0)) < 0.001)
> [  3751.392] (EE)
> Fatal server error:
> [  3751.395] (EE) GLSL compile failure
> [  3751.395] (EE)
> [  3751.395] (EE)
> Please consult the The X.Org Foundation support
>          at http://wiki.x.org
>  for help.
> [  3751.395] (EE) Please also check the log file at
> "/home/lombard/.local/share/xorg/Xorg.0.log" for additional
> information. [  3751.395] (EE) [  3751.396] (II) AIGLX: Suspending
> AIGLX clients for VT switch [  3751.444] (EE) Server terminated with
> error (1). Closing log file.
>

That's glamor (in glamor_create_composite_fs() function), please file an
issue in gitlab [1] and attach the relevant logs
("/home/lombard/.local/share/xorg/Xorg.0.log").

I suspect this is with the latest xserver 21.1? I wonder if commit
 a9552868 [2] could possibly be related, maybe try with xserver 1.20 to see
if it has the same issue?

Meanwhile, as a workaround, you may want to disable glamor in your
xorg.conf, it will be slower but it shouldn't crash.

HTH
Cheers
Olivier

[1] https://gitlab.freedesktop.org/xorg/xserver/-/issues
[2] https://gitlab.freedesktop.org/xorg/xserver/-/commit/a95528686
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