"X11 connection broke with certain web browsers + window managers"

[Tyler Johnson]

I have two browsers that I normally love: Pale Moon and Basilisk. Unfortunately, both trigger a bug in Xorg, where the server just crashes, and returns me to the login screen. The problem does not affect the XFCE4 desktop environment, but it does affect Cinnamon. I have a first-gen Intel Core i5 mobile processor, and while I'm running Linux Mint 21, I believe the problem affects Ubuntu 22.04.

For more info, please see the bug reports I filed for Mint, from the following URLs:

https://github.com/linuxmint/mint21-beta/issues/148
https://github.com/linuxmint/cinnamon/issues/10972

Please note, I just recently tested a daily build of Ubuntu 23.10 with Gnome, and had the same issue. Debian 12 also has the same problem, although I have not filed a bug report there.

How to reproduce: use either of the previously-mentioned web browsers, and open literally any webpage, except those build in to the browser. (Eg, this very page will crash X, but "about:" pages won't.) X will crash within seconds.

I will attach the output of "inxi -Fxxxrz" below (as "info.txt").

PS: IDK if "mesa" is the right package for this bug report. Perhaps it should be an Xorg package?

[Oibaf (oibaf)]

I read the linked bugs.
What's interesting from your Xorg.0.log.old is below.
As noted, please report a new bug here:
https://gitlab.freedesktop.org/mesa/mesa/-/issues/new
And attach (plain file, not compressed) an updated Xorg.0.log were you can see the following information.

[ 782.401] (II) modeset(0): [DRI2] DRI driver: crocus
[...]
[ 838.386] 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

[ 838.386] 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)
[ 838.386] (EE)
Fatal server error:
[ 838.387] (EE) GLSL compile failure
[ 838.387] (EE)
[ 838.387] (EE)
Please consult the The X.Org Foundation support
         at http://wiki.x.org
 for help.
[ 838.387] (EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information.
[ 838.387] (EE)
[ 838.387] (II) AIGLX: Suspending AIGLX clients for VT switch
[ 838.447] (EE) Server terminated with error (1). Closing log file.