After solving the relative path issue I now have better info:
(gdb) s
__vaDriverInit_1_17 (ctx=0x5555555702b0) at
../src/gallium/frontends/va/context.c:123
123 if (!ctx)
(gdb) n
126 drv = CALLOC(1, sizeof(vlVaDriver));
(gdb) n
127 if (!drv)
(gdb) n
130 switch (ctx->display_type) {
(gdb) n
142 drv->vscreen = vl_dri3_screen_create(ctx->native_dpy,
ctx->x11_screen);
(gdb) n
143 if (!drv->vscreen)
(gdb) n
144 drv->vscreen = vl_dri2_screen_create(ctx->native_dpy,
ctx->x11_screen);
(gdb) s
vl_dri2_screen_create (display=0x55555555d370, screen=0) at
../src/gallium/auxiliary/vl/vl_winsys_dri.c:375
375 {
(gdb) n
385 xcb_generic_error_t *error = NULL;
(gdb) n
394 scrn = CALLOC_STRUCT(vl_dri_screen);
(gdb) n
395 if (!scrn)
(gdb) n
398 scrn->conn = XGetXCBConnection(display);
(gdb) n
399 if (!scrn->conn)
(gdb) n
402 xcb_prefetch_extension_data(scrn->conn, &xcb_dri2_id);
(gdb) n
404 extension = xcb_get_extension_data(scrn->conn, &xcb_dri2_id);
(gdb) n
405 if (!(extension && extension->present))
(gdb) n
408 dri2_query_cookie = xcb_dri2_query_version (scrn->conn,
(gdb) n
411 dri2_query = xcb_dri2_query_version_reply (scrn->conn,
dri2_query_cookie, &error);
(gdb) n
412 if (dri2_query == NULL || error != NULL ||
dri2_query->minor_version < 2)
(gdb) n
496 free(dri2_query);
(gdb) p dri2_query
$1 = (xcb_dri2_query_version_reply_t *) 0x5555555f26a0
(gdb) p dri2_query->minor_version
$2 = 0
(gdb) n
497 free(error);
(gdb) n
500 FREE(scrn);
(gdb) n
501 return NULL;
(gdb) n
__vaDriverInit_1_17 (ctx=0x5555555702b0) at
../src/gallium/frontends/va/context.c:145
145 if (!drv->vscreen)
(gdb) n
231 FREE(drv);
(gdb) n
232 return VA_STATUS_ERROR_ALLOCATION_FAILED;
(gdb) n
va_openDriver (dpy=dpy@entry=0x555555570140, driver_name=<optimized
out>) at ./va/va.c:535
535 if (VA_STATUS_SUCCESS == vaStatus) {
(gdb) n
583 va_errorMessage(dpy, "%s init failed\n",
driver_path);
(gdb) n
libva error: /usr/lib/x86_64-linux-gnu/dri/radeonsi_drv_video.so init failed
584 dlclose(handle);
