00:01.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Mullins [Radeon R4/R5 Graphics] (rev 05)
I had to change /etc/X11/xorg.conf to Option “NoAccel” “True” to get xorg start.
EXA not supported.
Old/other kernel same issue. So it’s not the kernel.
X Server version did not change (1.19.6) I can’t find any libs that changed.
I can not figure out which package did this.

Can anyone please recommend how to troubleshoot to find the culprit?

After update:
[ 12.688] (II) Loading sub module “glamoregl”
[ 12.688] (II) LoadModule: “glamoregl”
[ 12.688] (II) Loading /usr/lib/xorg/modules/libglamoregl.so
[ 12.694] (II) Module glamoregl: vendor=“X.Org Foundation”
[ 12.694] compiled for 1.19.6, module version = 1.0.0
[ 12.694] ABI class: X.Org ANSI C Emulation, version 0.4
[ 12.694] (II) glamor: OpenGL accelerated X.org driver based.
[ 12.783] (II) glamor: EGL version 1.5 (DRI2):
[ 12.783] (EE) RADEON(0): Failed to create EGL context
[ 12.790] (EE)
[ 12.790] (EE) Backtrace:
[ 12.790] (EE) 0: /usr/lib/xorg-server/Xorg (OsSigHandler+0x29) [0x561d77118cd9]
[ 12.791] (EE) 1: /usr/lib/libpthread.so.0 (funlockfile+0x50) [0x7f79a2b82acf]
[ 12.792] (EE) 2: /usr/lib/dri/radeonsi_dri.so (ZNSt6vectorIPvSaIS0_EE17_M_realloc_insertIJRKS0_EEEvN9__gnu_cxx17__normal_iteratorIPS0_S2_EEDpOT+0x4b464) [0x7f799d07c5f4]
[ 12.793] (EE) 3: /usr/lib/dri/radeonsi_dri.so (__driDriverGetExtensions_virtio_gpu+0x75c1) [0x7f799ce8d641]
[ 12.793] (EE) 4: /usr/lib/dri/radeonsi_dri.so (__driDriverGetExtensions_virtio_gpu+0x75e5) [0x7f799ce8d6a5]
[ 12.793] (EE) 5: /usr/lib/dri/radeonsi_dri.so (__driDriverGetExtensions_virtio_gpu+0x5ef) [0x7f799ce7f6bf]
[ 12.794] (EE) 6: /usr/lib/libgbm.so.1 (gbm_surface_has_free_buffers+0xae0) [0x7f799e97a210]
[ 12.794] (EE) 7: /usr/lib/xorg/modules/libglamoregl.so (glamor_egl_cleanup+0x43) [0x7f799eb8ac23]
[ 12.795] (EE) 8: /usr/lib/xorg/modules/libglamoregl.so (glamor_egl_init+0x2a8) [0x7f799eb8be78]
[ 12.795] (EE) 9: /usr/lib/xorg/modules/drivers/radeon_drv.so (_init+0x4c718) [0x7f799f28cb98]
[ 12.796] (EE) 10: /usr/lib/xorg/modules/drivers/radeon_drv.so (_init+0x3df8e) [0x7f799f26f1ee]
[ 12.796] (EE) 11: /usr/lib/xorg-server/Xorg (InitOutput+0xad8) [0x561d76ffb6c8]
[ 12.797] (EE) 12: /usr/lib/xorg-server/Xorg (dix_main+0x1c5) [0x561d76fba025]
[ 12.797] (EE) 13: /usr/lib/libc.so.6 (__libc_start_main+0xeb) [0x7f79a27d806b]
[ 12.798] (EE) 14: /usr/lib/xorg-server/Xorg (_start+0x2a) [0x561d76fa3f7a]
[ 12.798] (EE)
[ 12.798] (EE) Segmentation fault at address 0x28

Before update:
[199531.273] (II) Loading sub module “glamoregl”
[199531.273] (II) LoadModule: “glamoregl”
[199531.273] (II) Loading /usr/lib/xorg/modules/libglamoregl.so
[199531.280] (II) Module glamoregl: vendor=“X.Org Foundation”
[199531.280] compiled for 1.19.6, module version = 1.0.0
[199531.280] ABI class: X.Org ANSI C Emulation, version 0.4
[199531.280] (II) glamor: OpenGL accelerated X.org driver based.
[199531.401] (II) glamor: EGL version 1.5 (DRI2):
[199531.410] (II) RADEON(0): glamor detected, initialising EGL layer.