Hello Md Ayquassar,
Am 31.01.20 um 02:23 schrieb Md Ayquassar: > Second, is a reassignment to some Mesa package required? I guess mesa maintainer would have more insight if that function pointer is allowed to be NULL, there possibly yes. I wonder if the content of /var/log/Xorg.0.log* would reveal some more error messages? Just for a workaround, does giving nomodeset on the kernel prompt a different result? > Third, is there anything else I can do as a user to help the developers > to bugfix this? Bug at line 1017 is strange: if there is a NULL > dereference there, there should also probably be one in line 1016 unless > someone has a deterministic concurrent access to that data. > https://sources.debian.org/src/mesa/18.3.6-2/src/egl/drivers/dri2/egl_dri2.c/#L1017 I assume line 1017, 1018 and 1019 are one statement, therefore gdb shows 1017. Further I think the function pointer "dri2_dpy->dri2->allocateBuffer" contains the NULL, therefore the "ip 00000000" in your dmesg output. A "regular" segfault should still show a sane instruction pointer value. Kind regards, Bernhard