Xorg server segmentation fault when monitor is not connected.

[Chung-Yeol Lee]

Hi!

Since I updated Xorg server from 1.18.4_10,1 -> 1.18.4_11,1,
the server does not start up when the monitor is not connected.
(I actually updated bunch of other ports at that time, including mesa-dri
etc, so it might be something else).

I'm on 12-STABLE / AMD Radeon 7450 with radeonkms.ko.
The server works fine as soon as I connect the monitor.

Is this a known issue?

Thanks,
Chung-yeol

* Here's backtrace from Xorg.0.log:
[  3601.265] (EE) Backtrace:
[  3601.268] (EE) 0: /usr/local/lib/libunwind.so.8 (?+0x423a13)
[0x800824413]
[  3601.271] (EE) 1: /lib/libthr.so.3 (pthread_sigmask+0x544) [0x800adc7b4]
[  3601.273] (EE) 2: /lib/libthr.so.3 (pthread_getspecific+0xe0f)
[0x800adc62f]
[  3601.276] (EE) 3: ? (?+0xe0f) [0x7fffffffff82]
[  3601.278] (EE) 4: /lib/libc.so.7 (memcpy+0x2b) [0x800ca32a6]
[  3601.281] (EE) 5: /usr/local/lib/dri/r600_dri.so (?+0x2b) [0x802361b1b]
[  3601.284] (EE) 6: /usr/local/lib/dri/r600_dri.so (?+0x2b) [0x8024be15b]
[  3601.286] (EE) 7: /usr/local/lib/dri/r600_dri.so (?+0x2b) [0x8024bdecb]
[  3601.289] (EE) 8: /usr/local/lib/dri/r600_dri.so (?+0x2b) [0x80263b6bb]
[  3601.291] (EE) 9: /usr/local/lib/dri/r600_dri.so (?+0x2b) [0x801ebc21b]
[  3601.294] (EE) 10: /usr/local/lib/dri/r600_dri.so (?+0x2b) [0x802464d4b]
[  3601.297] (EE) 11: /usr/local/lib/dri/r600_dri.so (?+0x2b) [0x8022d4afb]
[  3601.299] (EE) 12: /usr/local/lib/dri/r600_dri.so (?+0x2b) [0x8022d0f7b]
[  3601.302] (EE) 13: /usr/local/lib/libgbm.so.1
(gbm_surface_has_free_buffers+0x1772) [0x801b08582]
[  3601.304] (EE) 14: /usr/local/lib/libgbm.so.1
(gbm_surface_has_free_buffers+0x195) [0x801b05985]
[  3601.307] (EE) 15: /usr/local/lib/libgbm.so.1 (gbm_create_device+0x3e)
[0x801b051be]
[  3601.310] (EE) unw_get_proc_name failed: no unwind info found [-10]
[  3601.310] (EE) 16: /usr/local/lib/xorg/modules/drivers/radeon_drv.so
(?+0x3e) [0x801ae2dce]
[  3601.312] (EE) unw_get_proc_name failed: no unwind info found [-10]
[  3601.312] (EE) 17: /usr/local/lib/xorg/modules/drivers/radeon_drv.so
(?+0x3e) [0x801ad3aae]
[  3601.315] (EE) 18: /usr/local/bin/X (?+0x3e) [0x2d2b0e]
[  3601.318] (EE) 19: /usr/local/bin/X (?+0x3e) [0x28f14e]
[  3601.320] (EE) 20: /usr/local/bin/X (?+0x3e) [0x27903e]
[  3601.323] (EE) 21: ? (?+0x3e) [0x80043a03e]
[  3601.323] (EE)
[  3601.323] (EE) Segmentation fault at address 0x8061e9000