(gdb) bt full
#0  0x00007f36b81dd59d in read () from /lib64/libc.so.6
No symbol table info available.
#1  0x00007f36b928ce17 in drmHandleEvent () from /usr/lib64/libdrm.so.2
No symbol table info available.
#2  0x00007f36b48fafac in drmmode_set_mode_major (crtc=0xeefa10, mode=<optimized out>, rotation=<optimized out>, 
    x=<optimized out>, y=<optimized out>) at drmmode_display.c:862
        pScrn = <optimized out>
        pScreen = 0xef8560
        info = 0xe53240
        xf86_config = <optimized out>
        drmmode_crtc = 0xef04e0
        drmmode = <optimized out>
        saved_x = 0
        saved_y = 0
        saved_rotation = 1
        saved_mode = {prev = 0x0, next = 0x0, name = 0x0, status = MODE_OK, type = 72, Clock = 108000, 
          HDisplay = 1280, HSyncStart = 1328, HSyncEnd = 1440, HTotal = 1688, HSkew = 0, VDisplay = 1024, 
          VSyncStart = 1025, VSyncEnd = 1028, VTotal = 1066, VScan = 0, Flags = 5, ClockIndex = 0, 
          SynthClock = 0, CrtcHDisplay = 1280, CrtcHBlankStart = 1280, CrtcHSyncStart = 1328, 
          CrtcHSyncEnd = 1440, CrtcHBlankEnd = 1688, CrtcHTotal = 1688, CrtcHSkew = 0, CrtcVDisplay = 1024, 
          CrtcVBlankStart = 1024, CrtcVSyncStart = 1025, CrtcVSyncEnd = 1028, CrtcVBlankEnd = 1066, 
          CrtcVTotal = 1066, CrtcHAdjusted = 0, CrtcVAdjusted = 0, PrivSize = 0, Private = 0x0, PrivFlags = 0, 
          HSync = 0, VRefresh = 60.0197411}
        output_ids = 0x16fde30
        output_count = <optimized out>
        ret = <optimized out>
        i = <optimized out>
        fb_id = 76
        kmode = {clock = 108000, hdisplay = 1280, hsync_start = 1328, hsync_end = 1440, htotal = 1688, 
          hskew = 0, vdisplay = 1024, vsync_start = 1025, vsync_end = 1028, vtotal = 1066, vscan = 0, 
          vrefresh = 0, flags = 5, type = 0, name = '\000' <repeats 31 times>}
        pitch = <optimized out>
        tiling_flags = <optimized out>
#3  0x00007f36b48f503d in RADEONUnblank (pScrn=pScrn@entry=0xe52b70) at radeon_kms.c:1560
        xf86_config = 0xeec4f0
        output = <optimized out>
        crtc = 0xeefa10
        o = 0
        c = 0
#4  0x00007f36b48f50cf in RADEONSaveScreen_KMS (pScreen=<optimized out>, mode=1) at radeon_kms.c:1579
        pScrn = 0xe52b70
        unblank = <optimized out>
#5  0x000000000046822e in dixSaveScreens ()
No symbol table info available.
#6  0x000000000057594a in mieqProcessInputEvents ()
No symbol table info available.
#7  0x0000000000477699 in ProcessInputEvents ()
No symbol table info available.
#8  0x000000000043581f in Dispatch ()
No symbol table info available.
#9  0x0000000000439b95 in dix_main ()
No symbol table info available.
#10 0x00007f36b81216b0 in __libc_start_main () from /lib64/libc.so.6
No symbol table info available.
#11 0x0000000000423719 in _start ()
No symbol table info available.