As you see it's about radeon (look before last line)
jozio@ementos-desktop:~$ celestia Initializing ARB vertex programs . . . Loading ARB vertex program: shaders/diffuse_arb.vp Loading ARB vertex program: shaders/specular_arb.vp Loading ARB vertex program: shaders/haze_arb.vp Loading ARB vertex program: shaders/bumpdiffuse_arb.vp Loading ARB vertex program: shaders/bumphaze_arb.vp Loading ARB vertex program: shaders/shadowtex_arb.vp Loading ARB vertex program: shaders/diffuse_texoff_arb.vp Loading ARB vertex program: shaders/rings_arb.vp Loading ARB vertex program: shaders/ringshadow_arb.vp Loading ARB vertex program: shaders/night_arb.vp Loading ARB vertex program: shaders/glossmap_arb.vp Loading ARB vertex program: shaders/diffuse2_arb.vp Loading ARB vertex program: shaders/haze2_arb.vp Loading ARB vertex program: shaders/diffuse_texoff2_arb.vp Loading ARB vertex program: shaders/specular2_arb.vp Loading ARB vertex program: shaders/night2_arb.vp Loading ARB vertex program: shaders/star_arb.vp Loading ARB vertex program: shaders/ell_galaxy_arb.vp All ARB vertex programs loaded successfully. render path: 3 bo(0xa447f90, 65536) is mapped (-1) can't valide it. validated 0xa447f90 [0xE07C2000, 0xE07D2000] celestia: radeon_dma.c:210: radeonRefillCurrentDmaRegion: Assertion `dma_bo->bo->cref == 1' failed. Aborted
As you see it's about radeon (look before last line)
jozio@ementos- desktop: ~$ celestia diffuse_ arb.vp specular_ arb.vp bumpdiffuse_ arb.vp bumphaze_ arb.vp shadowtex_ arb.vp diffuse_ texoff_ arb.vp rings_arb. vp ringshadow_ arb.vp night_arb. vp glossmap_ arb.vp diffuse2_ arb.vp haze2_arb. vp diffuse_ texoff2_ arb.vp specular2_ arb.vp night2_ arb.vp ell_galaxy_ arb.vp rentDmaRegion: Assertion `dma_bo->bo->cref == 1' failed.
Initializing ARB vertex programs . . .
Loading ARB vertex program: shaders/
Loading ARB vertex program: shaders/
Loading ARB vertex program: shaders/haze_arb.vp
Loading ARB vertex program: shaders/
Loading ARB vertex program: shaders/
Loading ARB vertex program: shaders/
Loading ARB vertex program: shaders/
Loading ARB vertex program: shaders/
Loading ARB vertex program: shaders/
Loading ARB vertex program: shaders/
Loading ARB vertex program: shaders/
Loading ARB vertex program: shaders/
Loading ARB vertex program: shaders/
Loading ARB vertex program: shaders/
Loading ARB vertex program: shaders/
Loading ARB vertex program: shaders/
Loading ARB vertex program: shaders/star_arb.vp
Loading ARB vertex program: shaders/
All ARB vertex programs loaded successfully.
render path: 3
bo(0xa447f90, 65536) is mapped (-1) can't valide it.
validated 0xa447f90 [0xE07C2000, 0xE07D2000]
celestia: radeon_dma.c:210: radeonRefillCur
Aborted