https://bugs.freedesktop.org/show_bug.cgi?id=110500

            Bug ID: 110500
           Summary: X-Server crashes - GL error: GL_OUT_OF_MEMORY in
                    glTexSubImage
           Product: Mesa
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: Drivers/DRI/nouveau
          Assignee: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
          Reporter: wixbisce-jFQLhMmostjmZLV5cmOKUwC/G2K4zDHf@public.gmane.org
        QA Contact: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org

I try to convert someone from Windows to Linux. I installed Kubuntu 18.04.2 .
Suddenly while using it the screen went black and afterwards i had the login
screen.

cat /var/log/Xorg.0.log.old

[  2309.613] (EE) glamor0: GL error: GL_OUT_OF_MEMORY in glTexSubImage
[  2309.613] (WW) glamor: Failed to allocate 455x25 FBO due to
GL_OUT_OF_MEMORY.
[  2309.613] (WW) glamor: Expect reduced performance.
[  2331.150] (EE) glamor0: GL error: GL_OUT_OF_MEMORY in glTexSubImage
[  2331.150] (EE) 
[  2331.150] (EE) Backtrace:
[  2331.151] (EE) 0: /usr/lib/xorg/Xorg (OsLookupColor+0x139) [0x561f602bb459]
[  2331.151] (EE) 1: /lib/x86_64-linux-gnu/libpthread.so.0 (funlockfile+0x50)
[0x7fa3b600a8df]
[  2331.151] (EE) 2: /usr/lib/xorg/modules/libglamoregl.so
(glamor_get_pixmap_texture+0x7d) [0x7fa3b2a6155d]
[  2331.152] (EE) 3: /usr/lib/xorg/modules/libglamoregl.so
(glamor_create_gc+0x78f4) [0x7fa3b2a73644]
[  2331.152] (EE) 4: /usr/lib/xorg/modules/libglamoregl.so
(glamor_create_gc+0x7caf) [0x7fa3b2a73d6f]
[  2331.152] (EE) 5: /usr/lib/xorg/modules/libglamoregl.so
(glamor_create_gc+0x8668) [0x7fa3b2a74888]
[  2331.152] (EE) 6: /usr/lib/xorg/modules/libglamoregl.so
(glamor_create_gc+0xa26f) [0x7fa3b2a7807f]
[  2331.152] (EE) 7: /usr/lib/xorg/Xorg (DamageRegionAppend+0x6c6)
[0x561f6023e996]
[  2331.153] (EE) 8: /usr/lib/xorg/modules/libglamoregl.so
(glamor_create_gc+0x1110f) [0x7fa3b2a8645f]
[  2331.153] (EE) 9: /usr/lib/xorg/Xorg (AddTraps+0x423d) [0x561f602375ed]
[  2331.153] (EE) 10: /usr/lib/xorg/Xorg (SendErrorToClient+0x368)
[0x561f6015e498]
[  2331.153] (EE) 11: /usr/lib/xorg/Xorg (InitFonts+0x3c8) [0x561f60162478]
[  2331.154] (EE) 12: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xe7)
[0x7fa3b5c21b97]
[  2331.154] (EE) 13: /usr/lib/xorg/Xorg (_start+0x2a) [0x561f6014c13a]
[  2331.154] (EE) 
[  2331.154] (EE) Segmentation fault at address 0x0
[  2331.154] (EE) 
Fatal server error:
[  2331.154] (EE) Caught signal 11 (Segmentation fault). Server aborting


OS: Kubuntu 18.04.2 LTS release.
Hardware: 8GB RAM, Nvidia 9500 passive cooled GPU

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