I run Debian 8.1 on an iMac G3 500 from 2001. The computer has an ATI Rage 128 PRO graphics card. In order for X to start it needs to know the horizontal sync frequencies and the vertical refresh rates supported by the CRT monitor:$ cat /etc/X11/xorg.confSection Device        Identifier Configured Video Device        Driver r128EndSectionSection Monitor        Identifier Configured Monitor        HorizSync 58-62        VertRefresh 75-117EndSectionSection Screen        Identifier Default Screen        Monitor Configured Monitor        Device Configured Video DeviceEndSectionWith the above configuration file, X runs but the 2d performance is very slow; moving windows, for instance, is really lagging. According to the manual page for the r128 driver it contains full support for hardware acceleration of drawing primitives. My question is, basically, what settings do I need to add to get hardware acceleration? How can I tell whether hardware acceleration is in use or not?Update 2015-07-15:Here is the content of /var/log/Xorg.0.log: http://textuploader.com/asl1oUpdate 2015-07-25:Here is the output of the command dmesg: http://textuploader.com/addvxUpdate 2015-08-06:The strange thing is that although Xorg.0.log says[    84.669] (WW) R128(0): Direct rendering disabledthe glxinfo command thinks it's enabled:$ glxinfo | headname of display: :0.0display: :0  screen: 0direct rendering: Yesserver glx vendor string: SGIserver glx version string: 1.4server glx extensions:    GLX_ARB_multisample, GLX_EXT_import_context, GLX_EXT_texture_from_pixmap,     GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_MESA_copy_sub_buffer,     GLX_OML_swap_method, GLX_SGIS_multisample, GLX_SGIX_fbconfig,     GLX_SGIX_pbuffer, GLX_SGI_make_current_read
Getting hardware accellerated 2d graphics with ATI card
debian;xorg;ati;amd graphics