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  • No-backfill still needed?

    I was thinking of reinstalling Ubuntu 9.10 and was wondering if the no-backfill X-server patch was still needed for "a lag free experience with Compiz" if I use Catalyst 10.1 together with my HD4870?

  • #2
    Not the backfill, but the newer backclear patch is needed.

    I hear this problem is going to get fixed in a future Catalyst driver release

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    • #3
      Ah, silly me. I was actually thinking of the backclear patch :P

      Thanks.

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      • #4
        Here on opensuse 11.2 the backclear patch is still needed.

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        • #5
          Originally posted by d2kx View Post
          Not the backfill, but the newer backclear patch is needed.

          I hear this problem is going to get fixed in a future Catalyst driver release

          A new 2D acceleration mechanism has gone into the 10.2 and 10.3 betas and is in testing. Supposedly it improves performance under composite window managers, but I haven't been able to test it due to unrelated issues in the drivers. They seem to be targeting Compiz, but I expect kwin will also see improvements. Hopefully everything pans out in the end.

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          • #6
            FYI I just installed ubuntu 10.04 with the catalyst drivers v10.3 which came out just yesterday and the no-backfill problem is still there...

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            • #7
              You probably want the backclear patch, not the no-backfill patch.

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              • #8
                Originally posted by bridgman View Post
                You probably want the backclear patch, not the no-backfill patch.
                why are u saying that? I have exactly the same issue with maximizing/minimizing windows in compiz

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                • #9
                  Are you using the backclear patch ?

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                  • #10
                    It is still needed unless you enable this new 2D acceleration method. It's called 'Direct2D'
                    1. Kill the x server
                    2. Open /etc/ati/amdpcsdb, and under the section [AMDPCSROOT/SYSTEM/DDX]
                    add:
                    Direct2DAccel=STRUE
                    3. Reboot (just in case)

                    It's still on testing, but its getting pretty stable, at least for me.

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                    • #11
                      Here's the bug and at the end of the comments Alf Gaida links to his PPA with a patched xserver-xorg-core that seems to do the tricks.

                      Still, it's pretty annoying having to do this just to not get a 1 second freeze every time I maximize or unmaximize a window.

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                      • #12
                        Originally posted by ungoliant View Post
                        It is still needed unless you enable this new 2D acceleration method. It's called 'Direct2D'
                        1. Kill the x server
                        2. Open /etc/ati/amdpcsdb, and under the section [AMDPCSROOT/SYSTEM/DDX]
                        add:
                        Direct2DAccel=STRUE
                        3. Reboot (just in case)

                        It's still on testing, but its getting pretty stable, at least for me.
                        Thanks for the tip! That did the trick for me!

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                        • #13
                          Originally posted by latebeat View Post
                          why are u saying that? I have exactly the same issue with maximizing/minimizing windows in compiz
                          @all: Bridgman was right. The no-backfill-patch was the first try to solve the described ATI (better xserver) Problems. You can read about it at the begin of comments in launchpad bug #351186. Later came the no-backclear-patch without the glitches described at launchpad. I apply it yesterday to the lucid xserver-1.7.6...ntu7. But you can also search at Arch AUR or at Fedora. In this time i run a 10.4 with a 2.6.33 i686 Kernel with a x 1.8.0.1 on Arch without problems.

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                          • #14
                            Originally posted by albatorsk View Post
                            Still, it's pretty annoying having to do this just to not get a 1 second freeze every time I maximize or unmaximize a window.
                            Do you think it's funny for me doing this work for 9.10 and 10.04? Maybe after the planned patchday on May 15-16 within Ubuntu we get it in the upstream and the people at X.org react. I think it should be standard. I have tested the patched Xserver with Intel G43 and Nvidia 7300GT and 7600GTS without problems. More tests follow, but not by me because the lack of Hardware .

                            BTW, it isn't ATIs fault, but the first thing i do in any new distro i try, i had to look for an patched xserver or patch it by myself. I think, it is the time X.org has to move.

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                            • #15
                              Originally posted by agaida View Post
                              @all: Bridgman was right. The no-backfill-patch was the first try to solve the described ATI (better xserver) Problems. You can read about it at the begin of comments in launchpad bug #351186. Later came the no-backclear-patch without the glitches described at launchpad. I apply it yesterday to the lucid xserver-1.7.6...ntu7. But you can also search at Arch AUR or at Fedora. In this time i run a 10.4 with a 2.6.33 i686 Kernel with a x 1.8.0.1 on Arch without problems.
                              Well can you point out any links on how to download and apply the patch that you're saying? What's the benefit over the no-backfill patched xserver since minimize/maximize seems to be working fine now?

                              Also can you or someone tell me how to go back to the normal xserver after using a ppa to get the no-backfill patched one?

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