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    SubjectRe: [Regression, post-2.6.37-rc2] Unable to start KDE with 2.6.37-rc3 on Acer Ferrari One
    Date
    On Wednesday, November 24, 2010, Alex Deucher wrote:
    > On Tue, Nov 23, 2010 at 8:45 PM, Rafael J. Wysocki <rjw@sisk.pl> wrote:
    > > On Wednesday, November 24, 2010, Alex Deucher wrote:
    > >> 2010/11/23 Rafael J. Wysocki <rjw@sisk.pl>:
    > >> > On Wednesday, November 24, 2010, Rafael J. Wysocki wrote:
    > >> >> Hi,
    > >> >>
    > >> >> I cannot start KDE with the 2.6.37-rc3 kernel. The X server and display
    > >> >> manager start normally, but when I attempt to log into KDE, it attempts to
    > >> >> start, but then the X apparently crashes and this appears in the dmesg output:
    > >> >>
    > >> >> [ 24.342287] radeon 0000:01:05.0: r600_cs_track_validate_cb offset[0] 0 46097920 4325376 too big
    > >> >> [ 24.342298] radeon 0000:01:05.0: r600_packet3_check:1331 invalid cmd stream 502
    > >> >> [ 24.342304] [drm:radeon_cs_ioctl] *ERROR* Invalid command stream !
    > >> >> [ 24.694106] [drm:drm_mode_getfb] *ERROR* invalid framebuffer id
    > >> >> [ 93.938946] radeon 0000:01:05.0: r600_cs_track_validate_cb offset[0] 0 46097920 4325376 too big
    > >> >> [ 93.938956] radeon 0000:01:05.0: r600_packet3_check:1331 invalid cmd stream 502
    > >> >> [ 93.938962] [drm:radeon_cs_ioctl] *ERROR* Invalid command stream !
    > >> >> [ 94.278050] [drm:drm_mode_getfb] *ERROR* invalid framebuffer id
    > >> >> [ 114.898043] radeon 0000:01:05.0: r600_cs_track_validate_cb offset[0] 0 46097920 4325376 too big
    > >> >> [ 114.898053] radeon 0000:01:05.0: r600_packet3_check:1331 invalid cmd stream 502
    > >> >> [ 114.898058] [drm:radeon_cs_ioctl] *ERROR* Invalid command stream !
    > >> >> [ 115.266113] [drm:drm_mode_getfb] *ERROR* invalid framebuffer id
    > >> >> [ 129.722472] [drm:drm_mode_getfb] *ERROR* invalid framebuffer id
    > >> >> [ 142.984314] radeon 0000:01:05.0: r600_cs_track_validate_cb offset[0] 0 46097920 4325376 too big
    > >> >> [ 142.984324] radeon 0000:01:05.0: r600_packet3_check:1331 invalid cmd stream 502
    > >> >> [ 142.984330] [drm:radeon_cs_ioctl] *ERROR* Invalid command stream !
    > >> >> [ 143.370083] [drm:drm_mode_getfb] *ERROR* invalid framebuffer id
    > >> >>
    > >> >> This doesn't happen with 2.6.37-rc2.
    > >> >
    > >> > Reverting the following commit:
    > >> >
    > >> > commit 16790569eddf4d406a16a65f4750f405fa669c52
    > >> > Author: Alex Deucher <alexdeucher@gmail.com>
    > >> > Date: Sun Nov 14 20:24:35 2010 -0500
    > >> >
    > >> > drm/radeon/kms: fix and unify tiled buffer alignment checking for r6xx/7xx
    > >> >
    > >> > fixes the issue for me (so everyone involved is already in the Cc list ;-)).
    > >> >
    > >>
    > >> Are you sure you've got the right commit?
    > >
    > > Well, as I said, I reverted that particular commit and things started to work.
    > >
    > >> That shouldn't change the calculation that's failing at all. I'd guess it's
    > >> probably one of these:
    > >> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=d33ef52d9db8a36900dd53f2e32db9a521ace259
    > >> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=f30df2fad0c901e74ac9a52a488a54c69a373a41
    > >
    > > I don't know. Perhaps there are some interactions between the two and the
    > > reverted one. I can try reverting these tomorrow if you want me to.
    >
    > Can you try just reverting this patch:
    > http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=d33ef52d9db8a36900dd53f2e32db9a521ace259

    That helps too.

    > I think the real issue is a bug in the 3D driver (probably a flush at
    > the wrong time) that one of these commits exposing.

    Well, that's possible, but unfortunately this is a regression in the kernel still.

    Thanks,
    Rafael


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