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    SubjectRe: 2.6.37-rc2-git4: Reported regressions 2.6.35 -> 2.6.36
    From
    On Thu, Nov 18, 2010 at 7:47 PM, Mark Lord <kernel@teksavvy.com> wrote:
    > On 10-11-18 06:50 PM, Rafael J. Wysocki wrote:
    >>
    >> This message contains a list of some post-2.6.35 regressions introduced
    >> before
    >> 2.6.36, for which there are no fixes in the mainline known to the tracking
    >> team.
    >> If any of them have been fixed already, please let us know.
    >>
    >> If you know of any other unresolved post-2.6.35 regressions, please let us
    >> know
    >> either and we'll add them to the list.  Also, please let us know if any
    >> of the entries below are invalid.
    >
    >> Bug-Entry       : http://bugzilla.kernel.org/show_bug.cgi?id=21652
    >> Subject         : several problems with intel graphics since 2.6.36
    >> Submitter       : Norbert Preining<preining@logic.at>
    >> Date            : 2010-10-27 14:32 (23 days old)
    >> Message-ID      :<20101027143252.GA8676@gamma.logic.tuwien.ac.at>
    >> References      : http://marc.info/?l=linux-kernel&m=128818998630241&w=2
    >
    > That one is interesting to me.. I suspect it may be the same cause
    > as for https://bugzilla.kernel.org/show_bug.cgi?id=21952
    >
    > I have one of those Samsung (N210) Netbooks here: works fine with 2.6.34 and
    > earlier,
    > but fails to come out of suspend on 2.6.35/2.6.36 (haven't tried 2.6.37).
    >
    > So perhaps add 21952 to the list, or link it to the 21652
    > (kind of amusing how similar the bug numbers are..).
    >
    >
    > My non-Intel graphics notebook (has ATI X1400 graphics) also has a resume
    > regression with 2.6.36.  But it does work fine with 2.6.35 (and earlier,
    > back many years).  As a result, I'm stuck with 2.6.35 for the time being,
    > and lack the time for a concerted debug effort on 2.6.36+ right now.
    >

    Can you bisect? Does this patch help?

    diff --git a/drivers/gpu/drm/radeon/atom.c b/drivers/gpu/drm/radeon/atom.c
    index 8e421f6..05efb5b 100644
    --- a/drivers/gpu/drm/radeon/atom.c
    +++ b/drivers/gpu/drm/radeon/atom.c
    @@ -112,6 +112,7 @@ static uint32_t atom_iio_execute(struct
    atom_context *ctx, int base,
    base += 3;
    break;
    case ATOM_IIO_WRITE:
    + (void)ctx->card->ioreg_read(ctx->card, CU16(base + 1));
    ctx->card->ioreg_write(ctx->card, CU16(base + 1), temp);
    base += 3;
    break;

    Alex

    > Cheers
    > _______________________________________________
    > dri-devel mailing list
    > dri-devel@lists.freedesktop.org
    > http://lists.freedesktop.org/mailman/listinfo/dri-devel
    >
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