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    SubjectSuspend to RAM fault in VT when resuming

    I've chased one of the 'Suspend to RAM' resume problems to a specific
    line in drivers/char/vt.c, see attached 2.6.21-rc3 diff with
    TRACE_RESUME() instrumentation. The macro scr_writew resolves to '*addr
    = val', which appears to be causing the problem. I've verified that the
    pointer is not NULL, but don't know if its really valid. Its pretty
    tough to tell what is happening, but on a Dell XPS it just hangs. A Dell
    Precision blinks the keyboard lights.

    Since I don't know anything about video programming, I though perhaps
    you might have an opinion.

    Tim Gardner
    diff --git a/drivers/char/vt.c b/drivers/char/vt.c
    index c3f8e38..43a0904 100644
    --- a/drivers/char/vt.c
    +++ b/drivers/char/vt.c
    @@ -98,6 +98,7 @@
    #include <linux/pm.h>
    #include <linux/font.h>
    #include <linux/bitops.h>
    +#include <linux/resume-trace.h>

    #include <asm/io.h>
    #include <asm/system.h>
    @@ -2263,7 +2264,9 @@ static void vt_console_print(struct console *co, const char *b, unsigned count)
    if (c == 10 || c == 13)
    scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos);
    if (myx == vc->vc_cols - 1) {
    vc->vc_need_wrap = 1;
     \ /
      Last update: 2007-03-13 22:11    [W:0.020 / U:35.308 seconds]
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