diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2010-07-28 13:41:41 +0100 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2010-07-28 13:42:15 +0100 |
| commit | b68d4fcab5d671946c187947f5d00aedff939852 (patch) | |
| tree | 8f30097f00ec1822a28455d9330feaf13b1b7f62 /src | |
| parent | 938ef4eaec0e406e198105d866f6d2a1be5e0ef8 (diff) | |
drmmode: Only treat a backlight as connected if it has a non-zero max
Optimistically might help
https://bugs.freedesktop.org/show_bug.cgi?id=29273
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Diffstat (limited to 'src')
| -rw-r--r-- | src/drmmode_display.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/src/drmmode_display.c b/src/drmmode_display.c index 546b8d59..fd433221 100644 --- a/src/drmmode_display.c +++ b/src/drmmode_display.c @@ -91,7 +91,7 @@ typedef struct { drmmode_prop_ptr props; void *private_data; int dpms_mode; - char *backlight_iface; + const char *backlight_iface; int backlight_active_level; int backlight_max; xf86OutputPtr output; @@ -106,7 +106,7 @@ drmmode_output_dpms(xf86OutputPtr output, int mode); /* * List of available kernel interfaces in priority order */ -static char *backlight_interfaces[] = { +static const char *backlight_interfaces[] = { "asus-laptop", "eeepc", "thinkpad_screen", @@ -240,11 +240,13 @@ drmmode_backlight_init(xf86OutputPtr output) sprintf(path, "%s/%s", BACKLIGHT_CLASS, backlight_interfaces[i]); if (!stat(path, &buf)) { drmmode_output->backlight_iface = backlight_interfaces[i]; - xf86DrvMsg(output->scrn->scrnIndex, X_INFO, - "found backlight control interface %s\n", path); drmmode_output->backlight_max = drmmode_backlight_get_max(output); drmmode_output->backlight_active_level = drmmode_backlight_get(output); - return; + if (drmmode_backlight_get_max(output)) { + xf86DrvMsg(output->scrn->scrnIndex, X_INFO, + "found backlight control interface %s\n", path); + return; + } } } drmmode_output->backlight_iface = NULL; |