Am 25.06.2012 um 17:53 schrieb Takashi Iwai:
Looking at the EDID data, the problem is likely that your monitor doesn't give the proper preferred mode. What does xrandr output show?
,---- | Screen 0: minimum 320 x 200, current 1280 x 1024, maximum 8192 x 8192 | DVI-I-1 connected 1280x1024+0+0 (normal left inverted right x axis y axis) 376mm x 301mm | 1280x1024 75.0* 60.0 | 1024x768 75.1 75.0 70.1 60.0 | 832x624 74.6 | 800x600 72.2 75.0 60.3 56.2 | 640x480 72.8 75.0 66.7 60.0 59.9 | VGA-1 disconnected (normal left inverted right x axis y axis) `----
I should note that the monitor is actually connected via VGA, not DVI. This seems to be similar to https://bugs.freedesktop.org/50830, but since it never caused any real problems for me, I didn't bother.
And, does the patch below help?
Somewhat: at least I get 1280x1024 again, but at 60 rather than 75 Hz. The xrandr command shows various bogus modes.
,---- | Screen 0: minimum 320 x 200, current 1280 x 1024, maximum 8192 x 8192 | DVI-I-1 connected 1280x1024+0+0 (normal left inverted right x axis y axis) 376mm x 301mm | 1280x1024 60.0*+ 75.0 | 1680x945 60.0 | 1400x1050 60.0 | 1600x900 60.0 | 1440x900 75.0 59.9 | 1280x960 60.0 | 1366x768 60.0 | 1360x768 60.0 | 1280x800 74.9 59.8 | 1152x864 75.0 | 1280x768 74.9 59.9 | 1024x768 75.1 75.0 70.1 60.0 | 1024x576 60.0 | 832x624 74.6 | 800x600 72.2 75.0 60.3 56.2 | 848x480 60.0 | 640x480 75.0 72.8 72.8 66.7 60.0 59.9 | VGA-1 disconnected (normal left inverted right x axis y axis) `----
Cheers, Sven
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index 5873e48..dab8580 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -116,6 +116,7 @@ static struct edid_quirk {
/* Proview AY765C */ { "PTS", 765, EDID_QUIRK_FIRST_DETAILED_PREFERRED },
{ "PTS", 793, EDID_QUIRK_FIRST_DETAILED_PREFERRED },
/* Samsung SyncMaster 205BW. Note: irony */ { "SAM", 541, EDID_QUIRK_DETAILED_SYNC_PP },
@@ -1404,7 +1405,9 @@ do_detailed_mode(struct detailed_timing *timing, void *c) if (!newmode) return;
if (closure->preferred)
if (closure->preferred ||((closure->quirks & EDID_QUIRK_FIRST_DETAILED_PREFERRED) &&!closure->modes)) newmode->type |= DRM_MODE_TYPE_PREFERRED;drm_mode_probed_add(closure->connector, newmode);