On Thu, May 16, 2013 at 07:52:12AM +0300, Tomi Valkeinen wrote: > On 15/05/13 20:18, Aaro Koskinen wrote: > > Is it expected that after boot you get 0 brightness i.e. a seemingly > > blank display on N900 with 3.10-rc1? > > There were some small changes merged in v3.10 related to acx's > backlight, but they were removing dead code so I don't see how those > could affect... [...] > So what comes to my mind is that either the model is detected wrong, > or the acx565akm_get_actual_brightness() which reads the current BL from > the panel happens to return 0, either because of an error, or because > the bootloader has set the BL to 0. > > But why either of those would've changed with v3.10... No idea... The panel is detected and probed correctly. So something else is wrong. It's not a bootloader issue, because booting 3.9 right after 3.10-rc1 makes the display work again correctly. So I bisected and it points to: commit a2797beadfcb5a0974a30929b613b4d1adb023d1 Author: Jon Hunter <jon-hunter@xxxxxx> Date: Thu Apr 4 15:16:15 2013 -0500 gpio/omap: force restore if context loss is not detectable When I revert that commit from 3.10-rc1, the display works again as expected. A. -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
