On Wed, Apr 10, 2019 at 9:27 AM Hans de Goede <hdego...@redhat.com> wrote: > > Hi, > > On 09-04-19 21:31, Dominik 'Rathann' Mierzejewski wrote: > > Hello, > > > > On Tuesday, 09 April 2019 at 16:44, Hans de Goede wrote: > >> Hi, > >> > >> On 09-04-19 14:05, Patrik Jakobsson wrote: > >>> On Tue, Apr 9, 2019 at 12:20 PM Hans de Goede <hdego...@redhat.com> wrote: > >>>> > >>>> Hi, > >>>> > >>>> On 09-04-19 11:47, Patrik Jakobsson wrote: > >>>>> On Tue, Apr 9, 2019 at 8:51 AM Hans de Goede <hdego...@redhat.com> > >>>>> wrote: > >>>>>> > >>>>>> Some CedarView VBT-s claim that there is a LVDS panel, while there is > >>>>>> none. > >>>>>> Specifically this happens on the Thecus N2800 / N5550 NAS models. > >>>>>> > >>>>>> This commit adds a LVDS blacklist to deal with this and adds an entry > >>>>>> for > >>>>>> the Thecus NAS-es. > >>>>> > >>>>> Hi Hans, > >>>>> Sometimes LVDS can be configured in the BIOS on CDV devices. Can you > >>>>> check that it's not just a bad BIOS configuration first? > >>>> > >>>> I've asked the reporter to test, but even if there is a BIOS option it > >>>> seems that the BIOS default setting is wrong and we cannot expect every > >>>> user to go into the BIOS to fix a wrong BIOS setting. > >>>> > >>>> According to this blogpost, which is about the Linux the device ships > >>>> with: > >>>> https://astroweasel.blogspot.com/2016/02/updating-thecus-n5550-nas-to-report.html > >>>> > >>>> The pre-installed grub config includes 'video=LVDS-1:d' on the kernel > >>>> commandline, so this clearly seems to be a case where the system is just > >>>> shipping with a broken BIOS or at least with default BIOS settings which > >>>> is just as bad. > >>> > >>> I agree that we should try to fix a broken default but are you sure > >>> this will only affect the n5550? IIUC Milstead / Granite Well is an > >>> Intel product / board name and perhaps some of those use LVDS. > >> > >> Milstead is the name of Intel's NAS reference design: > >> > >> https://www.hardwarezone.com.my/tech-news-intel-unveils-milstead-platform-nas-devices > >> > >> I seriously doubt that any NAS-es have a LVDS (laptop/tablet) LCD panel. > >> > >>> Also, if the pre-installed OS solves this on the cmdline then it's > >>> only a problem if the user is trying to install a custom OS on the > >>> device. I would expect such a user to be able to change bios settings. > >>> > >>> I'm not totally against this but not sure about the consequences. Is > >>> there perhaps a better dmi string to match against? > >> > >> No there are no better DMI strings to match against I'm afraid. > > > > I did load default settings in BIOS setup and there's no change in > > behaviour. LVDS gets detected as connected: > > $ cat /sys/class/drm/card0-LVDS-1/status > > connected > > > > Only VGA output is physically connected at the moment. > > To be clear what Dominik means here is that he has a VGA monitor > connected. There is no LVDS panel in this device at all.
Thanks for testing. I dusted off my DN2800MT and tried turning LVDS on/off in the BIOS. With LVDS disabled gma500 reports it as connected. When LVDS is enabled in bios I instead get a connected eDP connector. I'm starting to think that broken VBT parsing might be the actual problem. > > Regards, > > Hans > _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel
