On Wed, May 29, 2019 at 01:22:30PM +0300, Jani Nikula wrote: > On Wed, 29 May 2019, Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxx> wrote: > > On Tue, 28 May 2019, Jani Nikula wrote: > > > >> On Mon, 27 May 2019, Ashutosh Dixit <ashutosh.dixit@xxxxxxxxx> wrote: > >> > On Sun, 26 May 2019 12:50:51 -0700, Ilpo Järvinen wrote: > >> >> > >> >> Hi all, > >> >> > >> >> I've a workstation which has internal VGA that is detected as AST 2400 and > >> >> with it EDID has been always quite flaky (except for some time it worked > >> >> with 4.14 long enough that I thought the problems would be past until the > >> >> problems reappeared also with 4.14). Thus, I've provided manually the EDID > >> >> that I extracted from the monitor using other computer (the monitor itself > >> >> worked just fine on the earlier computer so it is likely fine). > >> >> > >> >> I setup the manual EDID using drm_kms_helper.edid_firmware, however, > >> >> after upgrading to 4.19.45 it stopped working (no "Got external EDID base > >> >> block" appears in dmesg, the text mode is kept in the lower res mode, and > >> >> Xorg logs no longer dumps the EDID info like it did with 4.14). So I guess > >> >> the EDID I provided manually on the command line is not correctly put into > >> >> use with 4.19+ kernels. > >> >> > >> >> The 4.19 dmesg indicated that drm_kms_helper.edid_firmware is deprecated > >> >> so I also tested with drm.edid_firmware it suggested as the replacement > >> >> but with no luck (but I believe also the drm_kms_helper one should have > >> >> worked as it was only "deprecated"). > >> >> > >> >> I also tried 5.1.2 but it did not work any better (and with it also tried > >> >> removing all the manual *.edid_firmware from the command line so I still > >> >> need to provide one manually to have it reliable working it seems). > >> > > >> > I believe there is a bug already tracking this, here: > >> > > >> > https://bugs.freedesktop.org/show_bug.cgi?id=107583 > >> > >> Ilpo, does video=VGA-1:e command-line option work around the problem for > >> you? > > > > Yes it does; together with the modeline stuff for Xorg (after reading the > > referenced bug report I realized I can fix the X side with it). So I now > > have the desired modes/resolutions in use. Thank you all! > > Great! It should be enough to just have the replacement firmware EDID > for the modes, as long as you have an EDID that represents the > capabilities of the display. The modelines for Xorg should not be > needed. > > BR, > Jani. > Ilpo, I have a patch which I think will fix this problem without needing the video=VGA-1:e command-line option work around. Will you be able to help me with testing it on your system? Thank You! Harish. > > -- > Jani Nikula, Intel Open Source Graphics Center > _______________________________________________ > dri-devel mailing list > dri-devel@xxxxxxxxxxxxxxxxxxxxx > http://lists.freedesktop.org/mailman/listinfo/dri-de�;[ _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
