> I've now tried a clean(er) install on the system, and still have this problem. Essentially, what I did was
>
> Download "Fedora Minimal" and write it to the SD card.
> Boot up the system in text mode
> dnf groupinstall MATE base-x
> systemctl set-default graphical-target
>
> After this, I have a similar problem. Somehow the colours don't look quite as bad this time, but the resolution is clearly not right. xrandr reports
>
> No, wait. The problem is actually intermittent. Sometimes everything works (after a reboot), and I just found that when it does, I have
We've found the upstream driver, vs the one that is downstream that a
lot of other distros seem to use is quite finicky with some devices, I
would try swapping out your HDMI cable, that has fixed detection
issues for a lot of people.
> $ ls /dev/dri/
> by-path card0 renderD128
>
> $ ls /sys/class/drm
> card0 card0-HDMI-A-1 renderD128
> card0-Composite-1 card0-Writeback-1 version
>
> In cases where I get the problem, on the other hand, /dev/dri is missing, and /sys/class/drm only contains the version file.
>
> - Toralf
>
>
> Screen 0: minimum 1824 x 984, current 1824 x 984, maximum 1824 x 984
> default connected 1824x984+0+0 0mm x 0mm
> 1824x984 77.00
>
> I'd really like to track this down further to a component the may cause the issue (or log that could tell me what's wrong), but quite frankly, I don't know where to start looking. One clue, though, I installed and ran "monitor-edid", and it said:
>
> [toralf@lille-hjelper ~]$ sudo monitor-edid
> [toralf@lille-hjelper ~]$
>
> Yep, that's right. Absolutely nothing. In earlier releases, it has given me actual data for the display.
>
> - Toralf
>
>
> On 26/03/2020 19:39, Peter Robinson wrote:
>
> I have a Raspberry Pi 3B running Fedora AAarch connected to my TV.
>
> After installed the latest version 31 updates, the display went weird on
> me. Monitor preferences list an "unknown" monitor with resolution
> 1824x984 and refresh rate 77 Hz, and colours are all wrong. What should
> be red or orange is blue, blue is red or brown, and I'm not really sure
> what everything else I see on the screen is supposed to look like, but
> the greens may be more or less right.
>
> Any idea what's going on?
>
> No, but then I've not ran F-31 on a RPi for a month or two, I tend to
> move to dev releases pretty quickly and don't regularly use desktop
> UXes in testing.
>
> First question is what updates were applied, the most likely
> candidates are kernel and mesa. If you reboot into the previous kernel
> does it start working again? How long between the updates, was it
> days/weeks/months since you last updated and rebooted?
>
> I'm using the MATE desktop.
>
> Custom image? Anything else custom or did you start with
> minimal/workstation/xfce and cross grade?
>
> If I connect my CentOS 7 laptop to the same HDMI port using the same
> cable, everything seems just fine.
>
> Well that's a mostly irrelevant comparison because none of the
> software is anywhere near Fedora.
>
>
>
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