On 16/04/2020 11:53, Peter Robinson wrote:
>> 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.
I'll try that, but I need to get hold of a new cable first.
But note: /dev/dri is missing when I experience the problems. Can a poor
connection actually cause that?
What power supply are you using? What's it rated at?
> - Toralf
> >> $ 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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