On Wed, 23 Oct 2024 at 21:19, Brandon Nielsen via arm <arm@xxxxxxxxxxxxxxxxxxxxxxx> wrote: > > On 10/23/24 2:39 PM, Troy Dawson via arm wrote: > > On Wed, Oct 23, 2024 at 12:16 PM Brandon Nielsen via arm > > <arm@xxxxxxxxxxxxxxxxxxxxxxx <mailto:arm@xxxxxxxxxxxxxxxxxxxxxxx>> wrote: > > > > Hi all, > > > > I just noticed on my Pi 4B+ that display output on the second micro > > HDMI > > port (the one further from the USB-C power supply port) is corrupted. > > The first port is fine. > > > > The corruption is visible as rainbow halos around text during boot, and > > increasingly large areas of corruption after booting to a graphical > > desktop (green dots, color shifts, etc.). > > > > I can confirm this with the Fedora 41 1.3 RCs for both KDE and > > Workstation. > > > > Has anyone else seen this? I'm trying to rule out it just being a > > hardware fault with my unit. > > > > Brandon Nielsen > > > > > > I can confirm that, and thank you very much. > > I had pulled an old monitor off a shelf to test and thought I was having > > monitor problems. > > I read your email, switched display ports on my rpi4b, and now it's working. > > > > Troy Dawson > > > > > > Oddly, I cannot make this happen consistently. My last 2 boots have been > fine on either port. When things are "fine", I can also move the cable > between ports with no issues. > > So far the only thing I have noticed is: > > "fedora kernel: vc4-drm gpu: swiotlb buffer is full (sz: 1146880 bytes), > total 32768 (slots), used 938 (slots)" > > (and similar) appearing intermittently in the logs when the monitor is > misbehaving. Can you try bumping up the CMA reserved memory? In the /boot/efi/config.txt file change the rpi4 "dtoverlay=cma,cma-256" line to 384 or 512 and reboot. Check it's changed with 'dmesg | grep CMA" -- _______________________________________________ arm mailing list -- arm@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to arm-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/arm@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam, report it: https://pagure.io/fedora-infrastructure/new_issue
