On Thu, Jun 9, 2022 at 10:33 PM Stefan Wahren <stefan.wahren@xxxxxxxx> wrote: > > Hi Peter, > > Am 09.06.22 um 13:52 schrieb Peter Robinson: > >>>>> As of Linux 5.18.0, module vc4 apparently isn't working on Raspberry Pi > >>>>> 3B any more. > >>>>> > >>>>> If a monitor is attached to the device, the boot messages show up as > >>>>> usual, but right when KMS starts, the screen turns black. Similarly, the > >>>>> screen also turns black when the module is blacklisted at boot time and > >>>>> loaded from the running system. > >>>>> The problem looks quite similar to the one posted some months ago in [1]. > >>> If I understand you properly, it results in a blank screen if the > >>> monitor is connected, but the system is still responsive? > >>> > >>> If so, it's a very different problem than the link you provided, since > >>> it was occurring when no monitor was connected and resulted in a total > >>> system hang. > >>> > >>>>> Unfortunately, looking through systemd's journal didn't seem to yield > >>>>> any real hint. Nevertheless, the results from grepping vc4 are > >>>> I'm seeing the same issue with vc4 on a RPi3 on 5.18.1 on Fedora so > >>>> can confirm the regression. Maxime would know what might be up here? > >> i assume you are using the downstream DTB? > > In this case it's the one in the Linux kernel (not sure if that's > > upstream or downstream in this context) not the one provided by the > > RPi firmware. > > okay thanks. I tried the kernel config but its huge. Welcome to distro configs. > Is it correct that the issue occurs with your kernel config, but not > with multi_v7_defconfig? I've not tried it, ultimately the distro config is where it's used and the rpi config within that hasn't changed for some time. > > > >> Please provide the version/date of the GPU firmware? > > [ 6.205121] raspberrypi-firmware soc:firmware: Attached to firmware > > from 2022-05-24T13:26:52 > > Which is git f145afc > This is good. I had issues with older firmware which didn't implement > RPI_FIRMWARE_NOTIFY_DISPLAY_DONE. So it must be something different.
