Hi Peter(s) On Wed, Jun 08, 2022 at 02:10:19PM +0100, Peter Robinson wrote: > Hi Peter, > > Adding Stefan and Maxime > > > 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 tested on 5.18 on my 3B and it works well. Could you paste your kernel configuration and config.txt somewhere? > > → 5.17.1 > > > kernel: vc4-drm soc:gpu: bound 3f400000.hvs (ops vc4_hvs_ops [vc4]) > > > kernel: rc rc0: vc4 as /devices/platform/soc/3f902000.hdmi/rc/rc0 > > > kernel: input: vc4 as /devices/platform/soc/3f902000.hdmi/rc/rc0/input0 > > > kernel: vc4-drm soc:gpu: bound 3f902000.hdmi (ops vc4_hdmi_ops [vc4]) > > > kernel: vc4-drm soc:gpu: bound 3f806000.vec (ops vc4_vec_ops [vc4]) > > > kernel: vc4-drm soc:gpu: bound 3f004000.txp (ops vc4_txp_ops [vc4]) > > > kernel: vc4-drm soc:gpu: bound 3f206000.pixelvalve (ops vc4_crtc_ops > > [vc4]) > > > kernel: vc4-drm soc:gpu: bound 3f207000.pixelvalve (ops vc4_crtc_ops > > [vc4]) > > > kernel: vc4-drm soc:gpu: bound 3f807000.pixelvalve (ops vc4_crtc_ops > > [vc4]) > > > kernel: vc4-drm soc:gpu: bound 3fc00000.v3d (ops vc4_v3d_ops [vc4]) > > > kernel: fb0: switching to vc4 from simple > > > kernel: [drm] Initialized vc4 0.0.0 20140616 for soc:gpu on minor 0 > > > kernel: vc4-drm soc:gpu: [drm] fb0: vc4drmfb frame buffer device > > > systemd-logind[338]: Watching system buttons on /dev/input/event0 (vc4) > > → 5.18.0 > > > kernel: fb0: switching to vc4 from simple > > > kernel: vc4-drm soc:gpu: bound 3f400000.hvs (ops vc4_hvs_ops [vc4]) > > > kernel: rc rc0: vc4 as /devices/platform/soc/3f902000.hdmi/rc/rc0 > > > kernel: input: vc4 as /devices/platform/soc/3f902000.hdmi/rc/rc0/input0 > > > kernel: vc4-drm soc:gpu: bound 3f902000.hdmi (ops vc4_hdmi_ops [vc4]) > > > kernel: vc4-drm soc:gpu: bound 3f806000.vec (ops vc4_vec_ops [vc4]) > > > kernel: vc4-drm soc:gpu: bound 3f004000.txp (ops vc4_txp_ops [vc4]) > > > kernel: vc4-drm soc:gpu: bound 3f206000.pixelvalve (ops vc4_crtc_ops > > [vc4]) > > > kernel: vc4-drm soc:gpu: bound 3f207000.pixelvalve (ops vc4_crtc_ops > > [vc4]) > > > kernel: vc4-drm soc:gpu: bound 3f807000.pixelvalve (ops vc4_crtc_ops > > [vc4]) > > > kernel: vc4-drm soc:gpu: bound 3fc00000.v3d (ops vc4_v3d_ops [vc4]) > > > kernel: [drm] Initialized vc4 0.0.0 20140616 for soc:gpu on minor 0 > > > kernel: vc4-drm soc:gpu: [drm] fb0: vc4drmfb frame buffer device > > > systemd-logind[337]: Watching system buttons on /dev/input/event0 (vc4) Yeah, it doesn't look that different. Maxime
Attachment:
signature.asc
Description: PGP signature
