On Sat, Jun 26, 2021 at 9:06 AM davide via Xenomai <xenomai@xenomai.org> wrote:
> > > Hi, it is the first time I ask for an help on this mailing list. > My > setup: > -Raspberry Pi 4, 4gb ram (forced to 3gb) running debian buster > 64bit. > > pi@picat:~ $ uname -a > Linux picat 4.19.126-v8-xeno3+ #1 SMP > PREEMPT Wed Mar 24 12:53:24 +07 2021 aarch64 GNU/Linux > > pi@picat:~ $ > hostnamectl > > ...cut... > Operating System: Debian GNU/Linux 10 (buster) > > Kernel: Linux 4.19.126-v8-xeno3+ > Architecture: arm64 > > - two HDMI > identical monitor connected . 1920x1080 60Hz 148.6 MHz clock. > > My > propblem: > on a clean raspbian 64bit, with 5.x kernel both monitors work > as expected. > I'm working on a prebuilt image to use as an Ethercat > Master, Picat4, from simplerobot.org, which has this kernel, and what > happens is that at booting both monitors start, I see booting info on > second monitor for 2-3 seconds, after that image get frozen on the > second monitor and the first starts as expected with the system running > fine. > > this is an extract of dmesg: > > pi@picat:~ $ dmesg | grep fb > [ > 0.000000] Kernel command line: coherent_pool=1M 8250.nr_uarts=0 cma=64M > bcm2708_fb.fbwidth=1920 bcm2708_fb.fbheight=1080 bcm2708_fb.fbswap=1 > smsc95xx.macaddr=DC:A6:32:F5:24:DE vc_mem.mem_base=0x3ec00000 > vc_mem.mem_size=0x40000000 console=ttyS0,115200 console=tty1 > root=PARTUUID=84c8ffd9-02 rootfstype=ext4 elevator=deadline > fsck.repair=yes rootwait quiet splash plymouth.ignore-serial-consoles > isolcpus=2,3 xenomai.supported_cpus=0xC > [ 0.172711] pci_bus 0000:00: > root bus resource [mem 0x600000000-0x603ffffff] (bus address > [0xf8000000-0xfbffffff]) > [ 0.176577] bcm2708_fb soc:fb: FB found 2 > display(s) > [ 0.209547] bcm2708_fb soc:fb: Registered framebuffer for > display 0, size 1920x1080 > [ 0.233066] bcm2708_fb soc:fb: Registered > framebuffer for display 1, size 1920x1080 > > from those commands I confirm > monitors are recognized: > > pi@picat:~ $ tvservice -l > 2 attached > device(s), display ID's are : > Display Number 2, type HDMI 0 > Display > Number 7, type HDMI 1 > pi@picat:~ $ tvservice -v 2 -s > state 0xa [HDMI CEA > (16) RGB lim 16:9], 1920x1080 @ 60.00Hz, progressive > pi@picat:~ $ > tvservice -v 7 -s > state 0xa [HDMI CEA (16) RGB lim 16:9], 1920x1080 @ > 60.00Hz, progressive > > ...and 2 framebuffers are created: > > pi@picat:~ $ > ls /dev/fb* > /dev/fb0 /dev/fb1 > > BUT xrandr give me this: > > pi@picat:~ $ > xrandr > xrandr: Failed to get size of gamma for output default > Screen 0: > minimum 1920 x 1080, current 1920 x 1080, maximum 1920 x 1080 > default > connected 1920x1080+0+0 0mm x 0mm > 1920x1080 0.00* > > only one > monitor... > > I know that's a Raspberry, and I have to expect strange > behave, but it looks promising that at booting both monitors work, > so.. > > Can you point me in the right direction to look where, when and > why the second monitor stops to work? > > Thanks, Davide. > > > > > Con Tiscali Mobile Smart 70 hai 70 GB in 4G, minuti illimitati e 100 SMS a > soli 7,99€ al mese http://tisca.li/Smart70 > Hi, Are you using ipipe or dovetail? This may not be a xenomai issue, how do you build your kernel? Thanks Greg > >
