[9fans] pi4 firmware update breaks 9pi, and how to fix it

2019-12-17 Thread Richard Miller
If you're thinking of updating the firmware (fixup*.dat, start*.elf) on a raspberry pi 4, for example to experiment with the (beta) network booting support, watch out! A series of commits by the Pi Foundation on https://github.com/raspberrypi/firmware in September and October managed to mess up 9p

[9fans] Forcing display size on Pi4

2019-12-17 Thread Lyndon Nerenberg
I have a 2K display that Plan9 forces to 1920x1080 resolution. Poking around 9/bcm/screen.c indicates that setting vgasize=WxHxD should force the size, but adding a suitable entry in cmdline.txt just gives me a blank display. Before I dig deeper, is this expected to work? If it is I'll start addi

Re: [9fans] Forcing display size on Pi4

2019-12-17 Thread Richard Miller
> I have a 2K display that Plan9 forces to 1920x1080 resolution. > Poking around 9/bcm/screen.c indicates that setting vgasize=WxHxD > should force the size, but adding a suitable entry in cmdline.txt > just gives me a blank display. > > Before I dig deeper, is this expected to work? Possibly not

Re: [9fans] Forcing display size on Pi4

2019-12-17 Thread Bakul Shah
> On Dec 17, 2019, at 1:31 PM, Richard Miller <9f...@hamnavoe.com> wrote: > >> I have a 2K display that Plan9 forces to 1920x1080 resolution. >> Poking around 9/bcm/screen.c indicates that setting vgasize=WxHxD >> should force the size, but adding a suitable entry in cmdline.txt >> just gives m

Re: [9fans] Forcing display size on Pi4

2019-12-17 Thread hiro
here 4k@60Hz works fine with rpi4. nothing plan9 specific was needed. i copied the fat32 content from raspbian and adjusted the config.txt according to the docs to make it work. 9front release had some firmware (or dtd files, or something) that was either too old or missing ---