Alex,

I applied the changes you suggested here and got the demo to boot in QEMU just as you had. It's super slow and laggy thanks to my machine but it does seem to work.

Interestingly adding your other changes (to switch to the fb_boot_drv) causes QEMU to at least get to outputting "Booting Genode on seL4" only to stop there. This is the output of that particular run if interested.

```
spawn qemu-system-x86_64 -no-kvm -display sdl -serial mon:stdio -m 512 -cdrom var/run/demo.iso -machine q35
qemu-system-x86_64: warning: TCG doesn't support requested feature: CPUID.01H:ECX.vmx [bit 5]
Bender: Hello World.

Boot config: parsing cmdline 'sel4 disable_iommu'
Boot config: console_port = 0x3f8
Boot config: debug_port = 0x3f8
Boot config: disable_iommu = true
  module #0: start=0xf5ff000 end=0xffff330 size=0xa00330 name='image.elf'
    Physical Memory Region from 0 size 9fc00 type 1
    Physical Memory Region from 9fc00 size 400 type 2
    Physical Memory Region from f0000 size 10000 type 2
    Physical Memory Region from 100000 size 1fedf000 type 1
Adding physical memory region 0x100000-0x1ffdf000
    Physical Memory Region from 1ffdf000 size 21000 type 2
    Physical Memory Region from b0000000 size 10000000 type 2
    Physical Memory Region from fed1c000 size 4000 type 2
    Physical Memory Region from fffc0000 size 40000 type 2
Got framebuffer info in multiboot2. Current video mode is at physical address=b8000 pitch=160 resolution=80x25@16 type=2
Detected 1 boot module(s):
Kernel loaded to: start=0x200000 end=0xaa5000 size=0x8a5000 entry=0x201209
ACPI: RSDT paddr=0x1ffe20c5
ACPI: RSDT vaddr=0x1ffe20c5
ACPI: FADT paddr=0x1ffe1ee5
ACPI: FADT vaddr=0x1ffe1ee5
ACPI: FADT flags=0x84a5
ACPI: MADT paddr=0x1ffe1fd9
ACPI: MADT vaddr=0x1ffe1fd9
ACPI: MADT apic_addr=0xfee00000
ACPI: MADT flags=0x1
ACPI: MADT_APIC apic_id=0x0
ACPI: MADT_IOAPIC ioapic_id=0 ioapic_addr=0xfec00000 gsib=0
ACPI: MADT_ISO bus=0 source=0 gsi=2 flags=0x0
ACPI: MADT_ISO bus=0 source=5 gsi=5 flags=0xd
ACPI: MADT_ISO bus=0 source=9 gsi=9 flags=0xd
ACPI: MADT_ISO bus=0 source=10 gsi=10 flags=0xd
ACPI: MADT_ISO bus=0 source=11 gsi=11 flags=0xd
ACPI: 1 CPU(s) detected
ELF-loading userland images from boot modules:
size=0x186a000 v_entry=0x2000018 v_start=0x2000000 v_end=0x386a000 p_start=0x10000000 p_end=0x1186a000
Moving loaded userland images to final location: from=0x10000000 to=0xaa5000 size=0x186a000
Starting node #0 with APIC ID 0
Mapping kernel window is done
vt-x: not supported
Booting all finished, dropped to user space
:phys_mem_16k:     Allocator 0x2fe7b30 dump:
 Block: [0000000000200000,0000000000240000) size=256K avail=256K max_avail=256K
 => mem_size=262144 (0 MB) / mem_avail=262144 (0 MB)

Warning: device memory in range [0000000100000000,0000000200000000) is unavailable (due to limited untyped cnode range)
Warning: device memory in range [0000000200000000,0000000400000000) is unavailable (due to limited untyped cnode range)
Warning: device memory in range [0000000400000000,0000000800000000) is unavailable (due to limited untyped cnode range)
Warning: device memory in range [0000000800000000,0000001000000000) is unavailable (due to limited untyped cnode range)
Warning: device memory in range [0000001000000000,0000002000000000) is unavailable (due to limited untyped cnode range)
Warning: device memory in range [0000002000000000,0000004000000000) is unavailable (due to limited untyped cnode range)
Warning: device memory in range [0000004000000000,0000008000000000) is unavailable (due to limited untyped cnode range)
Warning: device memory in range [0000008000000000,0000408000000000) is unavailable (due to limited untyped cnode range)
Warning: device memory in range [0000408000000000,0000608000000000) is unavailable (due to limited untyped cnode range)
Warning: device memory in range [0000608000000000,0000708000000000) is unavailable (due to limited untyped cnode range)
Warning: device memory in range [0000708000000000,0000788000000000) is unavailable (due to limited untyped cnode range)
Warning: device memory in range [0000788000000000,00007c8000000000) is unavailable (due to limited untyped cnode range)
Warning: device memory in range [00007c8000000000,00007e8000000000) is unavailable (due to limited untyped cnode range)
Warning: device memory in range [00007e8000000000,00007f8000000000) is unavailable (due to limited untyped cnode range)
Warning: device memory in range [00007f8000000000,0000800000000000) is unavailable (due to limited untyped cnode range)
virtual address layout of core:
 overall    [0000000000002000,0000000200000000)
 core image [0000000002000000,000000000386a000)
 ipc buffer [000000000386a000,000000000386b000)
 boot_info  [000000000386b000,000000000386d000)
 stack area [0000000040000000,0000000050000000)
Warning: need physical memory, but Platform object not constructed yet
Warning: need physical memory, but Platform object not constructed yet
Warning: need physical memory, but Platform object not constructed yet
boot module 'status_bar' (131872 bytes)
boot module 'input_filter' (200192 bytes)
boot module 'init' (345536 bytes)
boot module 'scout' (1788016 bytes)
boot module 'report_rom' (128160 bytes)
boot module 'timer' (120736 bytes)
boot module 'en_us.chargen' (13500 bytes)
boot module 'launchpad' (829744 bytes)
boot module 'ld.lib.so' (1020368 bytes)
boot module 'test-libpng_static' (154016 bytes)
boot module 'nitlog' (144392 bytes)
boot module 'vesa_fb_drv' (127432 bytes)
boot module 'ps2_drv' (181488 bytes)
boot module 'usb_drv' (1400368 bytes)
boot module 'rom_filter' (121520 bytes)
boot module 'testnit' (108568 bytes)
boot module 'platform_drv' (334464 bytes)
boot module 'config' (5603 bytes)
boot module 'drivers.config' (4788 bytes)
boot module 'nitpicker' (378296 bytes)
boot module 'init.xsd' (7148 bytes)
boot module 'fb_drv.config' (51 bytes)
boot module 'nit_focus' (97520 bytes)
boot module 'acpi_drv' (155480 bytes)
boot module 'pointer' (154656 bytes)
boot module 'launchpad.config' (594 bytes)
boot module 'global_keys_handler' (164400 bytes)
boot module 'special.chargen' (1346 bytes)
boot module 'liquid_fb' (684584 bytes)
boot module 'input_filter.config' (768 bytes)
Warning: need physical memory, but Platform object not constructed yet
Genode 19.08
369 MiB RAM and 261141 caps assigned to init
Warning: void Genode::Rpc_cap_factory::free(Genode::Native_capability) not implemented - resources leaked: 0x1
Warning: void Genode::Rpc_cap_factory::free(Genode::Native_capability) not implemented - resources leaked: 0x2
Warning: void Genode::Rpc_cap_factory::free(Genode::Native_capability) not implemented - resources leaked: 0x4
Warning: void Genode::Rpc_cap_factory::free(Genode::Native_capability) not implemented - resources leaked: 0x8
Warning: void Genode::Rpc_cap_factory::free(Genode::Native_capability) not implemented - resources leaked: 0x10
Warning: void Genode::Rpc_cap_factory::free(Genode::Native_capability) not implemented - resources leaked: 0x20
[init -> drivers -> fb_drv] Framebuffer with 80x25x16 @ 0xb8000 type=2 pitch=160
[init -> drivers -> fb_drv] Error: unsupported resolution (bpp or/and type)
[init -> drivers -> fb_drv] Error: __cxa_guard_abort called
Kernel: Thread 'ep' died because of an uncaught exception
[init -> drivers -> fb_drv] Error: Uncaught exception of type 'Genode::Service_denied'
[init -> drivers -> fb_drv] Warning: abort called - thread: ep
[init -> drivers -> acpi_drv] Found MADT
[init -> drivers -> acpi_drv] MADT IRQ 0 -> GSI 2 flags: 0
[init -> drivers -> acpi_drv] MADT IRQ 5 -> GSI 5 flags: 13
[init -> drivers -> acpi_drv] MADT IRQ 9 -> GSI 9 flags: 13
[init -> drivers -> acpi_drv] MADT IRQ 10 -> GSI 10 flags: 13
[init -> drivers -> acpi_drv] MADT IRQ 11 -> GSI 11 flags: 13
[init -> drivers -> acpi_drv] Found MCFG
[init -> drivers -> acpi_drv] MCFG BASE 0xb0000000 seg 0x0 bus 0x0-0xff
Warning: void Genode::Rpc_cap_factory::free(Genode::Native_capability) not implemented - resources leaked: 0x40
[init -> drivers -> acpi_drv] RSDT OEM 'BOCHS ', table id 'BXPCRSDT', revision 1, creator 'BXPC' (1)
[init -> drivers] child "fb_drv" exited with exit value 1
[init -> drivers -> platform_drv] ECAM/MMCONF range 00:00.0-ff:1f.7 - addr [00000000b0000000,00000000c0000000)
[init -> drivers -> platform_drv] Root bridge: 00:00.0
[init -> drivers -> acpi_drv] SMBIOS table (entry point: 0x1a6900 structures: 0xf6920)
Warning: void Genode::Rpc_cap_factory::free(Genode::Native_capability) not implemented - resources leaked: 0x80
[init -> drivers -> ps2_drv] Using keyboard with scan code set 1 (xlate)
[init -> drivers -> usb_drv] Could not read screen resolution in config node
[init -> drivers -> usb_drv] Configured HID screen with 0x0 (multitouch=false)
[init -> drivers -> usb_drv] No <storage> config node found - not starting the USB Storage (Block) service
[init -> drivers -> usb_drv] No <nic> config node found - not starting the USB Nic (Network) service
[init -> drivers -> usb_drv] No <raw> config node found - not starting external USB service
[init -> drivers -> usb_drv] Enabled UHCI (USB 1.0/1.1) support
[init -> drivers -> usb_drv] Enabled EHCI (USB 2.0) support
[init -> drivers -> usb_drv] Enabled XHCI (USB 3.0) support
[init -> drivers -> ps2_drv] detected ExPS/2 mouse - activating scroll-wheel and 5-button support
[init -> drivers -> platform_drv] PS2 uses IRQ, vector 0x1
[init -> drivers -> platform_drv] PS2 uses IRQ, vector 0xc
```
 
73's,
Adam Wiethuechter, Jr Software Engineer
Critical Technologies Inc. (CTI)
Desk: (315)-793-0248 x157
Cell: (315)-552-4298
<adam.wiethuechter@critical.com>
On 9/14/19 5:05 AM, Alexander Boettcher wrote:
On 13.09.19 22:53, Adam T. Wiethuechter wrote:

[init -> drivers -> platform_drv] PS2 uses IRQ, vector 0x1
[init -> drivers -> platform_drv] PS2 uses IRQ, vector 0xc
[init -> drivers -> fb_drv] Found PCI VGA at 00:01.0
[init -> drivers -> fb_drv] fb mapped to 0x6000
Warning: void Genode::Rpc_cap_factory::free(Genode::Native_capability)
not implemented - resources leaked: 0x80
[init -> drivers] child "input_filter" requests resources: ram_quota=20480

I can reproduce at least this message. After increasing the ram quota
[0] and rebuilding the respective package [1] it boots up into the GUI.
Can you please re-try ?

In case you run your Linux in a VM and get strange mouse events with
qemu, please consider the countermeasures in [3].

[0]
https://github.com/alex-ab/genode/commit/64e51cb93783561785e83eec7dcd5f617f097144
[1] tool/depot/create genodelabs/pkg/x86_64/drivers_interactive-pc
CROSS_DEV_PREFIX=/usr/local/genode/tool/19.05/bin/genode-x86- -j4
UPDATE_VERSIONS=1 FORCE=1
[3] https://lists.genode.org/pipermail/users/2017-March/005074.html