Known issues commonly reported

Wikis > ArcaOS > Known issues commonly reported

Before opening a fresh ticket, please review the README files in the root of the installation ISO and installed to \sys\doc\ArcaOS, paying particular attention to the Known Issues sections. Additionally, per the Best Practices wiki page, please search the bug tracker for similar issues before reporting another instance of the same condition. Duplicate tickets cause more work for everyone.

This page is meant to supplement the README with the latest information available concerning the most commonly reported issues of which we are already aware.

DOS and/or WIN-OS/2 sessions do not work

This is a known condition on many newer systems. It is mentioned in the README in the list of known issues. Generally, this is due to an incompatibility in the BIOS of the system with the DOS VDM code in ArcaOS (inherited from IBM’s OS/2 Warp 4).

Arca Noae is continuing to work on addressing this (and other causes of failure of DOS sessions to start).

Some possible workarounds:

Modify the VSVGA.SYS line in CONFIG.SYS to include the following parameter:

DEVICE=N:\OS2\MDOS\VSVGA.SYS /int10textgrfxsafe

With the above change, it may be necessary to append the following to AUTOEXEC.BAT (located either in the root directory of the boot volume or where specified for the DOS session object):

mode co80
 cls

Another option, when full screen sessions work but windowed ones do not, is to open a full screen session first, and then press Alt-Home to switch it to a windowed session (this only works for DOS sessions, not OS/2 full screen and windowed sessions).

The main tracking ticket for progress on this issue is #1193.

USB device issues

Issues pertaining to inability to access USB-connected drives, often involving USB-attached DVD drives, where the installation disc starts to boot and then prompts for insertion of the medium (which is obviously already installed) are often the result of unsupported USB controllers (USB 3).

To be clear, it is not always easy to tell which systems have USB 2 controllers driving their USB 2 ports, and which ones actually only have USB 3 controllers driving their USB 2 ports. ArcaOS 5.0.2 requires the presence of a USB 2 controller, attached to the USB 2 port where the device to be accessed is attached.

USB 3 support is under active development and it is anticipated that this restriction will be lifted in a future release.

Note that this same behavior will be observed for USB-attached keyboards and mice. When so-called legacy support is enabled in the system BIOS, USB devices are handled by the system BIOS directly. Once the device driver has been loaded, however, control is handed off to the software driver. If the software driver lacks support for the type of USB controller to be driven, then nothing has control of USB, and these ports, while still allowing current to flow (they work for charging and powering other devices, of course, with or without a software driver) are effectively ignored by ArcaOS. This is why keyboards will work for preboot selection during installation, for example, but upon entering the installation environment following boot, no input is possible.

Possible workarounds:

If this is a desktop system, install a USB 2 controller card. Often, these cards include 2 or 4 ports on the bracket and perhaps an internal port or header, as well. This allows them to supplement the onboard USB 3 controller present in the system. Connect all devices needed to be accessed by ArcaOS to this USB 2 adapter.

Portables offer greater challenges for workarounds. It is likely that support for USB 3 will be available before we have any viable workarounds for these machines.