[BRLTTY] Sudden USB disconnects on Focus 40 Blue

[Frans-Willem Post]

Hello all,

Sorry for the noise. After updating the display's firmware version to 
5.82-26 inside a Windows virtual machine, the display is back in working 
order.

Issue solved, kind regards,
Frans-Willem

On 05-03-2024 10:51, Frans-Willem Post wrote:
> Dear list,
> 
> Running BRLTTY 6.6 (and Orca main) under Fedora 39 with X11.
> 
> Since today, my Focus 40 Blue braille display no longer works. Fedora 
> received an update to kernel 6.7.7, but the issue is present with kernel 
> 6.7.6, too.
> 
> I have checked the USB-cable and the connections; they are all fine. An 
> older Focus 40 is fine, too.
> 
> The BRLTTY service is running and active.
> dmesg --follow gives me these lines, over and over again:
> 
> [  451.167748] usb 2-1: new high-speed USB device number 50 using xhci_hcd
> [  451.294407] usb 2-1: New USB device found, idVendor=0f4e, 
> idProduct=0114, bcdDevice= 5.81
> [  451.294421] usb 2-1: New USB device strings: Mfr=1, Product=2, 
> SerialNumber=3
> [  451.294426] usb 2-1: Product: FOCUS 5
> [  451.294430] usb 2-1: Manufacturer: Freedom Scientific
> [  451.294433] usb 2-1: SerialNumber: 1234567
> [  456.167837] usb 2-1: usbfs: USBDEVFS_CONTROL failed cmd brltty rqt 
> 128 rq 6 len 255 ret -110
> [  457.191813] usb 2-1: usbfs: USBDEVFS_CONTROL failed cmd brltty rqt 
> 128 rq 6 len 255 ret -110
> [  458.215765] usb 2-1: usbfs: USBDEVFS_CONTROL failed cmd brltty rqt 
> 128 rq 6 len 255 ret -110
> [  459.304865] usb 2-1: USB disconnect, device number 50
> 
> I have reset the braille display to its factory defaults (Right selector 
> + Right shift + Left mode + power), but it behaves the same, afterwards.
> 
> On a different Fedora 39 system, the issue is the same. My current Focus 
> 40 gives me the above lines in the system log, the older Focus works 
> normally.
> 
> Can someone help me pinpoint the issue and make my Focus 40 work again?
> 
> Thanks and kind regards,
> Frans-Willem
> 

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