From Bugzilla Helper: User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.5) Gecko/20041107 Firefox/1.0 Description of problem: With a US Robotics Faxmodem 56k model 5610, attempta by a user process to write to the UART fail, resulting in an error return. This problem appeared after the 681 version. Versions from RH9 to 681 do not have this problem. Opening the serial port and setting the speed do not return errors. The motherboard serial port sends characters normally. This problem is seen with two 5610 boards. Both work in older versions, neither works with versions >681. p.s. Opening a serial port whose hardware does not exist should return an error. Beyond that, it should not be possible to set speed on a port that doesn't exist. caf Version-Release number of selected component (if applicable): Fedora Core subsequent to 681 How reproducible: Always Steps to Reproduce: 1.Install 5610 hardware modem PCI card 2.open port, set speed 3. Write to the port Actual Results: write error errno=5 Expected Results: Should send characters to the modem Additional info:
An update has been released for Fedora Core 3 (kernel-2.6.12-1.1372_FC3) which may contain a fix for your problem. Please update to this new kernel, and report whether or not it fixes your problem. If you have updated to Fedora Core 4 since this bug was opened, and the problem still occurs with the latest updates for that release, please change the version field of this bug to 'fc4'. Thank you.
Not a bug per se. The new version remapped TTYS4 to TTYS14. The modem is alive and well at TTYS14.