[Bugme-new] [Bug 10666] New: cfag12864bfb messing up vc on load

[bugme-daemon at bugzilla.kernel.org]

http://bugzilla.kernel.org/show_bug.cgi?id=10666

           Summary: cfag12864bfb messing up vc on load
           Product: Drivers
           Version: 2.5
     KernelVersion: 2.6.21+
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: low
          Priority: P1
         Component: Console/Framebuffers
        AssignedTo: jsimmons at infradead.org
        ReportedBy: devzero at web.de


Latest working kernel version: n/a

Earliest failing kernel version: at least 2.6.21

Distribution: opensuse 10.3

Hardware Environment: vmware

Software Environment: opensuse 10.3 + kernel 2.6.26rc1

Problem Description:
when doing some module regression testing (load/unload most available modules),
cfag12864bfb driver always kills the local console on load and locks you out.
visible area of vc shrinks to 16x4 and output freezing. this happens if you
don`t have appropriate hardware attached, cannot test with hw attached (don`t
own such). no vc switching afterwards. cannot unload module from remote (ssh)
either. need reboot.

Steps to reproduce:
save all of your important data, switch to textconsole, modprobe cfag12864bfb 

dmesg shows:
Console: switching to mono frame buffer device 16x8
fb0: cfag12864b frame buffer device

contacted the author who confirmed the issue and tells that this didn`t happen
initially. iirc, he thinks this is a regression due to change in framebuffer
layer. didn`t get a response since then, maybe he`s lacking time.
i`m putting it here so it`s being marked as a ToDo and won`t get lost.


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