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New: cfag12864bfb messing up vc on load

Bugme-new Andrew Morton 1 participant 1 message May 11, 2008 1 message not in the archive Framebuffer layer

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A message that is not in the archive (sent off-list or not yet received): [email protected]/

Andrew Morton

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(switched to email. Please respond via emailed reply-to-all, not via the bugzilla web interface).

Quoted 38 lines · On Sun, 11 May 2008 05:10:41 -0700 (PDT) [email protected] wrote:

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: [email protected]
        ReportedBy: [email protected]

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 dont have appropriate hardware attached, cannot test with hw attached (dont 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

Quoted 14 lines

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 didnt happen initially. iirc, he thinks this is a regression due to change in framebuffer layer. didnt get a response since then, maybe hes lacking time. im putting it here so its being marked as a ToDo and wont get lost.

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