Bug 10666
Summary: | cfag12864bfb messing up vc on load | ||
---|---|---|---|
Product: | Drivers | Reporter: | Roland Kletzing (devzero) |
Component: | Console/Framebuffers | Assignee: | James Simmons (jsimmons) |
Status: | RESOLVED CODE_FIX | ||
Severity: | low | CC: | miguel.ojeda.sandonis |
Priority: | P1 | ||
Hardware: | All | ||
OS: | Linux | ||
Kernel Version: | 2.6.21+ | Subsystem: | |
Regression: | No | Bisected commit-id: |
Description
Roland Kletzing
2008-05-11 05:10:41 UTC
Reply-To: akpm@linux-foundation.org (switched to email. Please respond via emailed reply-to-all, not via the bugzilla web interface). On Sun, 11 May 2008 05:10:41 -0700 (PDT) bugme-daemon@bugzilla.kernel.org 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: jsimmons@infradead.org > ReportedBy: devzero@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. > > > -- > Configure bugmail: http://bugzilla.kernel.org/userprefs.cgi?tab=email > ------- You are receiving this mail because: ------- > You are on the CC list for the bug, or are watching someone who is. apparently, i cannot reproduce this on 2.6.28-rc2-git3 as nothing appropriate changed in the driver code, there must be some change in the console/framebuffer-layer which has fixed that. I tested long ago the driver at 2.6.25 (even sooner, but that is the first time I remember clearly) and it worked nicely again. I will perform a re-test on 2.6.27. Roland Kletzing is right, the code hasn't changed since years ago (as far as I know), so maybe someone changed some fb layer behaviour for a couple of months? It appears to have been resolved |