Bug 1097361

Summary: Bad resolution with kernel 3.15.0-0.rc5.git0.1.fc21
Product: [Fedora] Fedora Reporter: dominique <chepioq>
Component: kernelAssignee: Kernel Maintainer List <kernel-maint>
Status: CLOSED NOTABUG QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: high Docs Contact:
Priority: unspecified    
Version: rawhideCC: chepioq, gansalmon, itamar, jonathan, kernel-maint, madhu.chinakonda, mchehab
Target Milestone: ---   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2014-05-13 19:07:59 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
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Description Flags
Dmesg with bad kernel
none
Dmesg with good kernel none

Description dominique 2014-05-13 15:53:43 UTC 
I update my rawhide F21 to kernel 3.15.0-0.rc5.git0.1.fc21, but with this kernel I have a bad resolution, 1024x768, but my laptop work with 1600x900.
Output of xrandr (version 1.4):
 
[dominique@host ~]$ xrandr
xrandr: Failed to get size of gamma for output default
Screen 0: minimum 640 x 480, current 1024 x 768, maximum 1024 x 768
default connected primary 1024x768+0+0 0mm x 0mm
   1024x768       61.0* 
   800x600        61.0  
   640x480        60.0  
[dominique@host ~]$

Same output with kernel 3.15.0-0.rc2.git0.1.fc21 : 

 [dominique@host ~]$ xrandr
Screen 0: minimum 320 x 200, current 1600 x 900, maximum 8192 x 8192
LVDS-1 connected primary 1600x900+0+0 (normal left inverted right x axis y axis) 382mm x 215mm
   1600x900       60.0*+
   1152x864       60.0  
   1024x768       59.9  
   800x600        59.9  
   640x480        59.4  
   720x400        59.6  
   640x400        60.0  
   640x350        59.8  
VGA-1 disconnected (normal left inverted right x axis y axis)
HDMI-1 disconnected (normal left inverted right x axis y axis)
[dominique@host ~]$

With this kernel I have a good resolution, 1600x900.

It's a bug or not ?
Comment 1 Josh Boyer 2014-05-13 16:01:48 UTC 
Please attach the output of dmesg from both the good and bad kernels.
Comment 2 dominique 2014-05-13 17:10:11 UTC 
Created attachment 895199 [details]
Dmesg with bad kernel

Dmesg with bad kernel
Comment 3 dominique 2014-05-13 17:11:13 UTC 
Created attachment 895201 [details]
Dmesg with good kernel

Dmesg with good kernel
Comment 4 Josh Boyer 2014-05-13 18:29:57 UTC 
In your good kernel version dmesg, you're using the nouveau driver which is loading properly.  In your bad kernel version dmesg you have nouveau blacklisted, so it isn't loading at all.

I'm guessing at some point you installed the proprietary nvidia driver and that stopped working.  Fedora doesn't provide or support the nvidia driver, so we can't help with issues there.

If you aren't using the nvidia driver, I have no idea why nouveau is blacklisted.  Remove the blacklist and see if it works.
Comment 5 dominique 2014-05-13 19:07:59 UTC 
Thank for your response, that solve problem.
I used nvidia drivers but I remove it because they don't work with kernel 3.15.0-0.rc5 (problem with ABI version).

I don't know why nouveau is blacklisted with this kernel, but I remove that in grub.conf and I have the good resolution.

I closed this bug as notabug.
Thank.