Bug 1252095 - [kms] native screen resolution missing after kernel update to 4.0 (radeon) [NEEDINFO]
[kms] native screen resolution missing after kernel update to 4.0 (radeon)
Product: Fedora
Classification: Fedora
Component: kernel (Show other bugs)
Unspecified Unspecified
unspecified Severity unspecified
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Assigned To: Kernel Maintainer List
Fedora Extras Quality Assurance
Depends On:
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Reported: 2015-08-10 13:17 EDT by Miroslav Lichvar
Modified: 2015-11-23 12:13 EST (History)
6 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2015-11-23 12:13:19 EST
Type: Bug
Regression: ---
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Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---
jforbes: needinfo?

Attachments (Terms of Use)
Xorg log with kernel 3.19 (38.40 KB, text/plain)
2015-08-10 13:19 EDT, Miroslav Lichvar
no flags Details
Xorg log with kernel 4.1.2 (38.15 KB, text/plain)
2015-08-10 13:20 EDT, Miroslav Lichvar
no flags Details

  None (edit)
Description Miroslav Lichvar 2015-08-10 13:17:05 EDT
Description of problem:
Since the kernel was updated to 4.0 on a Thinkpad T42 with a Radeon R350/R360 card (1002:4e50), the kms no longer seems to allow the native resolution of 1400x1050, the highest resolution is 1280x1024.

IIRC this regression was introduced in the first 4.0 kernel that was released in F21. The machine was upgraded to F22 since then, but booting to 3.19.4-200.fc21.i686 still fixes the problem. There are no kms or video parameters on the kernel command line.

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. boot to X on the T42 laptop
2. check current resolution

Actual results:

Expected results:

Additional info:
Comment 1 Miroslav Lichvar 2015-08-10 13:19:18 EDT
Created attachment 1061177 [details]
Xorg log with kernel 3.19
Comment 2 Miroslav Lichvar 2015-08-10 13:20:33 EDT
Created attachment 1061178 [details]
Xorg log with kernel 4.1.2
Comment 3 Justin M. Forbes 2015-10-20 15:23:59 EDT
*********** MASS BUG UPDATE **************

We apologize for the inconvenience.  There is a large number of bugs to go through and several of them have gone stale.  Due to this, we are doing a mass bug update across all of the Fedora 22 kernel bugs.

Fedora 22 has now been rebased to 4.2.3-200.fc22.  Please test this kernel update (or newer) and let us know if you issue has been resolved or if it is still present with the newer kernel.

If you have moved on to Fedora 23, and are still experiencing this issue, please change the version to Fedora 23.

If you experience different issues, please open a new bug report for those.
Comment 4 Fedora Kernel Team 2015-11-23 12:13:19 EST
*********** MASS BUG UPDATE **************
This bug is being closed with INSUFFICIENT_DATA as there has not been a response in over 4 weeks. If you are still experiencing this issue, please reopen and attach the relevant data from the latest kernel you are running and any data that might have been requested previously.

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