Red Hat Bugzilla – Bug 591774
screen remains dim when coming back from idle
Last modified: 2017-12-06 07:26:02 EST
Created attachment 413630 [details]
Description of problem:
RHEL6.0 beta install on a Lenovo Thinkpad T500 (discrete graphics mode).
If the text console is showing (via ctrl-alt-F2) and the machine is left idle for a while, the screen blanker kicks in. However, when a key is kit thus causing the login prompt to become visible again, the display is set to its dimmest setting. Using the thinkpad keys to increase the display brightness has no effect while in text mode. Using alt-F1 to go back to graphics mode, the graphics screen is at its dimmest setting as well. Once in graphics mode, the thinkpad keys can be used to increase the brightness again.
In gnome-power-manager for AC power (where this occurs), the box "Dim display when idle" is NOT checked and "set display brightness to" is 100%. (For battery power, "dim display when idle" is checked.)
If the system is in graphics mode when it goes idle and the display is blanked out, then it is at the proper brightness when a key is pressed.
Let me know what other diags are desired. (dmesg attached)
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Ctrl-alt-F2 to get to text login prompt
2. Let the system go idle. The screen will blank
3. Touch a key. The screen will unblank but will be very dim
Actual results: on return from idle, the display is set to its dimmest setting
Expected results: on return from idle, the display should be at the original brightness
This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux major release. Product Management has requested further
review of this request by Red Hat Engineering, for potential inclusion in a Red
Hat Enterprise Linux Major release. This request is not yet committed for
Also when you try to adjust brightness back to normal in login screen it does not work. It works after logging in. T400 with discrete graphics, ati mobility radeon hd 3470.
This issue has been proposed when we are only considering blocker
issues in the current Red Hat Enterprise Linux release. It has
been denied for the current Red Hat Enterprise Linux release.
** If you would still like this issue considered for the current
release, ask your support representative to file as a blocker on
your behalf. Otherwise ask that it be considered for the next
Red Hat Enterprise Linux release. **
Yeah it is still an issue with beta2refresh
Since RHEL 6.1 External Beta has begun, and this bug remains
unresolved, it has been rejected as it is not proposed as
exception or blocker.
Red Hat invites you to ask your support representative to
propose this request, if appropriate and relevant, in the
next release of Red Hat Enterprise Linux.
The brightness is not supposed to be changed when sitting on a different VT. Can you do something like this and post the logs please:
(in vt7, i.e. X)
Then switch to vt1, wait for the bug, then post the complete logs. Thanks.
think I have this, my brightness keeps going down to zero and staying there
Red Hat Enterprise Linux 6 is in the Production 3 Phase. During the Production 3 Phase, Critical impact Security Advisories (RHSAs) and selected Urgent Priority Bug Fix Advisories (RHBAs) may be released as they become available.
The official life cycle policy can be reviewed here:
This issue does not meet the inclusion criteria for the Production 3 Phase and will be marked as CLOSED/WONTFIX. If this remains a critical requirement, please contact Red Hat Customer Support to request a re-evaluation of the issue, citing a clear business justification. Note that a strong business justification will be required for re-evaluation. Red Hat Customer Support can be contacted via the Red Hat Customer Portal at the following URL: