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Old 04-08-2014, 10:03 AM   #1
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Registered: Apr 2009
Posts: 3

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lost screen resolution after Debian/Jessie upgrade

After update/upgrade within Debian/Jessie (affecting some 50 packages) and a reboot (after an uptime of about a month), the full resolution 2560x1440 of my Dell U2713HM has gone. xrandr is listing at most 1920x1200.

Given the long history of my installation, I tried a radical cure, purging all xorg related packages, and reinstalling them. No effect, still limited to 1920x1200.

Then I tried

~$ cvt 2560 1440
# 2560x1440 59.96 Hz (CVT 3.69M9) hsync: 89.52 kHz; pclk: 312.25 MHz
Modeline "2560x1440_60.00" 312.25 2560 2752 3024 3488 1440 1443 1448 1493 -hsync +vsync
~$ xrandr --newmode "2560x1440" 312.25 2560 2752 3024 3488 1440 1443 1448 1493 -hsync +vsync
~$ xrandr --addmode HDMI1 2560x1440
~$ xrandr --output HDMI1 --mode 2560x1440
xrandr: Configure crtc 0 failed

The only trace of this in Xorg.0.log is the following:

[ 3263.882] (II) intel(0): Allocated new frame buffer 2560x1440 stride 10240, tiled
[ 3264.048] (EE) intel(0): failed to set mode: Invalid argument
[ 3264.080] (II) intel(0): Allocated new frame buffer 1920x1200 stride 7680, tiled

According to lspci -v, my video device is the following:

00:02.0 VGA compatible controller: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller (rev 06) (prog-if 00 [VGA controller])
Subsystem: Fujitsu Technology Solutions Device 11e7
Flags: bus master, fast devsel, latency 0, IRQ 46
Memory at f7800000 (64-bit, non-prefetchable) [size=4M]
Memory at e0000000 (64-bit, prefetchable) [size=256M]
I/O ports at f000 [size=64]
Expansion ROM at <unassigned> [disabled]
Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
Capabilities: [d0] Power Management version 2
Capabilities: [a4] PCI Advanced Features
Kernel driver in use: i915

Since I installed the full xorg dependency package, missing drivers is not a likely explanation.

Old and new log files at

NB: double posting with, which seems to attract very little views. Following advice given there, I also went to the xorg mailing list.

Last edited by j1wu; 04-08-2014 at 12:10 PM. Reason: disclosure of multiple posting
Old 04-09-2014, 07:17 AM   #2
LQ Newbie
Registered: Apr 2009
Posts: 3

Original Poster
Rep: Reputation: 0
It's a driver bug.

The thread indicates some recently introduced problem with the Intel driver.

As was to be expected from that discussion, the problem only occurs with DVI cable. After switching to a DisplayPort cable, my full resolution was back.


debian, display, resolution, xorg

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