On 09/22/2017 09:38 AM, Markus Kilås wrote: > On 09/20/2017 10:16 PM, yuraei...@gmail.com wrote: >> On Wednesday, September 20, 2017 at 3:16:59 PM UTC, Markus Kilås wrote: >>> On 09/08/2017 06:17 AM, Pagebao wrote: >>>> Same thing is happening to me since the last Dom0 update. My ultrawide 29" >>>> LG external screen stopped working at the native 2560x1080 resolution and >>>> instead is working at 1920x1080. >>> >>> Oh, that is interesting to know. I did not know this was a regression as >>> I did not use external monitor before. >>> >>>> >>>> I have a Lenovo Thinkpad T430s. I was using nouveau driver but the same >>>> thing is happening with the integrated Intel graphic card. >>>> >>>> Fortunately I had a full backup from August 9 so, reinstalling Qubes 3.2 >>>> and restoring Dom0 and all the VM the problem is, temporarily, fixed and >>>> I have back 2560x1080 resolution. >>>> >>>> But the most maddening thing is that I tried several different distro >>>> (Linux Mint 18.2, MX 16.0, Manjaro) and I have the same problem. Only >>>> 1920x1080px. In the previous 1.5 years I had no problem of resolution with >>>> Qubes 3.2 and Linux Mint 18.1. >>>> >>> >>> So it could be more of generic Linux issue then? Some problem with >>> certain kernel or nouveau versions perhaps? >>> >>>> Tried cvt and xrandr --newmode and --addmode to no avail so far (no effect >>>> on Qubes, screen blanked on Linux Mint). >>>> >>>> Again, any idea?> >>>> Thanks >>>> >>> >>> Anything else one can try to resolve this? >>> >>> Cheers, >>> Markus >> >> Did you try going back to the previous kernel? The 4.9.35-20? or even the >> 4.4'ish version if its still in your system?> Also it may not be relevant as >> my problem with the new kernel > (4.9.45-21) is of a seemingly very different nature (didn't boot due to > wanting root account, whatever odd bug was causing that error). Albeit I > never made it as far to see whether I lost my resolution as well while > running the new kernel. > > I believe I was on 4.9.35-20 and had the issue but will double check. > >> >> Assuming you haven't gone back to older kernels before, it's easy to do >> without uninstalling/installing anything. If you got Grub2 (Legacy Qubes >> install mode), then just change to the old kernel during early boot in >> Grub2's advance menu. If you boot up with UEFI/EFI then you need to change >> the default boot kernel in the /boot/efi/Qubes/xen.conf (somewhere there >> abouts. Be careful though, wrong settings will make your system unable to >> boot up). >> >> Obviously far easier to quickly change with Grub2, but it isn't much of a >> hassle either with editing the xen.cong file if you boot via the modern UEFI >> instead. Just be careful with the settings. > > Thank you, this instructions are very helpful. > > > I am using Grub2 and legacy boot so will try the different kernels on > Tuesday when I am back in office and have access to the monitor. > > >> >> Also if it may be of any help, I run Qubes with 3840x2160, 4k resolution >> with kernel 4.9.35-20, nvidia/integrated Intel-M processor graphics, and >> XFCE4 as my DE. As mentioned earlier, I'm holding back on the current new >> Dom0 update with the 4.9.45-21, since it gives me boot issues. Furthermore, >> I have a lot of issues getting my HDMI TV back on my laptop after >> suspend/hibernation on my current older kernel. Also if I unplug the HDMI, >> etc. usually I need to go into "xfce4-display" and turn on the screen >> manually. Maybe its related to some of the black screen mentioned issues, >> albeit it might be different too. >> >> I'm afraid I can't try help with anything deeper if the problem still >> persists. Remember to make backups before experimenting with solutions >> though, it's such a pain to loose things... >> >> If kernels are a suspect, we should list our kernels in case we can find >> clues. Try throw "uname -r" in your Dom0 terminal to list it. >> > > Currently I have uname -a: > Linux dom0 4.9.45-21.pvops.qubes.x86_64 #1 SMP Tue Aug 29 14:21:02 UTC > 2017 x86_64 x86_64 x86_64 GNU/Linux > > I will retry 4.9.45-20 and also try the oldest I have which is 4.9.35-19.
I have the issue with all three available kernels: 4.9.45-21 4.9.35-20 4.9.35-19 Is there a way to install older kernels? I tried "sudo qubes-dom0-update --action=list kernel-qubes-vm" but those are the only available. Regards, Markus -- You received this message because you are subscribed to the Google Groups "qubes-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to qubes-users+unsubscr...@googlegroups.com. To post to this group, send email to qubes-users@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-users/528f367a-6ef9-a586-f702-5187d58a7dd8%40xn--kils-soa.se. For more options, visit https://groups.google.com/d/optout.